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do+number+work

  • 121 some

    1. pronoun, adjective
    1) (an indefinite amount or number (of): I can see some people walking across the field; You'll need some money if you're going shopping; Some of the ink was spilt on the desk.) μερικός,λίγος,μερικοί,κάποιοι
    2) ((said with emphasis) a certain, or small, amount or number (of): `Has she any experience of the work?' `Yes, she has some.'; Some people like the idea and some don't.) κάποιος
    3) ((said with emphasis) at least one / a few / a bit (of): Surely there are some people who agree with me?; I don't need much rest from work, but I must have some.) κάποιος,λίγος
    4) (certain: He's quite kind in some ways.) ορισμένος
    2. adjective
    1) (a large, considerable or impressive (amount or number of): I spent some time trying to convince her; I'll have some problem sorting out these papers!) αρκετός,κάμποσος
    2) (an unidentified or unnamed (thing, person etc): She was hunting for some book that she's lost.) κάποιος
    3) ((used with numbers) about; at a rough estimate: There were some thirty people at the reception.) περίπου,κάπου
    3. adverb
    ((American) somewhat; to a certain extent: I think we've progressed some.) κάπως
    - someday
    - somehow
    - someone
    - something
    - sometime
    - sometimes
    - somewhat
    - somewhere
    - mean something
    - or something
    - something like
    - something tells me

    English-Greek dictionary > some

  • 122 amount

    I [ə'maunt] n
    CHOICE OF WORDS:
    Русскому сочетанию количество чего-либо соответствуют английские сочетания an amount of smth и a number of smth Различие в их употреблении заключается в характере существительного, к которому они относятся: оборот an amount of сочетается с неисчисляемыми существительными и требует глагола в форме единственного числа, оборот a number of сочетается с исчисляемыми существительными и требует глагола в форме множественного числа: there is a great amount of work to be done yet еще предстоит сделать много работы, ср. there are a large number of reasons why it happened имеется много причин, почему это произошло
    II [ə'maunt] v
    быть равным, составлять, равняться

    His answer amounts to a refusal. — Его ответ равносилен отказу.

    His knowledge of the subject doesn't amount to much. — Его знание предмета весьма ограничено.

    It amounts to the same thing. — Это, в общем, одно и то же

    - amount to a lot of money
    - amount to $100

    English-Russian combinatory dictionary > amount

  • 123 some

    1. pronoun, adjective
    1) (an indefinite amount or number (of): I can see some people walking across the field; You'll need some money if you're going shopping; Some of the ink was spilt on the desk.) quelque(s); un peu
    2) ((said with emphasis) a certain, or small, amount or number (of): `Has she any experience of the work?' `Yes, she has some.'; Some people like the idea and some don't.) certain(s)
    3) ((said with emphasis) at least one / a few / a bit (of): Surely there are some people who agree with me?; I don't need much rest from work, but I must have some.) quelques; un peu
    4) (certain: He's quite kind in some ways.) certain
    2. adjective
    1) (a large, considerable or impressive (amount or number of): I spent some time trying to convince her; I'll have some problem sorting out these papers!) beaucoup de
    2) (an unidentified or unnamed (thing, person etc): She was hunting for some book that she's lost.) quelconque
    3) ((used with numbers) about; at a rough estimate: There were some thirty people at the reception.) environ
    3. adverb
    ((American) somewhat; to a certain extent: I think we've progressed some.) quelque
    - someday - somehow - someone - something - sometime - sometimes - somewhat - somewhere - mean something - or something - something like - something tells me

    English-French dictionary > some

  • 124 some

    1. pronoun, adjective
    1) (an indefinite amount or number (of): I can see some people walking across the field; You'll need some money if you're going shopping; Some of the ink was spilt on the desk.) algum
    2) ((said with emphasis) a certain, or small, amount or number (of): `Has she any experience of the work?' `Yes, she has some.'; Some people like the idea and some don't.) algum
    3) ((said with emphasis) at least one / a few / a bit (of): Surely there are some people who agree with me?; I don't need much rest from work, but I must have some.) algum, um pouco
    4) (certain: He's quite kind in some ways.) certo
    2. adjective
    1) (a large, considerable or impressive (amount or number of): I spent some time trying to convince her; I'll have some problem sorting out these papers!)
    2) (an unidentified or unnamed (thing, person etc): She was hunting for some book that she's lost.) algum
    3) ((used with numbers) about; at a rough estimate: There were some thirty people at the reception.) cerca de
    3. adverb
    ((American) somewhat; to a certain extent: I think we've progressed some.) um pouco
    - someday - somehow - someone - something - sometime - sometimes - somewhat - somewhere - mean something - or something - something like - something tells me

    English-Portuguese (Brazil) dictionary > some

  • 125 take

    take ⇒ Sizes
    A n
    1 Cin prise f (de vues) ; ‘it's a take!’ ‘elle est bonne!’ ;
    2 Fishg, Hunt ( of fish) prise f ; ( of game) tableau m de chasse ;
    3 ○ Comm ( amount received) recette f.
    B vtr ( prét took ; pp taken)
    1 ( take hold of) prendre [object, money] ; to take sb by the arm/hand/throat prendre qn par le bras/par la main/à la gorge ; to take sb's arm/hand prendre le bras/la main de qn ; to take sth from prendre qch sur [shelf, table] ; prendre qch dans [drawer, box] ; to take sth out of sth sortir qch de qch ; the passage is taken from his latest book le passage est tiré de son dernier livre ;
    2 ( use violently) to take a knife/an axe to sb attaquer qn avec un couteau/une hache ;
    3 ( have by choice) prendre [bath, shower, holiday] ; to take lessons prendre des leçons (in de) ; we take a newspaper/three pints of milk every day nous prenons le journal/trois pintes de lait tous les jours ; we take the Gazette nous recevons la Gazette ; I'll take a pound of apples, please donnez-moi une livre de pommes, s'il vous plaît ; take a seat! asseyez-vous! ; to take a wife/a husband† prendre femme/un mari† ;
    4 ( carry along) emporter, prendre [object] ; emmener [person] ; to take sb to school/to work/to the hospital emmener qn à l'école/au travail/à l'hôpital ; to take a letter/a cheque to the post office porter une lettre/un chèque à la poste ; to take chairs into the garden porter des chaises dans le jardin ; to take the car to the garage emmener la voiture au garage ; the book? he's taken it with him le livre? il l'a emporté ; to take sb sth, to take sth to sb apporter qch à qn ; to take sb dancing/swimming emmener qn danser/se baigner ; to take sth upstairs/downstairs monter/descendre qch ; you can't take him anywhere! hum il n'est pas sortable! ;
    5 (lead, guide) I'll take you through the procedure je vous montrerai comment on procède ; to take the actors through the scene faire travailler la scène aux acteurs ; I'll take you up to the second floor/to your room je vais vous conduire au deuxième étage/à votre chambre ;
    6 ( transport) to take sb to [bus] conduire or emmener qn à [place] ; [road, path] conduire or mener qn à [place] ; his work takes him to many different countries son travail l'appelle à se déplacer dans beaucoup de pays différents ; what took you to Brussels? qu'est-ce que vous êtes allé faire à Bruxelles? ;
    7 ( use to get somewhere) prendre [bus, taxi, plane etc] ; prendre [road, path] ; take the first turn on the right/left prenez la première à droite/à gauche ;
    8 ( negotiate) [driver, car] prendre [corner, bend] ; [horse] sauter [fence] ;
    9 ( accept) accepter, recevoir [bribe, money] ; prendre [patients, pupils] ; accepter [job] ; prendre [phone call] ; [machine] accepter [coin] ; [shop, restaurant etc] accepter [credit card, cheque] ; [union, employee] accepter [reduction, cut] ; will you take £10 for the radio? je vous offre 10 livres sterling en échange de votre radio ; that's my last offer, take it or leave it ! c'est ma dernière proposition, c'est à prendre ou à laisser! ; whisky? I can take it or leave it! le whisky? je peux très bien m'en passer ;
    10 ( require) [activity, course of action] demander, exiger [patience, skill, courage] ; it takes patience/courage to do il faut de la patience/du courage pour faire ; it takes three hours/years etc to do il faut trois heures/ans etc pour faire ; it won't take long ça ne prendra pas longtemps ; it took her 10 minutes to repair it elle a mis 10 minutes pour le réparer ; the wall won't take long to build le mur sera vite construit ; it won't take long to do the washing-up la vaisselle sera vite faite ; it would take a genius/a strong person to do that il faudrait un génie/quelqu'un de robuste pour faire ça ; to have what it takes avoir tout ce qu'il faut (to do pour faire) ; typing all those letters in two hours will take some doing! ce ne sera pas facile de taper toutes ces lettres en deux heures! ; she'll take some persuading ce sera dur de la convaincre ;
    11 Ling [verb] prendre [object] ; [preposition] être suivi de [case] ;
    12 ( endure) supporter [pain, criticism] ; accepter [punishment, opinions] ; I find their attitude hard to take je trouve leur attitude difficile à accepter ; he can't take being criticized il ne supporte pas qu'on le critique ; she just sat there and took it! elle est restée là et ne s'est pas défendue ; he can't take a joke il ne sait pas prendre une plaisanterie ; go on, tell me, I can take it! vas-y, dis-le, je n'en mourrai pas ○ ! ; I can't take any more! je suis vraiment à bout! ;
    13 ( react to) prendre [news, matter, criticism, comments] ; to take sth well/badly bien/mal prendre qch ; to take sth seriously/lightly prendre qch au sérieux/à la légère ; to take things one ou a step at a time prendre les choses une par une ;
    14 ( assume) I take it that je suppose que ; to take sb for ou to be sth prendre qn pour qch ; what do you take me for? pour qui est-ce que tu me prends? ; what do you take this poem to mean? comment est-ce que vous interprétez ce poème? ;
    15 ( consider as example) prendre [person, example, case] ; take John (for example), he has brought up a family by himself prends John, il a élevé une famille tout seul ; let us ou if we take the situation in France prenons la situation en France ; take Stella, she never complains! regarde Stella, elle ne se plaint jamais! ;
    16 ( adopt) adopter [view, attitude, measures, steps] ; to take a soft/tough line on sb/sth adopter une attitude indulgente/sévère à l'égard de qn/qch ; to take the view ou attitude that être d'avis que, considérer que ;
    17 ( record) prendre [notes, statement] ; [doctor, nurse] prendre [pulse, temperature, blood pressure] ; [secretary] prendre [letter] ; to take sb's measurements ( for clothes) prendre les mesures de qn ; to take a reading lire les indications ;
    18 ( hold) [hall, bus] avoir une capacité de, pouvoir contenir [50 people, passengers etc] ; [tank, container] pouvoir contenir [quantity] ; the tank/bus will take… le réservoir/bus peut contenir… ; the cupboard/the suitcase won't take any more clothes il est impossible de mettre plus de vêtements dans ce placard/ cette valise ;
    19 ( consume) prendre [sugar, milk, pills, remedy] ; to take tea/lunch with sb GB sout prendre le thé/déjeuner avec qn ; ⇒ drug ;
    20 ( wear) ( in clothes) faire [size] ; to take a size 4 ( in shoes) ≈ faire ○ or chausser du 37 ;
    21 Phot prendre [photograph] ;
    22 Math ( subtract) soustraire [number, quantity] (from de) ;
    23 ( study) prendre, faire [subject] ; suivre [course] ;
    24 Sch, Univ ( sit) passer [exam, test] ;
    25 ( teach) [teacher, lecturer] faire cours à [students, pupils] ; to take sb for Geography/French faire cours de géographie/de français à qn ;
    26 ( officiate at) [priest] célébrer [service, prayer, wedding] ; dire [mass] ;
    27 ( capture) [army, enemy] prendre [fortress, city] ; ( in chess) [player] prendre [piece] ; ( in cards) faire [trick] ; [person] remporter [prize] ; ⇒ hostage, prisoner ;
    28 ○ ( have sex with) prendre [woman].
    C vi ( prét took ; pp taken)
    1 ( have desired effect) [drug] faire effet ; [dye] prendre ; ( grow successfully) [plant] prendre ;
    2 Fishg [fish] mordre.
    I'll take it from here fig je prendrai la suite ; to be on the take ○ toucher des pots-de-vin ; to take it ou a lot out of sb fatiguer beaucoup qn ; to take it upon oneself to do prendre sur soi de faire ; to take sb out of himself changer les idées à qn ; you can take it from me,… croyez-moi,…
    ▶ take [sb] aback interloquer [person].
    ▶ take after [sb] tenir de [father, mother etc].
    ▶ take against [sb] prendre [qn] en grippe.
    ▶ take [sb/sth] along, take along [sb/sth] emporter [object] ; emmener [person].
    ▶ take apart se démonter ; does it take apart? est-ce que ça se démonte? ;
    ▶ take [sb/sth] apart
    1 ( separate into parts) démonter [car, machine] ;
    2 ○ fig ( defeat) [player, team] massacrer ○ [opponent, team] ;
    3 ○ ( criticize) [person, critic, teacher] descendre [qch] en flammes ○ [essay, film, book].
    ▶ take [sb] aside prendre [qn] à part.
    ■ take away:
    ▶ take [sb/sth] away, take away [sb/sth]
    1 ( remove) enlever, emporter [object] (from de) ; emmener [person] (from de) ; supprimer [pain, fear, grief] (from de) ; ‘two hamburgers to take away, please’ GB ‘deux hamburgers à emporter, s'il vous plaît’ ; to take away sb's appetite faire perdre l'appétit à qn ;
    2 fig ( diminish) that doesn't take anything away from his achievement ça n'enlève rien à ce qu'il a accompli ;
    3 ( subtract) soustraire [number] (from à, de) ; ten take away seven is three dix moins sept égalent trois.
    ■ take back:
    ▶ take [sth] back, take back [sth]
    1 ( return to shop) [person, customer] rapporter [goods] (to à) ;
    2 ( retract) retirer [statement, words] ; I take it back je retire ce que j'ai dit ;
    ▶ take [sb] back ( cause to remember) rappeler des souvenirs à [person] ; this song takes me back to my childhood cette chanson me rappelle mon enfance ;
    ▶ take [sb/sth] back, take back [sb/sth] ( accept again) reprendre [partner, employee] ; reprendre [gift, ring] ; [shop] reprendre [goods].
    ■ take down:
    ▶ take [sth] down, take down [sth]
    1 ( remove) descendre [book, vase, box] ; enlever [picture, curtains] ;
    2 ( lower) baisser [skirt, pants] ;
    3 ( dismantle) démonter [tent, scaffolding] ;
    4 ( write down) noter [name, statement, details].
    ■ take hold:
    ▶ take hold [disease, epidemic] s'installer ; [idea, ideology] se répandre ; [influence] s'accroître ; to take hold of ( grasp) prendre [object, hand] ; fig ( overwhelm) [feeling, anger] envahir [person] ; [idea] prendre [person].
    ■ take in:
    ▶ take [sb] in, take in [sb]
    1 ( deceive) tromper, abuser [person] ; he was taken in il s'est laissé abuser ; don't be taken in by appearances! ne te fie pas aux apparences! ; I wasn't taken in by him je ne me suis pas laissé prendre à son jeu ;
    2 ( allow to stay) recueillir [person, refugee] ; prendre [lodger] ;
    ▶ take in [sth]
    1 ( understand) saisir, comprendre [situation] ; I can't take it in! je n'arrive pas à le croire! ;
    2 ( observe) noter [detail] ; embrasser [scene] ;
    3 ( encompass) inclure [place, developments] ;
    4 ( absorb) [root] absorber [nutrients] ; [person, animal] absorber [oxygen] ; fig s'imprégner de [atmosphere] ;
    5 Naut [boat] prendre [water] ;
    6 Sewing reprendre [dress, skirt etc] ;
    7 ( accept for payment) faire [qch] à domicile [washing, mending] ;
    8 ○ ( visit) aller à [play, exhibition].
    ■ take off:
    1 ( leave the ground) [plane] décoller ;
    2 fig [idea, fashion] prendre ; [product] marcher ; [sales] décoller ;
    3 ○ ( leave hurriedly) filer ○ ;
    ▶ take [sth] off
    1 ( deduct) to take £10 off (the price) réduire le prix de 10 livres, faire une remise de 10 livres ;
    2 ( have as holiday) to take two days off prendre deux jours de congé ; I'm taking next week off je suis en congé la semaine prochaine ;
    3 ( make look younger) that hairstyle takes 15 years off you! cette coiffure te rajeunit de 15 ans! ;
    ▶ take [sth] off, take off [sth]
    1 ( remove) enlever, ôter [clothing, shoes] ; enlever [lid, feet, hands] (from de) ; supprimer [dish, train] ; to take sth off the market retirer qch du marché ;
    2 ( amputate) amputer, couper [limb] ;
    3 ( withdraw) annuler [show, play] ;
    ▶ take [sb] off, take off [sb]
    1 ○ ( imitate) imiter [person] ;
    2 ( remove) to take sb off the case [police] retirer l'affaire à qn ; to take oneself off partir, s'en aller (to à).
    ■ take on:
    ▶ take on ( get upset) don't take on so ( stay calm) ne t'énerve pas ; ( don't worry) ne t'en fais pas ;
    ▶ take [sb/sth] on, take on [sb/sth]
    1 ( employ) embaucher, prendre [staff, worker] ;
    2 ( compete against) [team, player] jouer contre [team, player] ; ( fight) se battre contre [person, opponent] ; to take sb on at chess/at tennis jouer aux échecs/au tennis contre qn ;
    3 ( accept) accepter, prendre [work, task] ; prendre [responsibilities] ;
    4 ( acquire) prendre [look, significance, colour, meaning].
    ■ take out:
    ▶ take out s'enlever ; does this take out? est-ce que ça s'enlève? ;
    ▶ take [sb/sth] out, take out [sb/sth]
    1 ( remove) sortir [object] (from, of de) ; [dentist] extraire, arracher ○ [tooth] ; [doctor] enlever [appendix] ; ( from bank) retirer [money] (of de) ; take your hands out of your pockets! enlève tes mains de tes poches! ;
    2 ( go out with) sortir avec [person] ; to take sb out to dinner/for a walk emmener qn dîner/se promener ;
    3 ( eat elsewhere) emporter [fast food] ; ‘two hamburgers to take out, please!’ ‘deux hamburgers à emporter, s'il vous plaît! ;
    4 ( deduct) déduire [contributions, tax] (of de) ;
    5 ○ (kill, destroy) éliminer [person] ; détruire [installation, target] ;
    6 to take sth out on sb passer qch sur qn [anger, frustration] ; to take it out on sb s'en prendre à qn.
    ■ take over:
    1 ( take control) (of town, country, party) [army, faction] prendre le pouvoir ; he's always trying to take over il veut toujours tout commander ;
    2 ( be successor) [person] prendre la suite (as comme) ; to take over from remplacer, succéder à [predecessor] ;
    ▶ take over [sth]
    1 ( take control of) prendre le contrôle de [town, country] ; reprendre [business] ; shall I take over the driving for a while? veux-tu que je prenne un peu le volant? ;
    2 Fin racheter, prendre le contrôle de [company].
    ■ take part prendre part ; to take part in participer à [production, activity].
    ■ take place avoir lieu.
    ■ take to:
    ▶ take to [sb/sth]
    1 ( develop liking for) he has really taken to her/to his new job elle/son nouvel emploi lui plaît vraiment beaucoup ;
    2 ( begin) to take to doing ○ se mettre à faire ; he's taken to smoking/wearing a hat il s'est mis à fumer/porter un chapeau ;
    3 (go) se réfugier dans [forest, hills] ; to take to one's bed se mettre au lit ; to take to the streets descendre dans la rue.
    ■ take up:
    ▶ take up ( continue story etc) reprendre ; to take up where sb/sth left off reprendre là où qn/qch s'était arrêté ; to take up with s'attacher à [person, group] ;
    ▶ take up [sth]
    1 ( lift up) enlever [carpet, pavement, track] ; prendre [pen] ;
    2 ( start) se mettre à [golf, guitar] ; prendre [job] ; to take up a career as an actor se lancer dans le métier d'acteur ; to take up one's duties ou responsibilities entrer dans ses fonctions ;
    3 ( continue) reprendre [story, discussion] ; reprendre [cry, refrain] ;
    4 ( accept) accepter [offer, invitation] relever [challenge] ; to take up sb's case Jur accepter de défendre qn ;
    5 to take sth up with sb soulever [qch] avec qn [matter] ;
    6 ( occupy) prendre, occuper [space] ; prendre, demander [time, energy] ;
    7 ( adopt) prendre [position, stance] ;
    8 Sewing ( shorten) raccourcir [skirt, curtains etc] ;
    9 ( absorb) [sponge, material, paper] absorber [liquid] ;
    ▶ take [sb] up
    1 ( adopt) fig she was taken up by the surrealists elle a été adoptée par les surréalistes ;
    2 to take sb up on ( challenge) reprendre qn sur [point, assertion] ; ( accept) to take sb up on an invitation/an offer accepter l'invitation/l'offre de qn.

    Big English-French dictionary > take

  • 126 Keller, Arthur

    [br]
    b. 18 August 1901 New York City, New York, USA d. 1983
    [br]
    American engineer and developer of telephone switching equipment who was instrumental in the development of electromechanical recording and stereo techniques.
    [br]
    He obtained a BSc in electrical engineering at Cooper Union for the Advancement of Science and Art, New York, in 1923 and an MSc from Yale University, and he did postgraduate work at Columbia University. Most of the time he was also on the staff of the Bell Telephone Laboratories. The Bell Laboratories and its predecessors had a long tradition in research in speech and hearing, and in a team of researchers under H.C. Harrison, Keller developed a number of definite improvements in electrical pick-ups, gold-sputtering for matrix work and electrical disc recording equipment. From 1931 onwards the team at Bell Labs developed disc recording for moving pictures and entered into collaboration with Leopold Stokowski and the Philadelphia Orchestra concerning transmission and recording of high-fidelity sound over wires, and stereo techniques. Keller developed a stereo recording system for disc records independently of A.D. Blumlein that was used experimentally in the Bell Labs during the 1930s. During the Second World War Keller was in a team developing sonar (sound navigation and ranging) for the US Navy. After the war he concentrated on switching equipment for telephone exchanges and developed a miniature relay. In 1966 he retired from the Bell Laboratories, where he had been Director of several departments, ending as Director of the Switching Apparatus Laboratory. After retirement he was a consultant internationally, concerning electromechanical devices in particular. When, in 1980, the Bell Laboratories decided to issue LP re-recordings of a number of the experimental records made during the 1930s, Keller was brought in from retirement to supervise the project and decide on the selections.
    [br]
    Bibliography
    Keller was inventor or co-inventor of forty patents, including: US patent no. 2,114,471 (the principles of stereo disc recording); US patent no. 2,612,586 (tape guides with air lubrication); US patent no. 3,366,901 (a miniature crossbar switch).
    Apart from a large number of highly technical papers, Keller also wrote the article "Phonograph" in the 1950 and 1957 editions of Encyclopaedia Britannica.
    1986, Reflections of a Stereo Pioneer, San Francisco: San Francisco Press (an honest, personal account).
    GB-N

    Biographical history of technology > Keller, Arthur

  • 127 Marrison, Warren Alvin

    [br]
    b. 21 May 1896 Inverary, Canada
    d. 27 March 1980 Palo Verdes Estates, California, USA
    [br]
    Canadian (naturalized American) electrical engineer, pioneer of the quartz clock.
    [br]
    Marrison received his high-school education at Kingston Collegiate Institute, Ontario, and in 1914 he entered Queen's University in Kingston. He graduated in Engineering Physics in 1920, his college career having been interrupted by war service in the Royal Flying Corps. During his service in the Flying Corps he worked on radio, and when he returned to Kingston he established his own transmitter. This interest in radio was later to influence his professional life.
    In 1921 he entered Harvard University, where he obtained an MA, and shortly afterwards he joined the Western Electric Company in New York to work on the recording of sound on film. In 1925 he transferred to Western Electric's Bell Laboratory, where he began what was to become his life's work: the development of frequency standards for radio transmission. In 1922 Cady had used the elastic vibration of a quartz crystal to control the frequency of a valve oscillator, but at that time there was no way of counting and displaying the number of vibrations as the frequency was too high. In 1927 Marrison succeeded in dividing the frequency electronically until it was low enough to drive a synchronous motor. Although his purpose was to determine the frequency accurately by counting the number of vibrations that occurred in a given time, he had incidentally produced the first quartz-crystal -ontrolled clock. The results were sufficiently encouraging for him to build an improved version the following year, specifically as a time and frequency standard.
    [br]
    Principal Honours and Distinctions
    British Horological Institute Gold Medal 1947. Clockmakers' Company Tompion Medal 1955.
    Bibliography
    1928, with J.W.Horton, "Precision measurement of frequency", Proceedings of the Institute of Radio Engineers 16:137–54 (provides details of the original quartz clock, although it was not described as such).
    1930, "The crystal clock", Proceedings of the National Academy of Sciences 16:496–507 (describes the second clock).
    Further Reading
    W.R.Topham, 1989, "Warren A.Marrison—pioneer of the quartz revolution", NAWCC Bulletin 31(2):126–34.
    J.D.Weaver, 1982, Electrical and Electronic Clocks and Watches, London (a technical assessment of his work on the quartz clock).
    DV

    Biographical history of technology > Marrison, Warren Alvin

  • 128 Smeaton, John

    [br]
    b. 8 June 1724 Austhorpe, near Leeds, Yorkshire, England
    d. 28 October 1792 Austhorpe, near Leeds, Yorkshire, England
    [br]
    English mechanical and civil engineer.
    [br]
    As a boy, Smeaton showed mechanical ability, making for himself a number of tools and models. This practical skill was backed by a sound education, probably at Leeds Grammar School. At the age of 16 he entered his father's office; he seemed set to follow his father's profession in the law. In 1742 he went to London to continue his legal studies, but he preferred instead, with his father's reluctant permission, to set up as a scientific instrument maker and dealer and opened a shop of his own in 1748. About this time he began attending meetings of the Royal Society and presented several papers on instruments and mechanical subjects, being elected a Fellow in 1753. His interests were turning towards engineering but were informed by scientific principles grounded in careful and accurate observation.
    In 1755 the second Eddystone lighthouse, on a reef some 14 miles (23 km) off the English coast at Plymouth, was destroyed by fire. The President of the Royal Society was consulted as to a suitable engineer to undertake the task of constructing a new one, and he unhesitatingly suggested Smeaton. Work began in 1756 and was completed in three years to produce the first great wave-swept stone lighthouse. It was constructed of Portland stone blocks, shaped and pegged both together and to the base rock, and bonded by hydraulic cement, scientifically developed by Smeaton. It withstood the storms of the English Channel for over a century, but by 1876 erosion of the rock had weakened the structure and a replacement had to be built. The upper portion of Smeaton's lighthouse was re-erected on a suitable base on Plymouth Hoe, leaving the original base portion on the reef as a memorial to the engineer.
    The Eddystone lighthouse made Smeaton's reputation and from then on he was constantly in demand as a consultant in all kinds of engineering projects. He carried out a number himself, notably the 38 mile (61 km) long Forth and Clyde canal with thirty-nine locks, begun in 1768 but for financial reasons not completed until 1790. In 1774 he took charge of the Ramsgate Harbour works.
    On the mechanical side, Smeaton undertook a systematic study of water-and windmills, to determine the design and construction to achieve the greatest power output. This work issued forth as the paper "An experimental enquiry concerning the natural powers of water and wind to turn mills" and exerted a considerable influence on mill design during the early part of the Industrial Revolution. Between 1753 and 1790 Smeaton constructed no fewer than forty-four mills.
    Meanwhile, in 1756 he had returned to Austhorpe, which continued to be his home base for the rest of his life. In 1767, as a result of the disappointing performance of an engine he had been involved with at New River Head, Islington, London, Smeaton began his important study of the steam-engine. Smeaton was the first to apply scientific principles to the steam-engine and achieved the most notable improvements in its efficiency since its invention by Newcomen, until its radical overhaul by James Watt. To compare the performance of engines quantitatively, he introduced the concept of "duty", i.e. the weight of water that could be raised 1 ft (30 cm) while burning one bushel (84 lb or 38 kg) of coal. The first engine to embody his improvements was erected at Long Benton colliery in Northumberland in 1772, with a duty of 9.45 million pounds, compared to the best figure obtained previously of 7.44 million pounds. One source of heat loss he attributed to inaccurate boring of the cylinder, which he was able to improve through his close association with Carron Ironworks near Falkirk, Scotland.
    [br]
    Principal Honours and Distinctions
    FRS 1753.
    Bibliography
    1759, "An experimental enquiry concerning the natural powers of water and wind to turn mills", Philosophical Transactions of the Royal Society.
    Towards the end of his life, Smeaton intended to write accounts of his many works but only completed A Narrative of the Eddystone Lighthouse, 1791, London.
    Further Reading
    S.Smiles, 1874, Lives of the Engineers: Smeaton and Rennie, London. A.W.Skempton, (ed.), 1981, John Smeaton FRS, London: Thomas Telford. L.T.C.Rolt and J.S.Allen, 1977, The Steam Engine of Thomas Newcomen, 2nd edn, Hartington: Moorland Publishing, esp. pp. 108–18 (gives a good description of his work on the steam-engine).
    LRD

    Biographical history of technology > Smeaton, John

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