henry+de

henry

• henry

henry s.m. (fis.) henry*.

1 Henry, Joseph Henry.

2 Henry, Patrick Henry.

3 Henry, William Henry.

4 Henry.

n. Henry

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n (H) DIN 1301 < phys> (Einheit der Induktivität; Vs/A) ■ henry (H)

n. henry, unit of electrical induction

1) Law: Hen.

2) Polymers: H

1) Law: Hen.

2) Polymers: H

(1394-1460)

   Known to the Portuguese as "O Infante Dom Henrique," as an heir to his father's throne, Prince Henry the Navigator was born in Oporto. His Father was King João I (r. 1357-1433) and his mother was Philippa of Lancaster, daughter of John of Gaunt. As a young prince, Henry won his knighthood as a member of the Portuguese expedition that captured the Moroccan city of Ceuta in 1415, the beginning of Portugal's overseas expansion and the onset of the European age of exploration and discovery.

   The life and work of Prince Henry are steeped in centuries of myth and legend. Reliable historical research suggests that the prince played a key role in the early phases of the Portuguese discoveries due to his patronage of expeditions, sailors, and navigators and his use of the important funds of the knightly Order of Christ, of which he was in control. Prince Henry, nevertheless, was not solely responsible for more than one-third of the exploration ventures during his time, possessed strongly medieval ways, did not create the so-called "School of Sagres" for navigators, and certainly was ignorant of much Renaissance science. Although he did participate nobly in the Ceuta adventure, as far as the voyages down the coast of Africa and into the Atlantic until his death in 1460 are concerned, Prince Henry was an armchair navigator who did not visit Africa beyond Morocco.

    See also Commemorations, Portuguese historic.

SUBJECT AREA: Ports and shipping

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After graduating in 1935 from the Webb Institute of Naval Architecture, New York, Henry served in different government agencies until 1938 when he joined the fast expanding US Maritime Commission. He assisted in the design and construction of troop-carrying vessels, Cl cargo ships, and he supervised the construction of two wartime attack transports. At the end of hostilities, he set up as a consultant naval architect and by 1951 had incorporated the business as J.J.Henry \& Company Inc. The opportunities that consultancy gave him were grasped eagerly; he became involved in the conversion of war-built tonnage to peaceful purposes (such as T2 tankers to ore carriers), the development of the new technologies of the carriage of liquefied gases at cryogenic temperatures and low pressures and, possibly the greatest step forward of all, the development of containerization. Containerization and the closely related field of barge transportation were to provide considerable business during the 1960s and the 1970s. The company designed the wonderful 33-knot container ships for Sea-Land and the auspicious Sea-bee barge carriers for the Lykes Brothers of New Orleans. James Henry's professional achievements were recognized internationally when he was elected President of the (United States) Society of Naval Architects and Marine Engineers in 1969. By then he had served on many boards and committees and was especially honoured to be Chairman of the Board of Trustees of his graduating college, the Webb Institute of Naval Architecture of New York.

SUBJECT AREA: Electricity, Telecommunications

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Sent to stay with relatives at the age of 6 because of the illness of his father, when the latter died in 1811 Henry was apprenticed to a silversmith and then turned to the stage. Whilst he was ill himself, a book on science fired his interest and he began studying at Albany Academy, working as a tutor to finance his studies. Initially intending to pursue medicine, he then spent some time as a surveyor before becoming Professor of Mathematics and Natural Philosophy at Albany Academy in 1826. There he became interested in the improvement of electromagnets and discovered that the use of an increased number of turns of wire round the core greatly increased their power; by 1831 he was able to supply to Yale a magnet capable of lifting almost a ton weight. During this time he also discovered the principles of magnetic induction and self-inductance. In the same year he made, but did not patent, a cable telegraph system capable of working over a distance of 1 mile (1.6 km). It was at this time, too, that he found that adiabatic expansion of gases led to their sudden cooling, thus paving the way for the development of refrigerators. For this he was recommended for, but never received, the Copley Medal of the Royal Society. Five years later he became Professor of Natural Philosophy at New Jersey College (later Princeton University), where he deduced the laws governing the operation of transformers and observed that changes in magnetic flux induced electric currents in conductors. Later he also observed that spark discharges caused electrical effects at a distance. He therefore came close to the discovery of radio waves. In 1836 he was granted a year's leave of absence and travelled to Europe, where he was able to meet Michael Faraday. It was with his help that in 1844 Samuel Morse set up the first patented electric telegraph, but, sadly, the latter seems to have reaped all the credit and financial rewards. In 1846 he became the first secretary of the Washington Smithsonian Institute and did much to develop government support for scientific research. As a result of his efforts some 500 telegraph stations across the country were equipped with meteorological equipment to supply weather information by telegraph to a central location, a facility that eventually became the US National Weather Bureau. From 1852 he was a member of the Lighthouse Board, contributing to improvements in lighting and sound warning systems and becoming its chairman in 1871. During the Civil War he was a technical advisor to President Lincoln. He was a founder of the National Academy of Science and served as its President for eleven years.

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Henry Kissinger, Henry Alfred Kissinger.

Henry Luce, Henry Robinson Luce.

Henry Miller, Henry Valentine Miller.

Henry Moore, Henry Spencer Moore.

Henry Russell, Henry Norris Russell.