historical+bibliography

SUBJECT AREA: Metallurgy

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His father was a mason and brickmaker but, anxious to improve himself, Cort set up in London in 1765 as a navy agent, said to have been a profitable business. He recognized that, at that time, the conversion of pig iron to malleable or wrought iron, which was needed in increasing quantities as developments in industry and mechanical engineering gathered pace, presented a bottleneck in the ironmaking process. The finery hearth was still in use, slow and inefficient and requiring the scarce charcoal as fuel. To tackle this problem, Cort gave up his business and acquired a furnace and slitting mill at Fontley, near Fareham in Hampshire. In 1784 he patented his puddling process, by which molten pig iron on the bed of a reverberatory furnace was stirred with an iron bar and, by the action of the flame and the oxygen in the air, the carbon in the pig iron was oxidized, leaving nearly pure iron, which could be forged to remove slag. In this type of furnace, the fuel and the molten iron were separated, so that the cheaper coal could be used as fuel. It was the stirring action with the iron bar that gave the name "puddling" to the process. Others had realized the problem and reached a similar solution, notably the brothers Thomas and George Cranage, but only Cort succeeded in developing a commercially viable process. The laborious hammering of the ball of iron thus produced was much reduced by an invention of the previous year, 1783. This too was patented. The iron was passed between grooved rollers to form it into bars. Cort entered into an agreement with Samuel Jellico to set up an ironworks at Gosport to exploit his inventions. Samuel's father Adam, Deputy Paymaster of the Navy, advanced capital for this venture, Cort having expended much of his own resources in the experimental work that preceded his inventions. However, it transpired that Jellico senior had, unknown to Cort, used public money to advance the capital; the Admiralty acted to recover the money and Cort lost heavily, including the benefits from his patents. Rival ironmasters were quick to pillage the patents. In 1790, and again the following year, Cort offered unsuccessfully to work for the military. Finally, in 1794, at the instigation of the Prime Minister, William Pitt the Younger, Cort was paid a pension of £200 per year in recognition of the value of his improvements in the technology of ironmaking, although this was reduced by deductions to £160. After his death, the pension to his widow was halved, while some of his children received a pittance. Without the advances made by Cort, however, the iron trade could not have met the rapidly increasing demand for iron during the industrial revolution.

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SUBJECT AREA: Medical technology

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Cushing graduated in medicine from Harvard University in 1895, having already acquired an arts degree at Yale (1891). He held posts in Boston and at Johns Hopkins Hospital, Baltimore, from 1897 until 1890, and then travelled abroad. After studying in Germany and England he returned to Baltimore to become Assistant Professor of Surgery in 1903 working under W.S. Halsted, a post he held until 1912. In 1905 he started specializing in neurosurgery, undertaking much experimental work and developing new instruments and techniques, such as spinal anaesthesia and in particular the electrosurgical methods pioneered by W.T. Bovie.

Returning to Harvard as Professor of Surgery, he established a renowned school of neurosurgery. He retired from Harvard in 1932, becoming Stirling Professor of Neurosurgery until 1937 and then Director of Studies in the History of Medicine at Yale.

His researches in neurophysiology were extensive and the eponymous pituitary syndrome is only one of a large number of discoveries in the field. He was awarded numerous honours, both American and international. He was a noted bibliophile, particularly of medical books and manuscripts, and his own extensive collection was bequeathed to Yale, becoming an important part of the Historical Medical Library.

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SUBJECT AREA: Broadcasting, Electronics and information technology, Photography, film and optics, Recording, Telecommunications

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De Forest was born into the family of a Congregational minister that moved to Alabama in 1879 when the father became President of a college for African-Americans; this was a position that led to the family's social ostracism by the white community. By the time he was 13 years old, De Forest was already a keen mechanical inventor, and in 1893, rejecting his father's plan for him to become a clergyman, he entered the Sheffield Scientific School of Yale University. Following his first degree, he went on to study the propagation of electromagnetic waves, gaining a PhD in physics in 1899 for his thesis on the "Reflection of Hertzian Waves from the Ends of Parallel Wires", probably the first US thesis in the field of radio.

He then joined the Western Electric Company in Chicago where he helped develop the infant technology of wireless, working his way up from a modest post in the production area to a position in the experimental laboratory. There, working alone after normal working hours, he developed a detector of electromagnetic waves based on an electrolytic device similar to that already invented by Fleming in England. Recognizing his talents, a number of financial backers enabled him to set up his own business in 1902 under the name of De Forest Wireless Telegraphy Company; he was soon demonstrating wireless telegraphy to interested parties and entering into competition with the American Marconi Company.

Despite the failure of this company because of fraud by his partners, he continued his experiments; in 1907, by adding a third electrode, a wire mesh, between the anode and cathode of the thermionic diode invented by Fleming in 1904, he was able to produce the amplifying device now known as the triode valve and achieve a sensitivity of radio-signal reception much greater than possible with the passive carborundum and electrolytic detectors hitherto available. Patented under the name Audion, this new vacuum device was soon successfully used for experimental broadcasts of music and speech in New York and Paris. The invention of the Audion has been described as the beginning of the electronic era. Although much development work was required before its full potential was realized, the Audion opened the way to progress in all areas of sound transmission, recording and reproduction. The patent was challenged by Fleming and it was not until 1943 that De Forest's claim was finally recognized.

Overcoming the near failure of his new company, the De Forest Radio Telephone Company, as well as unsuccessful charges of fraudulent promotion of the Audion, he continued to exploit the potential of his invention. By 1912 he had used transformer-coupling of several Audion stages to achieve high gain at radio frequencies, making long-distance communication a practical proposition, and had applied positive feedback from the Audion output anode to its input grid to realize a stable transmitter oscillator and modulator. These successes led to prolonged patent litigation with Edwin Armstrong and others, and he eventually sold the manufacturing rights, in retrospect often for a pittance.

During the early 1920s De Forest began a fruitful association with T.W.Case, who for around ten years had been working to perfect a moving-picture sound system. De Forest claimed to have had an interest in sound films as early as 1900, and Case now began to supply him with photoelectric cells and primitive sound cameras. He eventually devised a variable-density sound-on-film system utilizing a glow-discharge modulator, the Photion. By 1926 De Forest's Phonofilm had been successfully demonstrated in over fifty theatres and this system became the basis of Movietone. Though his ideas were on the right lines, the technology was insufficiently developed and it was left to others to produce a system acceptable to the film industry. However, De Forest had played a key role in transforming the nature of the film industry; within a space of five years the production of silent films had all but ceased.

In the following decade De Forest applied the Audion to the development of medical diathermy. Finally, after spending most of his working life as an independent inventor and entrepreneur, he worked for a time during the Second World War at the Bell Telephone Laboratories on military applications of electronics.

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SUBJECT AREA: Automotive engineering, Land transport, Metallurgy

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From his early years, Haynes was a practising Presbyterian and an active prohibitionist. He graduated in 1881 at Worcester, Massachusetts, and a spell of teaching in his home town was interrupted in 1884–5 while he attended the Johns Hopkins University in Baltimore. In 1886 he became permanently diverted by the discovery of natural gas in Portland. He was soon appointed Superintendent of the local gas undertaking, and then in 1890 he was hired by the Indiana Natural Gas \& Oil Company. While continuing his gas-company employment until 1901, Haynes conducted numerous metallurgical experiments. He also designed an automobile: this led to the establishment of the Haynes- Apperson Company at Kokomo as one of the earliest motor-car makers in North America. From 1905 the firm traded as the Haynes Automobile Company, and before its bankruptcy in 1924 it produced more than 50,000 cars. After 1905, Haynes found the first "Stellite" alloys of cobalt and chromium, and in 1910 he was publicizing the patented material. He then discovered the valuable hardening effect of tungsten, and in 1912 began applying the "improved" Stellite to cutting tools. Three years later, the Haynes Stellite Company was incorporated, with Haynes as President, to work the patents. It was largely from this source that Haynes became a millionaire in 1920. In April 1912, Haynes's attempt to patent the use of chromium with iron to render the product rustless was unsuccessful. However, he re-applied for a US patent on 12 March 1915 and, although this was initially rejected, he persevered and finally obtained recognition of his modified claim. The American Stainless Steel Company licensed the patents of Brearley and Haynes jointly in the USA until the 1930s.

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SUBJECT AREA: Electronics and information technology, Horology

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Hetzel trained as an electrical engineer at the Federal Polytechnic in Zurich and worked for several years in the field of telecommunications before joining the Bulova Watch Company in 1950. At that time several companies were developing watches with electromagnetically maintained balances, but they represented very little advance on the mechanical watch and the mechanical switching mechanism was unreliable. In 1952 Hetzel started work on a much more radical design which was influenced by a transistorized tuning-fork oscillator that he had developed when he was working on telecommunications. Tuning forks, whose vibrations were maintained electromagnetically, had been used by scientists during the nineteenth century to measure small intervals of time, but Niaudet- Breguet appears to have been the first to use a tuning fork to control a clock. In 1866 he described a mechanically operated tuning-fork clock manufactured by the firm of Breguet, but it was not successful, possibly because the fork did not compensate for changes in temperature. The tuning fork only became a precision instrument during the 1920s, when elinvar forks were maintained in vibration by thermionic valve circuits. Their primary purpose was to act as frequency standards, but they might have been developed into precision clocks had not the quartz clock made its appearance very shortly afterwards. Hetzel's design was effectively a miniaturized version of these precision devices, with a transistor replacing the thermionic valve. The fork vibrated at a frequency of 360 cycles per second, and the hands were driven mechanically from the end of one of the tines. A prototype was working by 1954, and the watch went into production in 1960. It was sold under the tradename Accutron, with a guaranteed accuracy of one minute per month: this was a considerable improvement on the performance of the mechanical watch. However, the events of the 1920s were to repeat themselves, and by the end of the decade the Accutron was eclipsed by the introduction of quartz-crystal watches.

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SUBJECT AREA: Steam and internal combustion engines

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Jonathan came from a family with an engineering tradition: his grandfather Joseph had worked under Thomas Newcomen. Jonathan was the sixth child in a family of thirteen whose names all began with "J". In 1781 he was living at Penryn, Cornwall and described himself as a plumber, brazier and engineer. As early as 1776, when he wished to amuse himself by making a small st-eam engine, he wanted to make something new and wondered if the steam would perform more than one operation in an engine. This was the foundation for his compound engine. He worked on engines in Cornwall, and in 1778 was Engineer at the Ting Tang mine where he helped Boulton \& Watt erect one of their engines. He was granted a patent in 1781 and in that year tried a large-scale experiment by connecting together two engines at Wheal Maid. Very soon John Winwood, a partner in a firm of iron founders at Bristol, acquired a share in the patent, and in 1782 an engine was erected in a colliery at Radstock, Somerset. This was probably not very successful, but a second was erected in the same area. Hornblower claimed greater economy from his engines, but steam pressures at that time were not high enough to produce really efficient compound engines. Between 1790 and 1794 ten engines with his two-cylinder arrangement were erected in Cornwall, and this threatened Boulton \& Watt's near monopoly. At first the steam was condensed by a surface condenser in the bottom of the second, larger cylinder, but this did not prove very successful and later a water jet was used. Although Boulton \& Watt proceeded against the owners of these engines for infringement of their patent, they did not take Jonathan Hornblower to court. He tried a method of packing the piston rod by a steam gland in 1781 and his work as an engineer must have been quite successful, for he left a considerable fortune on his death.

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SUBJECT AREA: Electricity, Land transport, Railways and locomotives

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Laithwaite's education at Kirkham Grammar School and Regent Street Polytechnic, London, was followed by service in the Royal Air Force. After entering Manchester University in 1946 and graduating in 1949, he joined the university staff and became Secretary to the Inaugural Conference of the Ferranti Mark I computer. In 1964 he moved to Imperial College of Science and Technology, London, and became Professor of Heavy Electrical Engineering. From 1967 to 1976 he also held the post of External Professor of Applied Electricity at the Royal Institution. Research into the use of linear induction motors as shuttle drives in weaving looms was followed by investigations into their application to conveyors in industrial processes and as high-speed propulsion units for railway vehicles. With considerable involvement in a tracked hovercraft project in the 1960s and 1970s, he proposed the concept of transverse flux and the magnetic river high-speed linear induction machine. Linear motors and electromagnetic levitation have been applied to high-speed propulsion in the United States, France and Japan.

Laithwaite has written five books and over one hundred papers on the subjects of linear motors and electromagnetic levitation. Two series of Christmas lectures were presented by him at the Royal Institution.

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SUBJECT AREA: Photography, film and optics, Recording

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Lauste was a prolific inventor who as a 22-year-old had more than fifty patents to his name. He joined Edison's West Orange Laboratory as Assistant to W.K.L. Dickson in 1887; he was soon involved in the development of early motion pictures, beginning an association with the cinema that was to dominate the rest of his working life. He left Edison in 1892 to pursue an interest in petrol engines, but within two years he returned to cinematography, where, in association with Major Woodville Latham, he introduced small but significant improvements to film-projection systems. In 1900 an interest in sound recording, dating back to his early days with Edison, led Lauste to begin exploring the possibility of recording sound photographically on film alongside the picture. In 1904 he moved to England, where he continued his experiments, and by 1907 he had succeeded in photographing a sound trace and picture simultaneously, each image occupying half the width of the film.

Despite successful demonstrations of Lauste's system on both sides of the Atlantic, he enjoyed no commercial success. Handicapped by lack of capital, his efforts were finally brought to an end by the First World War. In 1906 Lauste had filed a patent for his sound-on-film system, which has been described by some authorities as the master patent for talking pictures. Although this claim is questionable, he was the first to produce a practicable scund-on-film system and establish the basic principles that were universally followed until the introduction of magnetic sound.

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SUBJECT AREA: Medical technology

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Of Quaker stock, his father also being a Fellow of the Royal Society, he studied medicine at University College, London. He qualified, and became a Fellow of the Royal College of Surgeons, in 1852. Wishing to pursue a surgical career, he moved to Edinburgh to study surgery under William Syme, whose daughter he married in 1852, the same year he was appointed Assistant Surgeon to the Edinburgh Royal Infirmary.

Until his appointment as Regius Professor of Surgery at Glasgow University and Glasgow Royal Infirmary in 1861, he was engaged in a wide variety of investigations into the nature of inflammation and the effects of irritants on wounds. Following his move to Glasgow, he became particularly involved in the major problems arising out of the vast increase in the number of surgical procedures brought about by the recent introduction of general anaesthesia. By 1865 his continuing study of wound inflammation and the microbial studies of Pasteur had led him to institute in the operating theatre a regime of surgical antisepsis involving the use of a carbolic acid spray coupled with the sterilization of instruments, the site of operation and the hands of the operator. Increasingly it was appreciated that the air was the least important origin of infection, and by 1887 the antiseptic approach had been superseded by the aseptic.

In 1869 he succeeded Syme in the Chair at Edinburgh and his methods were widely accepted abroad. In 1877 he moved to the Chair of Surgery at King's College Hospital, London, in the hope of encouraging acceptance of his work in the metropolis. As well as developing a variety of new surgical procedures, he was engaged for many years in the development of surgical ligatures, which had always been a potent stimulant of infection. His choice of catgut as a sterilizable, absorbable material paved the way for major developments in this field. The Lister Institute of Preventive Medicine was named in his honour in 1903.

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SUBJECT AREA: Metallurgy

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After graduating from Columbia University in 1896. Monell became a metallurgical engineer to the Carnegie Steel Company, rising in six years to be Assistant to the President. In 1900, while Manager of the company's open-hearth steelworks at Pittsburg, he patented a procedure for making high-carbon steel in basic conditions on the hearth of a fixed/stationary furnace; the method was intended to refine pig-iron containing substantial proportions of phosphorus and to do so relatively quickly. The process was introduced at the Homestead Works of the Carnegie Steel Company in February 1900, where it continued in use for some years. In April 1902 Monell was among those who launched the International Nickel Company of New Jersey in order to bring together a number of existing nickel interests; he became the new company's President. In 1904–5, members of the company's metallurgical staff produced an alloy of about 70 parts nickel and 30 copper which seemed to show great commercial promise on account of its high resistance to corrosion and its good appearance. Monell agreed to the suggestion that the new alloy should be given his name; for commercial reasons it was marketed as "Monel metal". In 1917, following the entry of the USA into the First World War, Monell was commissioned Colonel in the US Army (Aviation) for overseas service, relinquishing his presidency of the International Nickel Company but remaining as a director. At the time of his death he was also a director in several other companies in the USA.

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See also: Stanley, Robert Crooks; Talbot, Benjamin

SUBJECT AREA: Telecommunications

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Following early education at Phillips Academy, Andover, at the age of 14 years Morse went to Yale College, where he developed interests in painting and electricity. Upon graduating in 1810 he became a clerk to a Washington publisher and a pupil of Washington Allston, a well-known American painter. The following year he travelled to Europe and entered the London studio of another American artist, Benjamin West, successfully exhibiting at the Royal Academy as well as winning a prize and medal for his sculpture. Returning to Boston and finding little success as a "historical-style" painter, he built up a thriving portrait business, moving in 1818 to Charleston, South Carolina, where three years later he established the (now defunct) South Carolina Academy of Fine Arts. In 1825 he was back in New York, but following the death of his wife and both of his parents that year, he embarked on an extended tour of European art galleries. In 1832, on the boat back to America, he met Charles T.Jackson, who told him of the discovery of the electromagnet and fired his interest in telegraphy to the extent that Morse immediately began to make suggestions for electrical communications and, apparently, devised a form of printing telegraph. Although he returned to his painting and in 1835 was appointed the first Professor of the Literature of Art and Design at the University of New York City, he began to spend more and more time experimenting in telegraphy. In 1836 he invented a relay as a means of extending the cable distance over which telegraph signals could be sent. At this time he became acquainted with Alfred Vail, and the following year, when the US government published the requirements for a national telegraph service, they set out to produce a workable system, with finance provided by Vail's father (who, usefully, owned an ironworks). A patent was filed on 6 October 1837 and a successful demonstration using the so-called Morse code was given on 6 January 1838; the work was, in fact, almost certainly largely that of Vail. As a result of the demonstration a Bill was put forward to Congress for $30,000 for an experimental line between Washington and Baltimore. This was eventually passed and the line was completed, and on 24 May 1844 the first message, "What hath God wrought", was sent between the two cities. In the meantime Morse also worked on the insulation of submarine cables by means of pitch tar and indiarubber.

With success achieved, Morse offered his invention to the Government for $100,000, but this was declined, so the invention remained in private hands. To exploit it, Morse founded the Magnetic Telephone Company in 1845, amalgamating the following year with the telegraph company of a Henry O'Reilly to form Western Union. Having failed to obtain patents in Europe, he now found himself in litigation with others in the USA, but eventually, in 1854, the US Supreme Court decided in his favour and he soon became very wealthy. In 1857 a proposal was made for a telegraph service across the whole of the USA; this was completed in just over four months in 1861. Four years later work began on a link to Europe via Canada, Alaska, the Aleutian Islands and Russia, but it was abandoned with the completion of the transatlantic cable, a venture in which he also had some involvement. Showered with honours, Morse became a generous philanthropist in his later years. By 1883 the company he had created was worth $80 million and had a virtual monopoly in the USA.

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SUBJECT AREA: Steam and internal combustion engines

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James Pickard, the Birmingham button maker, also owned a flour mill at Snow Hill, in 1780, where Matthew Wasborough installed one of his rotative engines with ratchet gear and a flywheel. In August 1780, Pickard obtained a patent (no. 1263) for an application to make a rotative engine with a crank as well as gearwheels, one of which was weighted to help return the piston in the atmospheric cylinder during the dead stroke and overcome the dead centres of the crank. Wasborough's flywheel made the counterweight unnecessary, and engines were built with this and Pickard's crank. Several Birmingham business people seem to have been involved in the patent, and William Chapman of Newcastle upon Tyne was assigned the sole rights of erecting engines on the Wasborough-Pickard system in the counties of Northumberland, Durham and York. Wasborough was building engines in the south until his death the following year. The patentees tried to bargain with Boulton \& Watt to exchange the use of the crank for that of the separate condenser, but Boulton \& Watt would not agree, probably because James Watt claimed that one of his workers had stolen the idea of the crank and divulged it to Pickard. To avoid infringing Pickard's patent, Watt patented his sun-and-planet motion for his rotative engines.

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SUBJECT AREA: Metallurgy

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Pliny was well educated in Rome, and for ten years or so followed a military career with which he was able to combine literary work, writing especially on historical subjects. He completed his duties c. 57 AD and concentrated on writing until he resumed his official career in 69 AD with administrative duties. During this last phase he began work on his only extant work, the thirty-seven "books" of his Historia Naturalis (Natural History), each dealing with a broad subject such as astronomy, geography, mineralogy, etc. His last post was the command of the fleet based at Misenum, which came to an end when he sailed too near Vesuvius during the eruption that engulfed Pompeii and he was overcome by the fumes.

Pliny developed an insatiable curiosity about the natural world. Unlike the Greeks, the Romans made few original contributions to scientific thought and observation, but some made careful compilations of the learning and observations of Greek scholars. The most notable and influential of these was the Historia Naturalis. To the ideas about the natural world gleaned from earlier Greek authors, he added information about natural history, mineral resources, crafts and some technological processes, such as the extraction of metals from their ores, reported to him from the corners of the Empire. He added a few observations of his own, noted during travels on his official duties. Not all the reports were reliable, and the work often presents a tangled web of fact and fable. Gibbon described it as an immense register in which the author has "deposited the discoveries, the arts, and the errors of mankind". Pliny was indefatigable in his relentless note-taking, even dictating to his secretary while dining.

During the Dark Ages and early Middle Ages in Western Europe, Pliny's Historia Naturalis was the largest known collection of facts about the natural world and was drawn upon freely by a succession of later writers. Its influence survived the influx into Western Europe, from the twelfth century, of translations of the works of Greek and Arab scholars. After the invention of printing in the middle of the fifteenth century, Pliny was the first work on a scientific subject to be printed, in 1469. Many editions followed and it may still be consulted with profit for its insights into technical knowledge and practice in the ancient world.

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SUBJECT AREA: Medical technology

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Following secondary education at Ashton-inMakerfield Grammar School, Randall entered Manchester University to read physics, gaining a first class BSc in 1925 and his MSc in 1926. From 1926 to 1937 he was a research physicist at the General Electric Company (GEC) laboratories, where he worked on luminescent powders, following which he became Warren Research Fellow of the Royal Society at Birmingham University, studying electronic processes in luminescent solids. With the outbreak of the Second World War he became an honorary member of the university staff and transferred to a group working on the development of centrimetric radar. With Boot he was responsible for the development of the cavity magnetron, which had a major impact on the development of radar.

When Birmingham resumed its atomic research programme in 1943, Randall became a temporary lecturer at the Cavendish Laboratory in Cambridge. The following year he was appointed Professor of Natural Philosophy at the University of St Andrews, but in 1946 he moved again to the Wheatstone Chair of Physics at King's College, London. There his developing interest in biophysical research led to the setting up of a multi-disciplinary group in 1951 to study connective tissues and other biological components, and in 1950– 5 he was joint Editor of Progress in Biophysics. From 1961 until his retirement in 1970 he was Professor of Biophysics at King's College and for most of that time he was also Chairman of the School of Biological Sciences. In addition, for many years he was honorary Director of the Medical Research Council Biophysics Research Unit.

After he retired he returned to Edinburgh and continued to study biological problems in the university zoology laboratory.

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SUBJECT AREA: Electricity, Metallurgy, Public utilities, Telecommunications

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Born Carl Wilhelm, he attended craft schools in Lübeck and Magdeburg, followed by an intensive course in natural science at Göttingen as a pupil of Weber. At the age of 19 Siemens travelled to England and sold an electroplating process developed by his brother Werner Siemens to Richard Elkington, who was already established in the plating business. From 1843 to 1844 he obtained practical experience in the Magdeburg works of Count Stolburg. He settled in England in 1844 and later assumed British nationality, but maintained close contact with his brother Werner, who in 1847 had co-founded the firm Siemens \& Halske in Berlin to manufacture telegraphic equipment. William began to develop his regenerative principle of waste-heat recovery and in 1856 his brother Frederick (1826–1904) took out a British patent for heat regeneration, by which hot waste gases were passed through a honeycomb of fire-bricks. When they became hot, the gases were switched to a second mass of fire-bricks and incoming air and fuel gas were led through the hot bricks. By alternating the two gas flows, high temperatures could be reached and considerable fuel economies achieved. By 1861 the two brothers had incorporated producer gas fuel, made by gasifying low-grade coal.

Heat regeneration was first applied in ironmaking by Cowper in 1857 for heating the air blast in blast furnaces. The first regenerative furnace was set up in Birmingham in 1860 for glassmaking. The first such furnace for making steel was developed in France by Pierre Martin and his father, Emile, in 1863. Siemens found British steelmakers reluctant to adopt the principle so in 1866 he rented a small works in Birmingham to develop his open-hearth steelmaking furnace, which he patented the following year. The process gradually made headway; as well as achieving high temperatures and saving fuel, it was slower than Bessemer's process, permitting greater control over the content of the steel. By 1900 the tonnage of open-hearth steel exceeded that produced by the Bessemer process.

In 1872 Siemens played a major part in founding the Society of Telegraph Engineers (from which the Institution of Electrical Engineers evolved), serving as its first President. He became President for the second time in 1878. He built a cable works at Charlton, London, where the cable could be loaded directly into the holds of ships moored on the Thames. In 1873, together with William Froude, a British shipbuilder, he designed the Faraday, the first specialized vessel for Atlantic cable laying. The successful laying of a cable from Europe to the United States was completed in 1875, and a further five transatlantic cables were laid by the Faraday over the following decade.

The Siemens factory in Charlton also supplied equipment for some of the earliest electric-lighting installations in London, including the British Museum in 1879 and the Savoy Theatre in 1882, the first theatre in Britain to be fully illuminated by electricity. The pioneer electric-tramway system of 1883 at Portrush, Northern Ireland, was an opportunity for the Siemens company to demonstrate its equipment.

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SUBJECT AREA: Metallurgy

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Thomas was educated at Dulwich College and from the age of 17, for the next twelve years, he made his living as a police-court clerk, although he studied chemistry in his spare time as an evening student at Birkbeck College, London. While there, he heard of the difficulties encountered by the Bessemer steelmaking process, which at that time was limited to using phosphorus-free iron. Any of this element present in the iron was oxidized to phosphoric acid, which would not react with the acidic lining in the converter, with the result that it would remain in the iron and render it too brittle to use. Unfortunately, phosphoric iron ores are more common than those free of this harmful element. Thomas was attracted by the view that a fortune awaited anyone who could solve this problem, and was not discouraged by the failure of several august figures in the industry, including Siemens and Lowthian Bell.

Thomas's knowledge of chemistry taught him that whereas an acidic lining allowed the phosphorus to remain in the iron, a basic lining would react with it to form part of the slag, which could then be tapped off. His experiments to find a suitable material were conducted in difficult conditions, in his spare time with meagre apparatus. Finally he found that a converter lined with dolomite, a form of limestone, would succeed, and he appealed to his cousin Percy Carlyle Gilchrist, Chemist at the Blaenavon Ironworks in Monmouthshire, for help in carrying out pilot-scale trials. In 1879 he gave up his police-court job to devote himself to the work, and in the same year they patented the Thomas- Gilchrist process. The first licence to use it was granted to Bolckow, Vaughan \& Co. of Middlesborough, and there the first steel was made in a basic Bessemer converter on 4 April 1879. The process was rapidly taken up and spread widely in Europe and beyond and was applied to other furnaces. Thomas made a fortune, but his health did not long allow him to enjoy it, for he died at the early age of 34.

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διαθήκη, ης, ἡ (Democr., Aristoph.+; ins, pap, LXX, En, TestSol, TestAbr, Test12Patr; ParJer 6:21; ApcEsdr, ApcMos; AssMos Fgm. a; Philo, Joseph., Just.; Mel., HE 4, 26, 14) apart from the simplex θήκη ‘case, chest’, for the mng. of this word one must begin with the mid. form of the verb διατίθεμαι, which is freq. used in legal and commercial discourse of disposition of things (s. L-S-J-M s.v. διατιθημι B), w. implication of promissory obligation. Disposition of one’s personal effects would naturally come under testamentary law, hence

① last will and testament (so exclusively in Hellenistic times, Eger [s. 3 below] 99 note; exx. e.g. in Riggenbach 292ff; Behm 10, 1; 2; Philo, Joseph., Test12Patr; loanw. in rabb.) Hb 9:16f; δ. κεκυρωμένη a will that has been ratified Gal 3:15; cp. 17, where δ. shades into mng. 2 (s. κυρόω 1, προκυρόω); s. also EBammel, below, and JSwetnam, CBQ 27, ’65, 373–90. On Jewish perspective s. RKatzoff, An Interpretation of PYadin 19—A Jewish Gift after Death: ProcXXCongPap 562–65.

② As a transl. of בְּרִית in LXX δ. retains the component of legal disposition of personal goods while omitting that of the anticipated death of a testator. A Hellenistic reader would experience no confusion, for it was a foregone conclusion that gods were immortal. Hence a δ. decreed by God cannot require the death of the testator to make it operative. Nevertheless, another essential characteristic of a testament is retained, namely that it is the declaration of one person’s initiative, not the result of an agreement betw. two parties, like a compact or a contract. This is beyond doubt one of the main reasons why the LXX rendered בְּרִית by δ. In the ‘covenants’ of God, it was God alone who set the conditions; hence covenant (s. OED s.v. ‘covenant’ sb. 7) can be used to trans. δ. only when this is kept in mind. So δ. acquires a mng. in LXX which cannot be paralleled w. certainty in extra-Biblical sources, namely ‘decree’, ‘declaration of purpose’, ‘set of regulations’, etc. Our lit., which is very strongly influenced by LXX in this area, seems as a rule to have understood the word in these senses (JHughes, NovT 21, ’79, 27–96 [also Hb 9:16–20; Gal 3:15–17]). God has issued a declaration of his purpose Ro 11:27 (Is 59:21); 1 Cl 15:4 (Ps 77:37); 35:7 (Ps 49:16), which God bears in mind (cp. Ps 104:8f; 105:45 al.) Lk 1:72; it goes back to ancestral days Ac 3:25 (PsSol 9:10; ParJer 6:21). God also issued an ordinance (of circumcision) 7:8 (cp. Gen 17:10ff). Since God’s holy will was set forth on more than one occasion (Gen 6:18; 9:9ff; 15:18; 17:2ff; Ex 19:5 and oft.), one may speak of διαθῆκαι decrees, assurances (cp. διαθῆκαι πατέρων Wsd 18:22; 2 Macc 8:15.—But the pl. is also used for a single testament: Diog. L. 4, 44; 5, 16. In quoting or referring to Theophr. sometimes the sing. [Diog. L. 5, 52; 56] is used, sometimes the pl. [5, 51; 57]) Ro 9:4; Eph 2:12. Much emphasis is laid on the δ. καινή, mentioned as early as Jer 38:31, which God planned for future disposition (Hb 8:8–10; 10:16). God’s decree or covenant directed toward the Christians is a καινὴ δ. (δ. δευτέρα Orig., C. Cels. 2, 75) Lk 22:20; 1 Cor 11:25; 2 Cor 3:6; Hb 8:8; 9:15a; PtK 2 p. 15, 5, or δ. νέα Hb 12:24; PtK 2 p. 15, 6 which, as a δ. αἰώνιος (cp. Jer 39:40; En 99:2) Hb 13:20, far excels 7:22; 8:6 the παλαιὰ δ. 2 Cor 3:14, or πρώτη δ. Hb 9:15b, with which it is contrasted. Both are mentioned (Did., Gen. 46, 4; 235, 26) Gal 4:24; B 4:6ff (Ex 34:28; 31:18; Just., D. 67, 9). Blood was shed when the old covenant was proclaimed at Sinai Hb 9:20 (Ex 24:8); the same is true of the new covenant Hb 10:29. τὸ αἷμά μου τ. διαθήκης Mt 26:28; Mk 14:24 (ELohse, Märtyrer u. Gottesknecht², ’63, 122–29) is prob. to be understood in connection w. this blood (s. WWrede, ZNW 1, 1900, 69–74; TRobinson, My Blood of the Covenant: KMarti Festschr. 1925, 232–37; for a critique of this view s. GWalther, Jesus, D. Passalamm des Neuen Bundes, ’50, 22–27 and JJeremias TLZ, ’51, 547. For Syriac background JEmerton, JTS 13, ’62, 111–17; s. also ÉDelebrecque, Études grecques sur l’vangile de Luc ’76, 109–21).—The v.l. Lk 22:29 may be derived from Jer 39:40 or Is 55:3 LXX (for the cognate acc. s. Aristoph., Aves 440).—δ. may also be transl. decree in the Ep. of Barnabas (4:6ff; 6:19; 9:6; 13:1, 6; 14:1ff δ. δοῦναί τινι); but the freq. occurrence of the idea of inheritance (6:19; 13:1, 6; 14:4f), makes it likely that the ‘decree’ is to be thought of as part of a will.

③ The mng. compact, contract seems firmly established for Gr-Rom. times (FNorton, A Lexicographical and Historical Study of Διαθήκη, Chicago 1908, 31ff; EBruck, D. Schenkung auf d. Todesfall im griech. u. röm. Recht I 1909, 115ff; JWackernagel, D. Kultur d. Gegenw. I 8² 1907, 309). It remains doubtful whether this mng. has influenced our lit. here and there (exc. quite prob. Lk 22:29 v.l. with its administrative tenor; the phrase διατίθεμαι δ. as Aristoph., Av. 440 of a treaty agreement), but the usage of the term δ. in such sense would again serve as a bridge to LXX usage.—The expr. ἡ κιβωτὸς τ. διαθήκης covenant chest i.e. the sacred box (Eng. ‘ark’ as loanw. from Lat. arca) that symbolized God’s pledge of presence w. Israel (Ex 31:7; 39:14 al.) Hb 9:4; Rv 11:19 or αἱ πλάκες τ. διαθ. (Ex 34:28; Dt 9:9, 11) Hb 9:4 would have required some acquaintance with Israelite tradition on the part of ancient readers.—ERiggenbach, D. Begriff d. Διαθήκη im Hb: Theol. Stud. f. TZahn 1908, 289ff, Hb² 1922, 205ff al.; ACarr, Covenant or Testament?: Exp. 7th ser., 7, 1909, 347ff; JBehm, D. Begriff D. im NT 1912; ELohmeyer, Diatheke 1913; WFerguson, Legal Terms Common to the Macedonian Inscr. and the NT, 1913, 42–46 (testamentary exhibits); HKennedy, Exp. 8th ser., 10, 1915, 385ff; GVos, Hebrews, the Epistle of the Diatheke: PTR 13, 1915, 587–632; 14, 1916, 1–61; OEger, ZNW 18, 1918, 84–108; EBurton, ICC Gal 1921, 496–505; LdaFonseca, Διαθήκη foedus an testamentum?: Biblica 8, 1927; 9, 1928; EBammel, Gottes διαθήκη (Gal 3:15–17) u. d. jüd. Rechtsdenken, NTS 6, ’60, 313–19; NDow, A Select Bibliography on the Concept of Covenant, Austin Seminary Bulletin 78, 6, ’63; CRoetzel, Biblica 51, ’70, 377–90 (Ro 9:4); DMcCarthy, Berit and Covenant (Deut.), ’72, 65–85; EChristiansen, The Covenant in Judaism and Paul ’95.—DELG s.v. θήκη. M-M. TW. Sv.

λόγος, ου, ὁ (verbal noun of λέγω in the sense ‘pick’; Hom.+).

① a communication whereby the mind finds expression, word

ⓐ of utterance, chiefly oral.

α. as expression, word (oratorical ability plus exceptional performance were distinguishing marks in Hellenic society, hence the frequent association of λ. and ἔργον ‘deed’; a sim. formulation as early as Il. 9, 443 μύθων τε ῥητῆρʼ ἔμεναι πρηκτῆρά τε ἔργων; Polystrat. p. 33 μὴ λόγῳ μόνον ἀλλʼ ἔργω; Just., A II, 4, 2 ἢ λόγῳ ἢ ἔργῳ and D. 35, 7 λόγον ἢ πρᾶξιν) δυνατὸς ἐν ἔργῳ κ. λόγῳ, i.e. an exceptional personage Lk 24:19; pl. of Moses Ac 7:22 (the contrast expressed w. a verb Choix 20, 6–8 ποιεῖ ἀγαθὸν ὄτι δύναται καὶ λόγῳ καὶ ἔργῳ of Apollordorus, a benefactor in Cyzicus, a flourishing city in Phrygia; sim. New Docs 7, 233, no. 10, 8f πολιτευόμενος … λόγῳ καὶ ἔργῳ; cp. IKourion 32, 8; without contrast Diod S 13, 101, 3 ἄνδρας λόγῳ δυνατούς; for sim. constructions using λέγω and πράσσω s. Danker, Benefactor 339–43). Cp. Ro 15:18; 2 Cor 10:11; Col 3:17; 2 Th 2:17; Hb 13:21 v.l.; 1J 3:18 (cp. Theognis 1, 87f Diehl³ μή μʼ ἔπεσιν μὲν στέργε κτλ.—For the contrast λόγῳ … ἀληθείᾳ cp. Diod S 13, 4, 1). In contrast to a sinful deed we also have the λόγος ἁμαρτίας sinful word Judaicon 172, 9. W. γνῶσις: ἐν παντὶ λόγῳ κ. πάσῃ γνώσει 1 Cor 1:5. ἰδιώτης τῷ λόγῳ, ἀλλʼ οὐ τῇ γνώσει 2 Cor 11:6. (Opp. δύναμις ‘revelation of power’) 1 Cor 4:19, 20. τὸ εὐαγγέλιον οὐκ ἐγενήθη ἐν λόγῳ μόνον, ἀλλὰ καὶ ἐν δυνάμει 1 Th 1:5 (cp. Ar. 13, 7 of mythical accounts οὐδέν εἰσιν εἰ μὴ μόνον λόγοι ‘they’re nothing but words’). W. ἐπιστολή: 2 Th 2:2, 15. W. ἀναστροφή: 1 Ti 4:12; 1 Pt 3:1b. Opp. ‘be silent’: IRo 2:1.—μόνον εἰπὲ λόγῳ just say the word Mt 8:8; cp. Lk 7:7 (Ath. 17, 1 ὡς λόγῳ εἰπεῖν; 29, 2; Phalaris, Ep. 121, 1 λόγῳ λέγειν; cp. schol. on Pla. 341a ἐν λόγῳ μόνον εἰπεῖν). οὐδεὶς ἐδύνατο ἀποκριθῆναι αὐτῷ λόγον no one was able to answer him a (single) word Mt 22:46; cp. 15:23 (cp. TestAbr A 16 p. 98, 11 [Stone p. 44] οὐκ ἀπεκρίθη αὐτῷ λόγον).— The (mighty) word (of one who performs miracles) ἐξέβαλεν τὰ πνεύματα λόγῳ Mt 8:16 (a rare use of λ. as ‘single utterance’, s. L-S-J-M s.v. VII).—διὰ λόγου by word of mouth (opp. ‘by letter’) Ac 15:27.—In the textually uncertain pass. Ac 20:24 the text as it stands in N., οὐδενὸς λόγου (v.l. λόγον) ποιοῦμαι τὴν ψυχὴν τιμίαν, may well mean: I do not consider my life worth a single word (cp. λόγου ἄξιον [ἄξιος 1a] and our ‘worth mention’; s. Conzelmann ad loc.).

β. The expression may take on a variety of formulations or topical nuances: what you say Mt 5:37; statement (PGM 4, 334) Lk 20:20; question (Sext. Emp., Math. 8, 295; 9, 133; Diog. L. 2, 116) ἐρωτήσω ὑμᾶς λόγον I will ask you a question (cp. TestJob 36:5; GrBar 5:1; ApcSed 13:6; Jos., Ant. 12, 99) Mt 21:24; cp. Mk 11:29; Lk 20:3; prayer (PGM 1, 25; 4, 90; 179; 230 al.; 5, 180; 196 al.) Mt 26:44; Mk 14:39. ἡγούμενος τοῦ λ. principal speaker Ac 14:12. W. epexeget. gen. λ. παρακλήσεως 13:15. W. κήρυγμα our manner of presentation and our proclamation 1 Cor 2:4a (but s. comm.). (W. διδασκαλία) preaching 1 Ti 5:17; prophecy (Biogr. p. 364 [Pythia]) J 2:22; 18:32. Command (Aeschyl., Pers. 363) Lk 4:36; 2 Pt 3:5, 7; via a letter 2 Th 3:14. Report, story (X., An. 1, 4, 7; Diod S 3, 40, 9; 19, 110, 1 λ. διαδιδόναι=spread a report; Appian, Iber. 80 §346, Maced. 4 §1 [both=rumor]; Diod S 32, 15, 3 ἦλθεν ὁ λ. ἐπί τινα=the report came to someone; Arrian, Anab. 7, 22, 1 λόγος λέγεται τοιόσδε=a story is told like this, Ind. 9, 2; Diod S 3, 18, 3 λ.=story, account; Jos., Ant. 19, 132; Tat. 27, 2 τοῦ καθʼ Ἡρακλέα λόγου) Mt 28:15; Mk 1:45; Lk 5:15 (λ. περί τινος as X., An. 6, 6, 13; Jos., Ant. 19, 127) 7:17; J 21:23. ἠκούσθη ὁ λόγος εἰς τὰ ὦτα τ. ἐκκλησίας the report came to the ears of the assembly in Jerusalem Ac 11:22. λόγον ἔχειν σοφίας have the appearance of wisdom, pass for wisdom Col 2:23 (cp. Pla., Epinomis 987b ἔχει λόγον; Demosth., C. Lept. 462 [20, 18] λόγον τινʼ ἔχον; but mng. 2f is possible). Proverb (Pla., Phdr. 17, 240c, Symp. 18, 195b, Gorg. 54, 499c, Leg. 6, 5, 757a; Socrat., Ep. 22, 1) J 4:37 (Ps.-Callisth. 1, 13, 7 ἀληθῶς ἐν τούτῳ ὁ λ. foll. by a proverb). Proclamation, instruction, teaching, message Lk 4:32; 10:39; J 4:41; 17:20; Ac 2:41; 4:4; 10:44; 20:7; 1 Cor 1:17; 2:1. In Ac18:15 ζητήματα περὶ λόγου καὶ ὀνομάτων καὶ νόμου the sense appears to be someth. like this: controversial issues involving disputes about words and your way of life with λ. prob. referring to the presentation of controversial subjects, which in turn arouses heated ζητήματα debates. λόγος σοφίας proclamation of wisdom, speaking wisely 1 Cor 12:8a (Ps.-Phoc. 129 τῆς θεοπνεύστου σοφίης λ.); corresp. λ. γνώσεως vs. 8b. Cp. 14:9; 15:2; 2 Cor 1:18; 6:7; 10:10. λ. μαρτυρίας word of witness Rv 12:11. ὁ κατὰ τ. διδαχὴν πιστὸς λ. the message of faith, corresponding to the teaching Tit 1:9; the opp. 2 Ti 2:17. A speech (Aristot. p. 14b, 2; Diod S 40, 5a) διὰ λόγου πολλοῦ in a long speech Ac 15:32; cp. 20:2. λ. κολακείας flattering speech 1 Th 2:5. Speaking gener. 2 Cor 8:7; Eph 6:19; Col 4:6; D 2:5. ἐν λόγῳ πταίειν make a mistake in what one says Js 3:2.—Of God’s word, command, commission (LXX; ParJer 5:19 κατηχῆσαι αὐτοὺς τὸν λόγον; SyrBar 13:2; ApcSed 14:10; Just., D. 84, 2; Ael. Aristid. hears a ἱερὸς λ. at night fr. a god: 28, 116 K.=49, p. 529 D.; Sextus 24) ἠκυρώσατε τ. λόγον τοῦ θεοῦ Mt 15:6 (v.l. νόμον, ἐντολήν); cp. Mk 7:13.—J 5:38; 8:55; 10:35; Ro 3:4 (Ps 50:6). Of God’s promise Ro 9:6, 9 (but these two vss., and Gal 5:14 below, prob. fit better under 2a), 28 (Is 10:22f). Cp. Hb 2:2; 4:2 (s. ἀκοή 4b); 7:28; 12:19. For B 15:1 see 1aδ. The whole law (as the expr. εἴ τι ἑτέρα ἐντολή indicates not limited to a narrow list of commandments), acc. to Ro 13:9. In what is prob. a play on words (s. 2a and b), Gal 5:14 (s. 2a below) is summed up in the λόγος as expressed in Lev 19:18.—That which God has created ἁγιάζεται διὰ λόγου θεοῦ 1 Ti 4:5; in line w. the context, this hardly refers to God’s creative word (so SibOr 3, 20; PtK 2; πάντα γὰρ λόγῳ ποιήσας ὁ θεός Theoph. Ant. 2, 18 [144, 8]), but to table prayers which use biblical expressions. The divine word as judge of thoughts Hb 4:12. τελεσθήσονται οἱ λ. τοῦ θεοῦ Ac 17:17; cp. 19:9.—Of the divine revelation through Christ and his messengers (Just., A I, 61, 9 λόγον … παρὰ τῶν ἀποστόλων ἐμάθομεν τοῦτον) θεὸς ἐφανέρωσεν τὸν λ. αὐτοῦ ἐν κηρύγματι Tit 1:3. δέδωκα αὐτοῖς τὸν λ. σου J 17:14; cp. vss. 6, 17; 1J 1:10; 2:14. ἵνα μὴ ὁ λ. τοῦ θεοῦ βλασφημῆται Tit 2:5. The apostles and other preachers, w. ref. to the λόγος of God, are said to: λαλεῖν Ac 4:29, 31; 13:46; Phil 1:14; Hb 13:7; καταγγέλλειν Ac 13:5; 17:13; διδάσκειν 18:11; μαρτυρεῖν Rv 1:2. Of their hearers it is said: τὸν λ. τοῦ θεοῦ ἀκούειν Ac 13:7; δέχεσθαι 8:14; 11:1. Of the λ. τοῦ θεοῦ itself we read: ηὔξανεν Ac 6:7; 12:24; 19:20; οὐ δέδεται 2 Ti 2:9. In these places and many others ὁ λόγος τοῦ θεοῦ is simply the Christian message, the gospel: Lk 5:1; 8:11, 21; 11:28 (Simplicius in Epict. p. 1, 20 μὴ μόνον ἀκουόντων ἀλλὰ πασχόντων καὶ ὑπὸ τῶν λόγων=let the message have its effect on oneself); Ac 6:2 (s. καταλείπω 7c; for prob. commercial metaph. s. 2a below); 13:44 v.l. (for κυρίου); 16:32 v.l.; 1 Cor 14:36; 2 Cor 2:17; 4:2; Col 1:25; 1 Pt 1:23; Rv 1:9; 6:9; 20:4; IPhld 11:1. Cp. 1 Th 2:13ab; 1J 2:5.—Since this ‘divine word’ is brought to humanity through Christ, his word can be used in the same sense: ὁ λόγος μου J 5:24; cp. 8:31, 37, 43, 51f; 12:48; 14:23f; 15:3, 20b; Rv 3:8. ὁ λόγος τοῦ Χριστοῦ Col 3:16; cp. Hb 6:1. ὁ λ. τοῦ κυρίου Ac 8:25; 12:24 v.l.; 13:44, 48f; 14:25 v.l.; 15:35, 36; 16:32 (cp. λ. θεοῦ); 19:10; 1 Th 1:8; 2 Th 3:1. Pl. Mk 8:38 (Lk 9:26); 1 Ti 6:3; cp. Lk 24:44; s. also 1aδ.—Or it is called simply ὁ λόγος=the ‘Word’, for no misunderstanding would be possible among Christians: Mt 13:20–23; Mk 2:2; 4:14–20, 33; 8:32 (s. 1aε below); 16:20; Lk 1:2; 8:12f, 15; Ac 6:4; 8:4; 10:36 (on the syntax s. FNeirynck, ETL 60, ’84, 118–23); 11:19; 14:25 (cp. λ. κυρίου above); 16:6; 17:11; 18:5; Gal 6:6; Phil 1:14; Col 4:3; 1 Th 1:6; 2 Ti 4:2; Js 1:21ff; 1 Pt 2:8; 3:1; 1J 2:7; AcPl Ha 7, 6 (so also Mel., HE 4, 26, 13; Ath. 2, 3).—Somet. the ‘Word’ is more closely defined by a gen.: ὁ λ. τῆς βασιλείας the word of the reign/rule (of God) Mt 13:19. τῆς σωτηρίας Ac 13:26. τῆς καταλλαγῆς 2 Cor 5:19. τοῦ σταυροῦ 1 Cor 1:18. δικαιοσύνης (q.v. 3a) Hb 5:13. ζωῆς Phil 2:16. (τῆς) ἀληθείας (Theoph. Ant. 3, 4 [p. 212, 2]; cp. περὶ ἀληθείας Hippol., Ref. 10, 6, 1) Eph 1:13; Col 1:5; 2 Ti 2:15; Js 1:18; AcPl Ha 8, 8 (Just., D. 121, 2). τῆς χάριτος αὐτοῦ (=τοῦ κυρίου) Ac 14:3; 20:32. (Differently the pl. οἱ λόγοι τ. χάριτος gracious words Lk 4:22; cp. Marcellinus, Vi. Thu. 57 Hude λόγοι εἰρωνείας.) ὁ λ. τοῦ εὐαγγελίου Ac 15:7; ὁ τοῦ Χριστιανισμοῦ λ. MPol 10:1. In Rv 3:10 the gospel is described by the ‘One who has the key of David’ as ὁ λ. τῆς ὑπομονῆς μου my word of endurance (W-S. §30, 12c). λ. τῶν ὑ[πο]μονῶν AcPl Ha 6, 11. παρελάβετε τὸν λ. ὅτι AcPl Ha 8, 25.—The pastoral letters favor the expr. πιστὸς ὁ λόγος (sc. ἐστίν, and s. πιστός 1b) 1 Ti 1:15; 3:1; 4:9; 2 Ti 2:11; Tit 3:8; cp. Rv 21:5; 22:6. λ. ὑγιής sound preaching Tit 2:8; cp. the pl. ὑγιαίνοντες λόγοι 2 Ti 1:13 (on medicinal use of words for the mind or soul s. VLeinieks, The City of Dionysos ’96, 115–22, on Eur.).—The pl. is also used gener. of Christian teachings, the words of the gospel Lk 1:4 (s. κατηχέω 2a); 1 Th 4:18. οἱ λ. τῆς πίστεως 1 Ti 4:6. On λόγοι κυριακοί for λόγια κυριακά in the title of the Papias document s. ἐξήγησις 2.—JSchniewind, Die Begriffe Wort und Evangelium bei Pls, diss. Bonn 1910; RAsting (εὐαγγέλιον, end).

γ. of an individual declaration or remark: assertion, declaration, speech ἀκούσαντες τὸν λ. when they heard the statement Mt 15:12; cp. 19:11, 22; 22:15; Mk 5:36. διὰ τοῦτον τὸν λ. because of this statement of yours 7:29 (TestAbr A 15 p. 95, 29 [Stone p. 38] τὸν λ. τοῦτον; ApcMos 25 εἰς τὸν λόγον σου κρινῶ σε). Cp. 10:22; 12:13; Lk 1:29; 22:61 v.l. (for ῥήματος); J 4:39, 50; 6:60; 7:36, 40 v.l.; 15:20a; 18:9; 19:8; Ac 6:5; 7:29; 20:38; 22:22; 1 Th 4:15. ὸ̔ς ἐὰν εἴπῃ λόγον κατὰ τοῦ υἱοῦ τοῦ ἀνθρώπου whoever utters a (defamatory) word against the Son of Humanity Mt 12:32 (λ. εἰπεῖν κατά τινος as Jos., Ant. 15, 81); cp. Lk 12:10. λόγος σαπρός unwholesome talk Eph 4:29. λόγον ποιεῖσθαι make a speech Ac 11:2 D (cp. Hyperid. 3, 20; Jos., Ant. 11, 86).

δ. the pl. (οἱ) λόγοι is used, on the one hand, of words uttered on various occasions, of speeches or instruction given here and there by humans or transcendent beings (TestAbr A 14 p. 94, 19 [Stone p. 36]; Jos., Ant. 4, 264; Just., D. 100, 3) ἐκ τῶν λόγων σου δικαιωθήσῃ (καταδικασθήσῃ) Mt 12:37ab; 24:35; Mk 13:31; Lk 21:33; Ac 2:40; 7:22 (ἐν λόγοις καὶ ἔργοις αὐτοῦ. On the word-deed pair cp. Dio Chrys. 4, 6 the λόγοι and ἔργα of Diogenes; s. α above). οἱ δέκα λόγοι the ten commandments (Ex 34:28; Dt 10:4; Philo, Rer. Div. Her. 168, Decal. 32; Jos., Ant. 3, 138; cp. 91f; Did., Gen. 36, 10) B 15:1. Ac 15:24; 20:35; 1 Cor 2:4b, 13; 14:19ab; κενοὶ λ. Eph 5:6; AcPl Ox 6, 13 (cp. Aa 1, 241, 14); Dg 8:2; πλαστοὶ λ. 2 Pt 2:3. λ. πονηροί 3J 10.—Also of words and exprs. that form a unity, whether it be connected discourse (Jos., Ant. 15, 126; Just., A II, 12, 6, D. 11, 5; 81, 3 al.), a conversation, or parts of one and the same teaching, or expositions on the same subject (Diod S 16, 2, 3 μετέσχε τῶν Πυθαγορίων λόγων; Dio Chrys. 37 [54], 1; Ael. Aristid. 50, 55 K.=26 p. 519 D.: οἱ Πλάτωνος λόγοι; PsSol 17:43 [words of the Messiah]; AscIs 3:12 οἱ λόγοι τοῦ Βελχειρά) πᾶς ὅστις ἀκούει μου τοὺς λόγους τούτους Mt 7:24; cp. vss. 26, 28; 10:14; 19:1; 26:1; Mk 10:24; Lk 1:20; 6:47; 9:28, 44. ἐπηρώτα αὐτὸν ἐν λόγοις ἱκανοῖς he questioned him at some length 23:9. τίνες οἱ λ. οὗτοι οὓς ἀντιβάλλετε; what is this conversation that you are holding? 24:17; J 7:40 (s. γ); 10:19; J 14:24a; 19:13; Ac 2:22; 5:5, 24; 16:36; 2 Ti 4:15; 1 Cl 13:1; 46:7. λόγοις φθοριμαίοις AcPlCor 1:2.

ε. the subject under discussion, matter, thing gener. (Theognis 1055 Diehl; Hdt. 8, 65 μηδενὶ ἄλλῳ τὸν λόγον τοῦτον εἴπῃς. Cp. Hebr. דָּבָר) τὸν λ. ἐκράτησαν they took up the subject Mk 9:10; cp. Mt. 21:24 (s. 1aβ beg.). οὐκ ἔστιν σοι μερὶς ἐν τῷ λόγῳ τούτῳ you have no share in this matter Ac 8:21. ἰδεῖν περὶ τ. λόγου τούτου look into this matter 15:6. ἔχειν πρός τινα λόγον have a complaint against someone (cp. Demosth. 35, 55 ἐμοὶ πρὸς τούτους ὁ λόγος; PIand 16, 3 δίκαιον λόγον ἔχει πρὸς σέ) 19:38. παρεκτὸς λόγου πορνείας Mt 5:32; 19:9 v.l. (2d is also prob.).—Perh. also Mk 8:32 he discussed the subject quite freely (but s. 1aβ above).

ⓑ of literary or oratorical productions: of the separate books of a work (Hdt. 5, 36 ἐν τῷ πρώτῳ τ. λόγων; Pla., Parmen. 2, 127d ὁ πρῶτος λόγος; Philo, Omn. Prob. Lib. 1 ὁ μὲν πρότερος λόγος ἦν ἡμῖν, ὦ Θεόδοτε, περὶ τοῦ …) treatise Ac 1:1 (s. on the prologue to Ac: AHilgenfeld, ZWT 41, 1898, 619ff; AGercke, Her 29, 1894, 373ff; RLaqueur, Her 46, 1911, 161ff; Norden, Agn. Th. 311ff; JCreed, JTS 35, ’34, 176–82; Goodsp., Probs. 119–21). Παπίας … πέντε λόγους κυριακῶν λογίων ἔγραψεν Papias (11:1; cp. 3:1 e; 11:2; 12:2).—περὶ οὗ πολὺς ἡμῖν ὁ λόγος about this we have much to say Hb 5:11. Hb is described as ὁ λ. τῆς παρακλήσεως a word of exhortation (in literary form) 13:22. Of writings that are part of Holy Scripture ὁ λ. Ἠσαί̈ου J 12:38. ὁ λ. ὁ ἐν τῷ νόμῳ γεγραμμένος 15:25; ὁ προφητικὸς λ. 2 Pt 1:19; 2 Cl 11:2 (quot. of unknown orig.); AcPl Ha 8, 27/BMM recto 35 (Just., D. 77, 2 al.). ὁ ἅγιος λ. the holy word 1 Cl 56:3. ὁ λ. ὁ γεγραμμένος 1 Cor 15:54 (Is 25:8 and Hos 13:14 follow). Pl. οἱ λόγοι τ. προφητῶν Ac 15:15. ὡς γέγραπται ἐν βίβλῳ λόγων Ἠσαί̈ου Lk 3:4 (Pla., 7th Epistle 335a πείθεσθαι ἀεὶ χρὴ τοῖς παλαιοῖς καὶ ἱεροῖς λόγοις; TestJob 1:1 βίβλος λόγων Ἰώβ; ParJer 9:32 v.l. τὰ λοιπὰ τῶν λόγων Ἱερεμίου; ApcEsdr 1:1 καὶ ἀποκάλυψις τοῦ … Ἐσδράμ; ApcSed prol.; Just., D. 72, 3f).—Of the content of Rv: ὁ ἀναγινώσκων τ. λόγους τῆς προφητείας 1:3. οἱ λόγοι (τ. προφητείας) τ. βιβλίου τούτου 22:7, 9f, 18f.

② computation, reckoning

ⓐ a formal accounting, esp. of one’s actions, and freq. with fig. extension of commercial terminology account, accounts, reckoning λόγον δοῦναι (Hdt. 8, 100; X., Cyr. 1, 4, 3; Diod S 3, 46, 4; SIG 1099, 16; BGU 164, 21; Jos., Ant. 16, 120; Just., D. 115, 6) give account, make an accounting ἕκαστος περὶ ἑαυτοῦ λόγον δώσει τ. θεῷ Ro 14:12. Also λ. ἀποδοῦναι abs. (Just., D. 116, 1 al.; Diod S 16, 56, 4; 19, 9, 4) Hb 13:17. τινί to someone (Diod S 16, 27, 4; Plut., Alcib. 7, 3; Chariton 7, 6, 2; SIG 631, 13 τᾷ πόλει; 2 Ch 34:28; Da 6:3 Theod.; Jos., Bell. 1, 209) τῷ ἑτοίμως ἔχοντι κρῖναι 1 Pt 4:5. τινὸς of someth. (SIG 1044, 46; 1105, 10 τοῦ ἀναλώματος; Jos., Ant. 19, 307) Lk 16:2 (here λ. w. the art.; on the subject of undergoing an audit cp. Aeschin. 3, 22). Likew. περί τινος (Diod S 18, 60, 2 δοὺς αὑτῷ περὶ τούτων λόγον=taking account [considering] with himself; BGU 98, 25 περὶ τούτου) Mt 12:36; Ac 19:40. ὑπέρ τινος concerning someone Hv 3, 9, 10.—αἰτεῖν τινα λόγον περί τινος call someone to account for someth. 1 Pt 3:15 (cp. Pla., Pol. 285e; Dio Chrys. 20 [37], 30; Apc4Esdr Fgm. b ἕκαστος ὑπὸ τοῦ οἰκείου ἔργου τὸν λόγον ἀπαιτηθήσεται; Just., A I, 17, 4. For another perspective s. d below.).—Of banking responsibility ὁ λόγος τοῦ θεοῦ (PStras 72, 10 [III A.D.] ὁ τῶν θεῶν λ.; PHerm 108 [III A.D.] λ. τοῦ Σαραπείου) in wordplay Ac 6:2 (w. τράπεζα q.v. 1c); s. also 1aβ.—Of a ledger heading (POxy 1333 [II/III A.D.] δὸς αὐτῳ λόγῳ θεωρικῶν=credit him under ‘festivals’; for others s. Preisig., Wörterbuch s.v. λ. 14; s. also Fachwörter 119) Ro 9:6 (the point is that God’s ‘list’ of Israelites is accurate; on ἐκπίπτω in the sense ‘is not deficient’ s. s.v. 4); vs. 9 (the ‘count’ is subsumed by metonymy in divine promise); Gal 5:14 (all moral obligations come under one ‘entry’: ‘you shall love your neighbor as yourself’; for commercial association of ἀναλίσκω vs. 15, which rounds out the wordplay, s. s.v.). The contexts of these three passages suggest strong probability for commercial associations; for another view s. 1aβ.

ⓑ settlement (of an account) (εἰς λόγον commercial t.t. ‘in settlement of an account’ POxy 275, 19; 21) εἰς λόγον δόσεως κ. λήμψεως in settlement of a mutual account (lit., ‘of giving and receiving’, ‘of debit and credit’) Phil 4:15 (cp. Plut., Mor. 11b λόγον δοῦναι καὶ λαβεῖν; a parallel formulation POxy 1134,10 [421 A.D.] λ. λήμματος καὶ ἐξοδιασμοῦ=ledger of income and expenditures); for the linked accounting terms δόσις and λήμψις s. PCairMasp 151, 208 [VI A.D.]. The same ideas are in the background of εἰς λόγον ὑμῶν credited to your account vs 17.—συναίρειν λόγον settle accounts (BGU 775, 18f. The mid. in the same mng. PFay109, 6 [I A.D.]; POxy 113, 27f.—Dssm., LO 94 [LAE 118f]) μετά τινος Mt 18:23; 25:19.

ⓒ reflection, respect, regard εἰς λόγον τινός with regard to, for the sake of (Thu. 3, 46, 4; Demosth. 19, 142 εἰς ἀρετῆς λόγον; Polyb. 11, 28, 8; Ath. 31, 1; Ael. Aristid. 39 p. 743 D.: εἰς δεινότητος λ.) εἰς λ. τιμῆς IPhld 11:2. εἰς λ. θεοῦ ISm 10:1.

ⓓ reason for or cause of someth., reason, ground, motive (Just., D. 94, 3 δότε μοι λόγον, ὅτου χάριν … ; Ath. 30, 3 τὶς γὰρ … λόγος; Dio Chrys. 64 [14], 18 ἐκ τούτου τ. λόγου; Appian, Hann. 29 §126 τῷ αὐτῷ λόγῳ; Iambl., Vi. Pyth. 28, 155) τίνι λόγω; for what reason? Ac 10:29 (cp. Pla., Gorg. 512c τίνι δικαίῳ λ.; Appian, Mithrid. 57 §232 τίνι λόγῳ;). λόγον περὶ τῆς ἐν ὑμῖν ἐλπίδος 1 Pt 3:15 (but s. a above); κατὰ λόγον Ac 18:14 (s. κατά B 5bβ). παρεκτὸς λόγου πορνείας Mt 5:32; 19:9 v.l. (though 1aε is also poss.).

ⓔ πρὸς ὸ̔ν ἡμῖν ὁ λόγος (ἐστίν) with whom we have to do (i.e. to reckon) (Dio Chrys. 31, 123; other exx. in FBleek, Hb II/1, 1836, 590ff), in his capacity as judge (Libanius, Legat. Ulixis [=Declamatio IV] 2 F. τοῖς δὲ ἀδίκως ἀποκτενοῦσι καὶ πρὸς θεοὺς καὶ πρὸς ἀνθρώπους ὁ λόγος γίγνεται) Hb 4:13. οὐ πρὸς σάρκα ὁ λόγος, ἀλλὰ πρὸς θεόν he has to do not with flesh, but with God IMg 3:2.

ⓕ In Col 2:23 (s. 1aβ) λόγον μὲν ἔχοντα σοφίας may= make a case for wisdom (cp. λόγος ἡμῖν οὐδείς Plut., Mor. 870b).

③ the independent personified expression of God, the Logos. Our lit. shows traces of a way of thinking that was widespread in contemporary syncretism, as well as in Jewish wisdom lit. and Philo, the most prominent feature of which is the concept of the Logos, the independent, personified ‘Word’ (of God): GJs 11:2 (word of the angel to Mary) συνλήμψῃ ἐκ Λόγου αὐτοῦ (sc. τοῦ πάντων Δεσπότου). J 1:1abc, 14 (cp. Just., A I, 23, 2; Mel., P. 9, 61 and oft. by all apolog., exc.. Ar.). It is the distinctive teaching of the Fourth Gospel that this divine ‘Word’ took on human form in a historical person, that is, in Jesus (s. RSeeberg, Festgabe für AvHarnack ’21, 263–81.—Λόγος w. ζωή in gnostic speculation: Iren.1, 1, 1 [Harv. 1, 10, 4]; Aelian, VH 4, 20 ἐκάλουν τὸν Πρωταγόραν Λόγον. Similarly Favorinus [II A.D.]: Vorsokr. 80 A 1 ln. 22 [in Diog. L. 9, 50] of Democritus: ἐκαλεῖτο Σοφία. Equating a divinity with an abstraction that she personifies: Artem. 5, 18 φρόνησις εἶναι νομίζεται ἡ θεός [Athena]). Cp. 1J 1:1; Rv 19:13. εἷς θεός ἐστιν, ὁ φανερώσας ἑαυτὸν διὰ Ἰ. Χριστοῦ τοῦ υἱοῦ αὐτοῦ, ὅς ἐστιν αὐτοῦ λόγος, ἀπὸ σιγῆς προελθών there is one God, who has revealed himself through Jesus Christ his Son, who is his ‘Word’ proceeding from silence (i.e., without an oral pronouncement: in a transcendent manner) IMg 8:2 (s. σιγή). The Lord as νόμος κ. λόγος PtK 1. Cp. Dg 11:2, 3, 7, 8; 12:9.—HClavier, TManson memorial vol., ’59, 81–93: the Alexandrian eternal λόγος is also implied in Hb 4:12; 13:7.—S. also the ‘Comma Johanneum’ (to the bibliography in RGG³ I, ’54 [HGreeven] add AJülicher, GGA 1905, 930–35; AvHarnack, SBBerlAk 1915, 572f [=Studien I ’31, 151f]; MMeinertz, Einl. in d. NT⁴ ’33, 309–11; AGreiff, TQ 114, ’33, 465–80; CDodd, The Joh. Epistles ’46; WThiele, ZNW 50, ’59, 61–73) ὁ πατήρ, ὁ λόγος καὶ τὸ ἅγιον πνεῦμα 1J 5:7 v.l. (s. N. app.; Borger, TRu 52, ’87, 57f). (Such interpolations were not unheard of. According to Diog. L. 1, 48 some people maintain that Solon inserted the verse mentioning the Athenians after Il. 2, 557.—τῆς τριάδος, τοῦ θεοῦ καὶ τοῦ λόγου αὐτοῦ καὶ τῆς σοφίας αὐτοῦ Theoph. Ant. 2, 15 [p. 138, 19].)—On the Logos: EZeller, D. Philosophie der Griechen III 2⁴ 1903, 417–34; MHeinze, D. Lehre v. Logos in d. griech. Philosophie 1872; PWendland, Philo u. d. kynisch-stoische Diatribe (Beiträge z. Gesch. der griech. Philosophie u. Religion by Wendl. and OKern 1895, 1–75); AAall, Gesch. d. Logosidee 1896, 1899; MPohlenz, D. Stoa ’48f, I 482; 490 (index); LDürr, D. Wertung des göttl. Wortes im AT u. im ant. Orient ’38 (§9 of the Joh. Logos); EBréhier, Les idées philosophiques et religieuses de Philon d’Alexandrie 1907, 83–111; (² ’25); JLebreton, Les théories du Logos au début de l’ère chrétienne 1907; ESchwartz, NGG 1908, 537–56; GVos, The Range of the Logos-Title in the Prologue of the Fourth Gospel: PTR 11, 1913, 365–419; 557–602; RHarris, The Origin of the Prologue to St. John’s Gospel 1917, Athena, Sophia and the Logos: BJRL 7, 1, 1922 p. 56–72; M-JLagrange, Vers le Logos de S. Jean: RB 32, 1923, 161–84, Le Logos de Philon: ibid. 321–71; HLeisegang, Logos: Pauly-W. XIII 1926, 1035–81; TGlasson, Heraclitus’ Alleged Logos Doctr., JTS 3, ’52, 231–38.—NWeinstein, Z. Genesis d. Agada 1901, 29–90; Billerb. II 302–33.—Rtzst., Zwei religionsgeschichtl. Fragen 1901, 47–132, Mysterienrel.³ 1927, 428 index; WBousset, Kyrios Christos² 1921, 304ff; 316f; JKroll, D. Lehren d. Hermes Trismegistos1914, 418 index.—RBultmann, D. religionsgesch. Hintergrund des Prol. z. Joh.: HGunkel Festschr., 1923, II 1–26, Comm. ’41, 5ff; AAlexander, The Johannine Doctrine of the Logos: ET 36, 1925, 394–99; 467–72; (Rtzst. and) HSchaeder, Studien z. antiken Synkretismus 1926, 306–37; 350; GAvdBerghvanEysinga, In den beginne was de Logos: NThT 23, ’34, 105–23; JDillersberger, Das Wort von Logos ’35; RBury, The 4th Gosp. and the Logos-Doctrine ’40; EMay, CBQ 8, ’46, 438–47; GKnight, From Moses to Paul ’49, 120–29. TW IV 76–89; 126–40 (on this s. SLyonnet, Biblica 26, ’45, 126–31); CStange, ZST 21, ’50, 120–41; MBoismard, Le Prologue de St. Jean ’53; HLangkammer, BZ 9, ’65, 91–94; HRinggren, Word and Wisdom [hypostatization in Near East] ’47; WEltester, Haenchen Festschr., ’64, 109–34; HWeiss, Untersuchungen zur Kosmologie etc., TU 97, ’66, 216–82; MRissi, Die Logoslieder im Prolog des vierten Evangeliums, TZ 31, ’75, 321–36; HLausberg, NAWG, Ph. ’87, 1 pp. 1–7.—B. 1262. DELG s.v. λέγω B 1. M-M. EDNT. TW.