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41 cut
cut [kʌt]couper ⇒ 1 (a)-(f), 1 (h), 1 (j), 1 (o), 1 (q), 1 (t), 2 (a), 2 (d)-(g) découper ⇒ 1 (b) tondre ⇒ 1 (c) interrompre ⇒ 1 (f) arrêter ⇒ 1 (g) réduire ⇒ 1 (i), 1 (j) blesser ⇒ 1 (k) manquer ⇒ 1 (m) percer ⇒ 1 (n) graver ⇒ 1 (p) monter ⇒ 1 (r) se couper ⇒ 2 (b) faire mal ⇒ 2 (c) coupure ⇒ 3 (a), 3 (b), 3 (f) coup ⇒ 3 (c), 3 (g) morceau ⇒ 3 (d) réduction ⇒ 3 (e) coupe ⇒ 3 (h), 3 (k) part ⇒ 3 (i) coupé ⇒ 4 (a), 4 (c) réduit ⇒ 4 (b)(a) (incise, slash, sever) couper;∎ cut the box open with the knife ouvrez la boîte avec le couteau;∎ he fell and cut his knee (open) il s'est ouvert le genou en tombant;∎ she cut her hand elle s'est coupé la main ou à la main;∎ he cut his wrists il s'est ouvert ou taillé les veines;∎ to cut one's throat se trancher la gorge;∎ they cut his throat ils lui ont coupé ou tranché la gorge, ils l'ont égorgé;∎ they cut the prisoners free or loose ils ont détaché les prisonniers;∎ figurative to cut oneself loose from sth se libérer de qch;∎ they cut our supply line ils nous ont coupé notre approvisionnement;∎ figurative the fog's so thick you could cut it with a knife il y a un brouillard à couper au couteau;∎ the atmosphere was so tense, you could cut it with a knife l'atmosphère était extrêmement tendue;∎ you're cutting your own throat c'est du suicide∎ she cut articles from the paper elle découpait des articles dans le journal;∎ cut the cake in half/in three pieces coupez le gâteau en deux/en trois;∎ to cut sth to shreds or to ribbons mettre qch en pièces;∎ figurative the enemy cut the army to pieces l'ennemi a taillé l'armée en pièces;∎ figurative the critics cut the play to pieces les critiques ont esquinté la pièce∎ I'll have to cut the grass this weekend il faudra que je tonde la pelouse ce week-end;∎ I cut my nails/my hair je me suis coupé les ongles/les cheveux;∎ you've had your hair cut vous vous êtes fait couper les cheveux(d) (shape → dress, suit) couper; (→ diamond, glass, key) tailler; (→ screw) fileter; (dig → channel, tunnel) creuser, percer; (engrave) graver; (sculpt) sculpter;∎ steps had been cut in the rock on avait taillé des marches dans le rocher;∎ we cut our way through the crowd nous nous sommes frayé ou ouvert un chemin à travers la foule;∎ the advance cut a swath through the enemy's defences l'avance des troupes ouvrit une brèche dans la défense ennemie;∎ proverb cut your coat according to your cloth = il ne faut pas vivre au-dessus de ses moyens∎ where the path cuts the road à l'endroit où le chemin coupe la route(f) (interrupt) interrompre, couper;∎ to cut sb short couper la parole à qn;∎ we had to cut our visit short nous avons dû écourter notre visite;∎ his career was tragically cut short by illness sa carrière a été tragiquement interrompue par la maladie;∎ to cut a long story short, I left bref ou en deux mots, je suis parti∎ he cut working weekends il a arrêté de travailler le weekend;∎ cut the very familiar crap or vulgar shit! arrête tes conneries!(h) (switch off) couper;∎ cut the lights! coupez la lumière!, éteignez!;∎ he cut the engine il a coupé ou arrêté le moteur∎ we cut our costs by half nous avons réduit nos frais de moitié;∎ they cut taxes in the run-up to the election ils ont réduit les impôts juste avant les élections;∎ to cut prices casser les prix;∎ the athlete cut five seconds off the world record or cut the world record by five seconds l'athlète a amélioré le record mondial de cinq secondes∎ the censors cut all scenes of violence la censure a coupé ou supprimé toutes les scènes de violence;∎ the film was cut to 100 minutes le film a été ramené à 100 minutes(k) (hurt feelings of) blesser profondément;∎ her remark cut me deeply sa remarque m'a profondément blessé∎ they cut me (dead) in the street dans la rue ils ont fait comme s'ils ne me voyaient pas□ ;∎ he cut me dead for days after our argument il m'a battu froid pendant des jours après notre dispute□∎ I had to cut lunch in order to get there on time j'ai dû me passer de déjeuner pour arriver à l'heure;∎ the students cut class les étudiants ont séché le cours;∎ to cut school sécher les cours∎ the baby is cutting his first tooth le bébé perce sa première dent;∎ familiar figurative a pianist who cut her teeth on Bach une pianiste qui s'est fait la main sur du Bach(p) (record, track) graver, faire∎ to cut the cards couper∎ to cut the ground from under sb's feet couper l'herbe sous le pied de qn;∎ her promotion cut the ground from under his feet sa promotion lui a coupé l'herbe sous le pied;∎ familiar he couldn't cut it, he couldn't cut the mustard il n'était pas à la hauteur□ ;∎ to cut sth fine compter un peu juste, ne pas se laisser de marge;∎ you're cutting it a bit fine vous comptez un peu juste;∎ an hour is cutting it too fine une heure, ce n'est pas suffisant;∎ familiar that argument cuts no ice with me cet argument ne m'impressionne pas□ ;∎ to cut a fine figure avoir fière allure;∎ to cut one's losses sauver les meubles;∎ we decided to cut our losses nous avons décidé de sauver les meubles;∎ Cars to cut a corner prendre un virage à la corde, couper un virage; figurative sauter des étapes;∎ figurative to cut corners (economize excessively) faire des économies exagérées; (not follow rules) contourner les règlements;∎ if you cut corners now you'll just have more work to do later on si tu fais les choses trop vite maintenant, tu auras plus à faire plus tard;∎ figurative she doesn't believe in cutting corners elle fait toujours les choses à fond;∎ figurative they cut corners to finish on time ils ont brûlé les étapes pour finir à temps;∎ old-fashioned to cut a rug danser(a) (incise, slash) couper, trancher;∎ this knife doesn't cut ce couteau ne coupe pas bien;∎ cut around the edge découpez ou coupez en suivant le bord;∎ she cut into the bread elle a entamé le pain;∎ the rope cut into my wrists la corde m'a coupé ou cisaillé les poignets;∎ the string is cutting into me le cordon me coupe la chair;∎ figurative he cut through all the red tape il s'est dispensé de toutes les formalités administratives;∎ figurative the whip cut through the air le fouet fendit l'air;∎ figurative the yacht cut through the waves le yacht fendait les vagues;∎ Nautical the boat cut loose le bateau a rompu les amarres;∎ figurative to cut loose se libérer;∎ to cut and run se sauver, filer;∎ that argument cuts both or two ways c'est un argument à double tranchant(b) (cloth, paper) se couper;∎ this meat cuts easily cette viande se coupe facilement;∎ the cake will cut into six pieces ce gâteau peut se couper en six(c) (hurtfully) faire mal(d) (take shorter route) couper, passer;∎ cut through the back way and you'll get there first coupez par derrière et vous arriverez (là-bas) les premiers;∎ we cut across the fields nous avons coupé par les champs∎ this path cuts across or through the swamp ce sentier traverse ou coupe à travers le marécage(f) (in cards) couper;∎ they cut for the deal ils ont coupé avant de donner∎ the film cuts straight from the love scene to the funeral l'image passe directement de la scène d'amour à l'enterrement;∎ cut! coupez!3 noun∎ a cut on the arm une coupure ou une entaille au bras;∎ she had a nasty cut on her leg from the fall elle s'était fait une vilaine entaille à la jambe en tombant;∎ to be a cut above (the rest) être nettement mieux que les autres ou le reste;∎ that film is a cut above the others ce film est nettement mieux que les autres(b) (act of cutting) coupure f, entaille f;∎ to make a cut in sth (with knife, scissors etc) faire une entaille dans qch(c) (blow, stroke) coup m;∎ a knife/sword cut un coup de couteau/d'épée;∎ a saw cut un trait de scie;∎ figurative his treachery was the unkindest cut of all sa trahison était le coup le plus perfide∎ a cut off the joint un morceau de rôti;∎ prime cut morceau m de (premier) choix;∎ cheap cuts bas morceaux mpl∎ a cut in government spending une réduction ou diminution des dépenses publiques;∎ the cuts in the Health Service la réduction ou diminution du budget de la santé;∎ she took a cut in pay elle a subi une diminution ou réduction de salaire;∎ Finance the cuts les compressions fpl budgétaires;∎ power or electricity cut coupure f de courant(f) (deletion) coupure f;∎ they made several cuts in the film ils ont fait plusieurs coupures dans le film(g) (gibe, nasty remark) trait m, coup m∎ the cut of a suit la coupe d'un costume∎ what's his cut (of the profits)? à combien s'élève sa part?∎ the cut from the love scene to the funeral le changement de séquence de la scène d'amour à l'enterrement∎ I prefer a finer/coarser cut of tobacco je préfère le tabac plus fin/grossier∎ the cut and thrust of parliamentary debate les joutes oratoires des débats parlementaires;∎ the cut and thrust of the business world la concurrence féroce qui règne dans le monde des affaires;∎ it's cut and thrust la lutte est acharnée∎ to sell sth at cut prices vendre qch au rabais;∎ the cut version of the film la version raccourcie du film∎ a well-cut suit un costume bien coupé ou de bonne coupe►► cut glass cristal m taillé;Computing cut sheet feed dispositif m d'alimentation feuille à feuille; (act) alimentation f feuille à feuille;Computing cut sheet feeder dispositif m d'alimentation feuille à feuille(a) (cross, traverse) traverser, couper à travers;∎ it's quicker if you cut across the fields c'est plus rapide si tu coupes à travers (les) champs;∎ they cut across country ils ont coupé à travers champs(b) (go beyond) surpasser, transcender;∎ the issue cuts across party lines la question transcende le clivage des partis(c) (contradict) contredire, aller à l'encontre de;∎ it cuts across all my principles ça va à l'encontre de tous mes principes∎ they had to cut away the wreckage to reach the victim ils ont dû découper l'épave pour atteindre la victime➲ cut back∎ we cut back to the car nous sommes revenus à la voiture(c) (financially) économiser, réduire les dépenses∎ arms spending has been cut right back les dépenses d'armement ont été nettement réduites(financially) économiser sur; (time) réduire;∎ the factory cut back on production la fabrique a réduit la production∎ figurative he was cut down by malaria (killed) il est mort de la malaria; (incapacitated) il était terrassé par la malaria;∎ literary to be cut down in one's prime être fauché à la fleur de l'âge∎ to cut sth down to about 150,000 words réduire qch à environ 150 000 mots;∎ she cuts down her dresses for her daughter elle ajuste ses robes pour sa fille;∎ to cut sb down to size remettre qn à sa place∎ we've been asked to cut down the amount of time we devote to sports on nous a demandé de consacrer moins de temps au sport;∎ he cut his smoking down to ten a day il ne fume plus que dix cigarettes par jour(expenditure) réduire;∎ I'm going to cut down on drinking/smoking je vais boire/fumer moins;∎ they have cut down on eating out in restaurants ils vont moins souvent au restaurant;∎ to cut down on the amount of time spent doing sth passer moins de temps à faire qch➲ cut in(a) (interrupt) interrompre;∎ she cut in on their conversation elle est intervenue dans leur conversation;∎ he cut in on me to ask a question il m'a coupé la parole pour poser une question;∎ figurative the new store is cutting in on our business le nouveau magasin nous fait perdre de la clientèle∎ the taxi cut in on them le taxi leur a fait une queue de poisson∎ mind if I cut in? vous permettez que je vous emprunte votre partenaire?∎ (include) we should cut him in on the deal nous devrions l'intéresser à l'affaire∎ to cut into a conversation intervenir dans ou interrompre brusquement la conversation∎ to cut into one's savings entamer ses économies;∎ this work cuts into my free time ce travail empiète sur mes heures de loisir∎ they cut off the king's head ils ont décapité le roi;∎ he was cut off in his prime il a été emporté à la fleur de l'âge;∎ she cut off her nose to spite her face elle s'est fait du tort en voulant se venger(b) (interrupt → speaker) interrompre, couper;∎ he was cut off in mid sentence il a été interrompu au milieu de sa phrase(c) (disconnect, discontinue) couper;∎ Telecommunications he's been cut off (during conversation) il a été coupé; (disconnected) on lui a coupé le téléphone;∎ they cut off the electricity or power ils ont coupé le courant;∎ they cut off his allowance ils lui ont coupé les vivres;∎ her family cut her off without a penny sa famille l'a déshéritée;∎ it cut off the supply of blood to the brain cela a empêché l'irrigation du cerveau(d) (separate, isolate) isoler;∎ the house was cut off by snow drifts la maison était isolée par des congères;∎ he cut himself off from his family il a rompu avec sa famille;∎ housewives often feel cut off les femmes au foyer se sentent souvent isolées(e) (bar passage of) couper la route à;∎ the police cut off the thief la police a barré le passage au voleur;∎ the battalion cut off the enemy's retreat le bataillon a coupé la retraite à l'ennemi➲ cut out∎ a valley cut out by the river une vallée creusée par le fleuve;∎ figurative to be cut out for sth être fait pour qch, avoir des dispositions pour qch;∎ I'm not cut out for living abroad je ne suis pas fait pour vivre à l'étranger;∎ he's not cut out to be a politician il n'a pas l'étoffe d'un homme politique;∎ you have your work cut out for you vous avez du pain sur la planche ou de quoi vous occuper;∎ she'll have her work cut out to finish the report on time elle va avoir du mal à finir le rapport à temps∎ advertisements cut out from or of the paper des annonces découpées dans le journal∎ unnecessary expense must be cut out il faut éliminer ou supprimer les frais superflus;∎ they cut out all references to the president ils ont supprimé toute référence au président;∎ try and cut out all unnecessary details essayez de supprimer tous les détails superflus;∎ he cut out smoking il a arrêté de fumer;∎ cut out the screaming! arrête de crier!, assez crié!;∎ familiar cut it out! ça suffit!, ça va comme ça!∎ his father cut him out of his will son père l'a rayé de son testament;∎ they cut him out of his share ils lui ont escroqué sa part➲ cut up(b) (usu passive) familiar (affect deeply) she's really cut up about her dog's death la mort de son chien a été un coup pour elle□ ;∎ he's very cut up about it ça l'a beaucoup affecté□∎ that really cut me up! ça m'a fait rire!□∎ to cut up rough se mettre en rogne ou en boule -
42 gate
gate [geɪt]1 noun(a) (into garden) porte f; (into driveway, field) barrière f; (bigger → of mansion) portail m; (→ into courtyard) porte f cochère; (low) portillon m; (wrought iron) grille f;∎ the main gate la porte ou l'entrée f principale;∎ the gates of heaven/hell les portes fpl du paradis/de l'enfer;∎ to pay at the gate (for match) payer à l'entrée;(b) (at airport) porte f;∎ proceed to gate 22 embarquement porte 22(c) (on ski slope) porte f∎ lock gates écluse f, portes fpl d'écluse∎ there was a good/poor gate il y a eu beaucoup/peu de spectateurs;∎ the match needed a gate of 50,000 to break even il fallait 50 000 spectateurs au match pour que le club rentre dans ses frais(f) Electronics gâchette f(g) Photography fenêtre f∎ (starting) gate starting-gate f(j) (of karabiner) doigt m∎ to be gated se faire consigner►► gate lodge loge f du portier;gate money recette f, montant m des entréesⓘ - GATE Le scandale du Watergate qui secoua les États-Unis en 1972 a eu un effet non seulement sur la politique américaine mais également sur la langue anglaise. En effet, le terme "Watergate" a engendré toute une série de dérivés où le suffixe "-gate" est associé à un nom ou incident synonyme de scandale public. "Irangate" et "Contragate" renvoient respectivement à la vente illégale d'armes par le gouvernement Reagan au gouvernement iranien au milieu des années 80, et au financement de la campagne terroriste menée contre l'État nicaraguayen grâce à l'argent ainsi obtenu. "Dianagate" fait référence à la parution dans la presse britannique de conversations téléphoniques d'un caractère très intime entre la Princesse Diana et un ami. "Monicagate" évoque la mise en accusation et le procès du président américain Clinton en 1998 à la suite de sa liaison avec la jeune assistante Monica Lewinsky. -
43 open
open ['əʊpən]ouvert ⇒ 1 (a)-(d), 1 (n), 1 (o), 1 (q)-(s) découvert ⇒ 1 (e) dégagé ⇒ 1 (g) vacant ⇒ 1 (h) libre ⇒ 1 (h) non résolu ⇒ 1 (k) franc ⇒ 1 (n) ouvrir ⇒ 2 (a)-(g), 3 (d) déboucher ⇒ 2 (a) commencer ⇒ 2 (e), 3 (e) engager ⇒ 2 (e) dégager ⇒ 2 (g) s'ouvrir ⇒ 3 (a)-(c)(a) (not shut → window, cupboard, suitcase, jar, box, sore, valve) ouvert;∎ her eyes were slightly open/wide open ses yeux étaient entrouverts/grands ouverts;∎ he kicked the door open il a ouvert la porte d'un coup de pied;∎ the panels slide open les panneaux s'ouvrent en coulissant;∎ to smash/lever sth open ouvrir qch en le fracassant/à l'aide d'un levier;∎ I can't get the bottle open je n'arrive pas à ouvrir la bouteille;∎ there's a bottle already open in the fridge il y a une bouteille entamée dans le frigo;∎ you won't need the key, the door's open tu n'auras pas besoin de la clef, la porte est ouverte(b) (not fastened → coat, fly, packet) ouvert;∎ his shirt was open to the waist sa chemise était ouverte ou déboutonnée jusqu'à la ceinture;∎ his shirt was open at the neck le col de sa chemise était ouvert;∎ her blouse hung open son chemisier était déboutonné;∎ the wrapping had been torn open l'emballage avait été arraché ou déchiré(c) (spread apart, unfolded → arms, book, magazine, umbrella) ouvert; (→ newspaper) ouvert, déplié; (→ legs, knees) écarté;∎ the book lay open at page 6 le livre était ouvert à la page 6;∎ I dropped the coin into his open hand or palm j'ai laissé tomber la pièce de monnaie dans le creux de sa main;∎ the seams had split open les coutures avaient craqué;∎ he ran into my open arms il s'est précipité dans mes bras(d) (for business) ouvert;∎ I couldn't find a bank open je n'ai pas pu trouver une banque qui soit ouverte;∎ are you open on Saturdays? ouvrez-vous le samedi?;∎ we're open for business as usual nous sommes ouverts comme à l'habitude;∎ open to the public (museum etc) ouvert ou accessible au public;∎ open late ouvert en nocturne(e) (not covered → carriage, wagon, bus) découvert; (→ car) décapoté; (→ grave) ouvert; (→ boat) ouvert, non ponté; (→ courtyard, sewer) à ciel ouvert;∎ the passengers sat on the open deck les passagers étaient assis sur le pont;∎ the wine should be left open to breathe il faut laisser la bouteille ouverte pour que le vin puisse respirer(f) (not enclosed → hillside, plain)∎ the shelter was open on three sides l'abri était ouvert sur trois côtés;∎ the hill was open to the elements la colline était exposée à tous les éléments;∎ our neighbourhood lacks open space notre quartier manque d'espaces verts;∎ the wide open spaces of Texas les grands espaces du Texas;∎ shanty towns sprang up on every scrap of open ground des bidonvilles ont surgi sur la moindre parcelle de terrain vague;∎ they were attacked in open country ils ont été attaqués en rase campagne;∎ open countryside stretched away to the horizon la campagne s'étendait à perte de vue;∎ open grazing land pâturages mpl non clôturés;∎ ahead lay a vast stretch of open water au loin s'étendait une vaste étendue d'eau;∎ in the open air en plein air;∎ nothing beats life in the open air il n'y a rien de mieux que la vie au grand air;∎ he took to the open road il a pris la route;∎ it'll do 150 on the open road elle monte à 150 sur l'autoroute;∎ the open sea la haute mer, le large(g) (unobstructed → road, passage) dégagé; (→ mountain pass) ouvert, praticable; (→ waterway) ouvert à la navigation; (→ view) dégagé;∎ only one lane on the bridge is open il n'y a qu'une voie ouverte à la circulation sur le pont∎ we have two positions open nous avons deux postes à pourvoir;∎ I'll keep this Friday open for you je vous réserverai ce vendredi;∎ she likes to keep her weekends open elle préfère ne pas faire de projets pour le week-end;∎ it's the only course of action open to us c'est la seule chose que nous puissions faire;∎ she used every opportunity open to her elle a profité de toutes les occasions qui se présentaient à elle;∎ he wants to keep his options open il ne veut pas s'engager(i) (unrestricted → competition) ouvert (à tous); (→ meeting, trial) public; (→ society) ouvert, démocratique;∎ the contest is not open to company employees le concours n'est pas ouvert au personnel de la société;∎ club membership is open to anyone aucune condition particulière n'est requise pour devenir membre du club;∎ a career open to very few une carrière accessible à très peu de gens ou très fermée;∎ there are few positions of responsibility open to immigrants les immigrés ont rarement accès aux postes de responsabilité;∎ the field is wide open for someone with your talents pour quelqu'un d'aussi doué que vous, ce domaine offre des possibilités quasi illimitées;∎ to extend an open invitation to sb inviter qn à venir chez soi quand il le souhaite;∎ it's an open invitation to tax-dodgers/thieves c'est une invitation à la fraude fiscale/aux voleurs;∎ American familiar Reno was a pretty open town in those days à cette époque, Reno était aux mains des hors-la-loi□ ;∎ they have an open marriage ils forment un couple très libre∎ the two countries share miles of open border les deux pays sont séparés par des kilomètres de frontière non matérialisée;∎ Sport he missed an open goal il n'y avait pas de défenseurs, et il a raté le but;∎ to lay oneself open to criticism prêter le flanc à la critique(k) (undecided → question) non résolu, non tranché;∎ the election is still wide open l'élection n'est pas encore jouée;∎ it's still an open question whether he'll resign or not on ne sait toujours pas s'il va démissionner;∎ I prefer to leave the matter open je préfère laisser cette question en suspens;∎ he wanted to leave the date open il n'a pas voulu fixer de date∎ his speech is open to misunderstanding son discours peut prêter à confusion;∎ the prices are not open to negotiation les prix ne sont pas négociables;∎ the plan is open to modification le projet n'a pas encore été finalisé;∎ it's open to debate whether she knew about it or not on peut se demander si elle était au courant;∎ open to doubt douteux∎ to be open to suggestions être ouvert aux suggestions;∎ I don't want to go but I'm open to persuasion je ne veux pas y aller mais je pourrais me laisser persuader;∎ I try to keep an open mind about such things j'essaie de ne pas avoir de préjugés sur ces questions;∎ open to any reasonable offer disposé à considérer toute offre raisonnable∎ let's be open with each other soyons francs l'un avec l'autre;∎ they weren't very open about their intentions ils se sont montrés assez discrets en ce qui concerne leurs intentions;∎ he is open about his homosexuality il ne cache pas son homosexualité(o) (blatant → contempt, criticism, conflict, disagreement) ouvert; (→ attempt) non dissimulé; (→ scandal) public; (→ rivalry) déclaré;∎ her open dislike son aversion déclarée;∎ the country is in a state of open civil war le pays est en état de véritable guerre civile;∎ they are in open revolt ils sont en révolte ouverte;∎ they acted in open violation of the treaty ce qu'ils ont fait constitue une violation flagrante du traité;∎ they showed an open disregard for the law ils ont fait preuve d'un manque de respect flagrant face à la loi;∎ it's an open admission of guilt cela équivaut à un aveu(p) (loose → weave) lâche(a) (window, lock, shop, eyes, border) ouvrir; (wound) rouvrir; (bottle, can) ouvrir, déboucher; (wine) déboucher;∎ open quotations or inverted commas ouvrez les guillemets;∎ she opened her eyes very wide elle ouvrit grand les yeux, elle écarquilla les yeux;∎ they plan to open the border to refugees ils projettent d'ouvrir la frontière aux réfugiés;∎ Photography open the aperture one more stop ouvrez d'un diaphragme de plus;∎ figurative to open one's heart to sb se confier à qn;∎ we must open our minds to new ideas nous devons être ouverts aux idées nouvelles(b) (unfasten → coat, envelope, gift, collar) ouvrir(c) (unfold, spread apart → book, umbrella, penknife, arms, hand) ouvrir; (→ newspaper) ouvrir, déplier; (→ legs, knees) écarter∎ to open a road through the jungle ouvrir une route à travers la jungle;∎ the agreement opens the way for peace l'accord va mener à la paix(e) (start → campaign, discussion, account, trial) ouvrir, commencer; (→ negotiations) ouvrir, engager; (→ conversation) engager, entamer; Banking & Finance (→ account, loan) ouvrir;∎ her new film opened the festival son dernier film a ouvert le festival;∎ to open a file on sb ouvrir un dossier sur qn;∎ to open fire (on or at sb) ouvrir le feu (sur qn);∎ to open the bidding (in bridge) ouvrir (les enchères);∎ to open the betting (in poker) lancer les enchères;∎ Finance to open a line of credit ouvrir un crédit;∎ to open Parliament ouvrir la session du Parlement;∎ Law to open the case exposer les faits∎ the window opens outwards la fenêtre (s')ouvre vers l'extérieur;∎ open wide! ouvrez grand!;∎ to open, press down and twist pour ouvrir, appuyez et tournez;∎ both rooms open onto the corridor les deux chambres donnent ou ouvrent sur le couloir;∎ figurative the heavens opened and we got drenched il s'est mis à tomber des trombes d'eau et on s'est fait tremper(b) (unfold, spread apart → book, umbrella, parachute) s'ouvrir; (→ bud, leaf) s'ouvrir, s'épanouir;∎ a new life opened before her une nouvelle vie s'ouvrait devant elle(c) (gape → chasm) s'ouvrir(d) (for business) ouvrir;∎ what time do you open on Sundays? à quelle heure ouvrez-vous le dimanche?;∎ the doors open at 8 p.m. les portes ouvrent à 20 heures;∎ to open late ouvrir en nocturne(e) (start → campaign, meeting, discussion, concert, play, story) commencer;∎ the book opens with a murder le livre commence par un meurtre;∎ the hunting season opens in September la chasse ouvre en septembre;∎ she opened with a statement of the association's goals elle commença par une présentation des buts de l'association;∎ the film opens next week le film sort la semaine prochaine;∎ Theatre when are you opening? quand aura lieu la première?;∎ when it opened on Broadway, the play flopped lorsqu'elle est sortie à Broadway, la pièce a fait un four;∎ the Dow Jones opened at 2461 le Dow Jones a ouvert à 2461;∎ to open with two clubs (in bridge) ouvrir de deux trèfles4 noun(a) (outdoors, open air)∎ eating (out) in the open gives me an appetite manger au grand air me donne de l'appétit;∎ to sleep in the open dormir à la belle étoile∎ to bring sth (out) into the open exposer ou étaler qch au grand jour;∎ the riot brought the instability of the regime out into the open l'émeute a révélé l'instabilité du régime;∎ the conflict finally came out into the open le conflit a finalement éclaté au grand jour∎ the British Open (golf) l'open m ou le tournoi open de Grande-Bretagne;∎ the French Open (tennis) Roland-Garros►► Banking open account compte m ouvert;open bar buvette f gratuite, bar m gratuit;Banking open cheque chèque m ouvert ou non barré;School open classroom classe f primaire à activités libres;Stock Exchange open contract position f ouverte;Finance open credit crédit m à découvert;British open day journée f portes ouvertes;Economics open economy économie f ouverte;∎ British to keep open house tenir table ouverte;open inquiry enquête f publique;British open learning enseignement m à la carte (par correspondance ou à temps partiel);open letter lettre f ouverte;∎ an open letter to the President une lettre ouverte au Président;open market marché m libre;∎ to buy sth on the open market acheter qch sur le marché libre;∎ Stock Exchange to buy shares on the open market acheter des actions en Bourse;open mike = période pendant laquelle les clients d'un café-théâtre ou d'un bar peuvent chanter ou raconter des histoires drôles au micro;open mesh mailles fpl lâches;Stock Exchange open money market marché m libre des capitaux;Stock Exchange open outcry criée f;Stock Exchange open outcry system système m de criée;open pattern motif m aéré;Insurance open policy police f flottante;Stock Exchange open position position f ouverte;open prison prison f ouverte;open season saison f;∎ the open season for hunting la saison de la chasse;∎ figurative the tabloid papers have declared open season on the private lives of rock stars les journaux à scandale se sont mis à traquer les stars du rock dans leur vie privée;British open secret secret m de Polichinelle;∎ it's an open secret that Alison will get the job c'est Alison qui aura le poste, ce n'est un secret pour personne;sésame, ouvre-toi!2 nounBritish (means to success) sésame m;∎ good A level results aren't necessarily an open sesame to university de bons résultats aux "A levels" n'ouvrent pas forcément la porte de l'université;Industry open shop British (open to non-union members) = entreprise ne pratiquant pas le monopole d'embauche; American (with no union) établissement m sans syndicat;open ticket billet m open;Sport open tournament (tournoi m) open m;British Open University = enseignement universitaire par correspondance doublé d'émissions de télévision ou de radio;Law open verdict verdict m de décès sans cause déterminée➲ open out∎ the sofa opens out into a bed le canapé est convertible en lit;∎ the doors open out onto a terrace les portes donnent ou s'ouvrent sur une terrasse(b) (lie → vista, valley) s'étendre, s'ouvrir;∎ miles of wheatfields opened out before us des champs de blé s'étendaient devant nous à perte de vue(c) (widen → path, stream) s'élargir;∎ the river opens out into a lake la rivière se jette dans un lac;∎ the trail finally opens out onto a plateau la piste débouche sur un plateau∎ he opened out after a few drinks quelques verres ont suffi à le faire sortir de sa réserve(unfold → newspaper, deck chair, fan) ouvrir;∎ the peacock opened out its tail le paon a fait la roue➲ open up(a) (unlock the door) ouvrir;∎ open up or I'll call the police! ouvrez, sinon j'appelle la police!;∎ open up in there! ouvrez, là-dedans!(b) (become available → possibility) s'ouvrir;∎ we may have a position opening up in May il se peut que nous ayons un poste disponible en mai;∎ new markets are opening up de nouveaux marchés sont en train de s'ouvrir(c) (for business → shop, branch etc) (s')ouvrir;∎ a new hotel opens up every week un nouvel hôtel ouvre ses portes chaque semaine∎ he won't open up even to me il ne s'ouvre pas, même à moi;∎ he needs to open up about his feelings il a besoin de dire ce qu'il a sur le cœur ou de s'épancher;∎ I got her to open up about her doubts j'ai réussi à la convaincre de me faire part de ses doutes(f) (become interesting) devenir intéressant;∎ things are beginning to open up in my field of research ça commence à bouger dans mon domaine de recherche;∎ the game opened up in the last half le match est devenu plus ouvert après la mi-temps(a) (crate, gift, bag, tomb) ouvrir;∎ we're opening up the summer cottage this weekend nous ouvrons la maison de campagne ce week-end;∎ the sleeping bag will dry faster if you open it up le sac de couchage séchera plus vite si tu l'ouvres(b) (for business) ouvrir;∎ each morning, Lucy opened up the shop chaque matin, Lucy ouvrait la boutique;∎ he wants to open up a travel agency il veut ouvrir une agence de voyages(c) (for development → isolated region) désenclaver; (→ quarry, oilfield) ouvrir, commencer l'exploitation de; (→ new markets) ouvrir;∎ irrigation will open up new land for agriculture l'irrigation permettra la mise en culture de nouvelles terres;∎ the airport opened up the island for tourism l'aéroport a ouvert l'île au tourisme;∎ a discovery which opens up new fields of research une découverte qui crée de nouveaux domaines de recherche;∎ the policy opened up possibilities for closer cooperation la politique a créé les conditions d'une coopération plus étroite∎ he opened it or her up il a accéléré à fond -
44 sit
sit [sɪt]asseoir ⇒ 1 (a) faire asseoir ⇒ 1 (b) passer ⇒ 1 (c), 2 (f) s'asseoir ⇒ 2 (a) être assis ⇒ 2 (a) poser ⇒ 2 (b) être en séance ⇒ 2 (d) garder les enfants ⇒ 2 (e) être ⇒ 2 (g) se trouver ⇒ 2 (g) rester ⇒ 2 (a), 2 (h)∎ he sat the child in the pram/on his knee il a assis l'enfant dans le landau/sur ses genoux(b) (invite to be seated) faire asseoir;∎ she sat me in the waiting room elle m'a fait asseoir dans la salle d'attente∎ to sit a horse badly/well monter (un cheval) mal/bien, avoir une mauvaise/bonne assiette∎ with an impudent air that sat him ill d'un air effronté qui lui seyait mal∎ she came and sat next to me elle est venue s'asseoir à côté de moi;∎ she sat by me all evening elle était assise à côté de moi toute la soirée;∎ sit in the back of the car mettez-vous à l'arrière (de la voiture);∎ she was sitting reading elle était assise à lire ou en train de lire;∎ where would you like me to sit?, where shall I sit? où est-ce que je me mets?;∎ they were sitting at (the) table ils étaient à table, ils étaient attablés;∎ we usually sit in the living room nous sommes d'ordinaire dans le salon;∎ sit still! tiens-toi ou reste tranquille!;∎ sit! (to dog) assis!;∎ they sat over the meal for hours ils sont restés à table pendant des heures;∎ to sit at home, American to sit home rester à la maison;∎ don't think I'm just going to sit and wait for you! ne t'imagine pas que je vais rester là à t'attendre!;∎ he sits in front of the television all day il passe toute la journée devant la télévision;∎ familiar sit tight, I'll be back in a moment ne bouge pas, je reviens tout de suite;∎ we just have to sit tight and wait for things to get better on ne peut qu'attendre patiemment que les choses s'arrangent∎ she sat for Modigliani elle a posé pour Modigliani∎ to sit on a board faire partie ou être membre d'un conseil d'administration;∎ he sat for Swansea il était député de Swansea(d) (be in session) être en séance, siéger;∎ the council was still sitting at midnight à minuit, le conseil siégeait toujours ou était toujours en séance;∎ the House sits for another two months la session de la Chambre doit durer encore deux mois∎ I'll ask Amy to sit for us je demanderai à Amy de garder les enfants□ ;∎ she's sitting for the neighbours elle garde les enfants des voisins□∎ to sit for an exam se présenter à ou passer un examen∎ the houses sit nestled in a beautiful valley les maisons sont nichées ou blotties dans une belle vallée;∎ a clock sat on the mantelpiece une horloge était posée sur la cheminée;∎ your keys are sitting right in front of you tes clés sont là, devant ton nez;∎ her mail sat in a pile on her desk son courrier était empilé sur son bureau;∎ a tank sat in the middle of the road un char d'assaut était planté au milieu de la route;∎ literary joy sat on every countenance la joie régnait sur tous les visages;∎ literary the wind sits in the east le vent vient de l'est(h) (remain inactive or unused) rester;∎ the plane sat waiting on the runway l'avion attendait sur la piste;∎ the letter sat unopened la lettre n'avait pas été ouverte(i) (fit → coat, dress) tomber;∎ the jacket sits well on you la veste vous va parfaitement;∎ the collar should sit flat le col devrait rester à plat;∎ figurative age sits well on him la maturité lui va bien;∎ the thought sat uneasily on my conscience cette pensée me pesait sur la conscience∎ they take turns sitting on the eggs ils couvent les œufs à tour de rôlerester à ne rien faire, traîner;∎ she just sits around (the house) all day elle reste toute la journée à la maison à ne rien faire;∎ I'm not going to sit around waiting for you je ne vais pas passer mon temps à t'attendre∎ to sit back (in an armchair) se caler ou s'installer confortablement dans un fauteuil;∎ I sat back against the cushions je me suis calé contre les coussins;∎ just sit back and close your eyes installe-toi bien et ferme les yeux;∎ sit back and enjoy it détends-toi et profites-en∎ I can't just sit back and watch! je ne peux pas rester là à regarder sans rien faire!;∎ he just sits back and lets the others do the work il regarde les autres travailler sans lever le petit doigt;∎ we can't just sit back and ignore the danger nous ne pouvons tout de même pas faire comme s'il n'y avait pas de dangerrester sans rien faire;∎ how can you sit by while others suffer? comment peux-tu rester sans rien faire quand d'autres souffrent?➲ sit down(place → person) asseoir, installer;∎ he sat himself down beside me il s'est assis à côté de moi;∎ sit yourself down and have a drink asseyez-vous et prenez un verres'asseoir;∎ please sit down asseyez-vous, je vous en prie;∎ to be sitting down être assis;∎ I was just sitting down to work when the phone rang j'étais sur le point de me mettre au travail quand le téléphone a sonné;∎ to sit down to table se mettre à table, s'attabler;∎ to sit down to a game of bridge s'installer pour faire une partie de bridge;∎ I think we should sit down and talk about it je crois qu'il faut qu'on en discute ou parle;∎ the two sides have decided to sit down together at the negotiating table les deux camps ont décidé de s'asseoir à la table des négociations∎ do you mind if I sit in for a while? cela vous ennuie-t-il si je reste à écouter un moment?;∎ to sit in on a meeting/a class assister à une réunion/un cours∎ to sit in for sb remplacer qn(c) (hold a demonstration) faire un sit-in(a) (suppress, quash → file, report) garder le silence sur□ ; (→ suggestion, proposal) repousser□, rejeter□ ;∎ any new initiative is promptly sat on on décourage rapidement toute nouvelle initiative□(b) (take no action on) ne pas s'occuper de□ ;∎ his office has been sitting on those recommendations for months now ça fait des mois que son bureau a ces recommandations sous le coude;∎ they mustn't sit on their one-goal lead il ne faut pas qu'ils s'endorment sur leurs lauriers maintenant qu'ils ont un but d'avance➲ sit out∎ it was very boring but I sat it out c'était très ennuyeux, mais je suis restée jusqu'au bout∎ I think I'll sit the next one out (dance) je crois que je ne vais pas danser la prochaine danse; (in cards) je crois que je ne jouerai pas la prochaine main(sit outside) s'asseoir ou se mettre dehors; (be seated outside) être assis dehorsattendre la fin de;∎ he sat through the whole play il est resté jusqu'à la fin de la pièce;∎ I can't bear to sit through another of his speeches je ne supporterai pas un autre de ses discours;∎ we had to sit through two hours of Wagner nous avons dû nous payer deux heures de Wagner;∎ we sat through dinner in silence nous avons passé tout le dîner sans rien dire➲ sit up∎ she was sitting up in bed reading elle lisait, assise dans son lit;∎ the baby can sit up now le bébé peut se tenir assis maintenant;∎ sit up straight! redresse-toi!, tiens-toi droit!;∎ figurative to make sb sit up secouer qn, secouer les puces à qn;∎ the public began to sit up and take notice le public a commencé à montrer un certain intérêt;∎ her competitors are beginning to sit up and take notice ses concurrents commencent à prendre conscience de son existence(b) (not go to bed) rester debout, ne pas se coucher;∎ don't bother sitting up for me ne m'attendez pas;∎ I sat up watching TV until 3 a.m. j'ai regardé la télé jusqu'à 3 heures du matin;∎ I'll sit up with her until the fever passes je vais rester avec elle jusqu'à ce que sa fièvre tombe(child, patient) asseoir, redresser;∎ to sit sb up against a wall adosser qn contre un murⓘ Are you sitting comfortably? (Then I'll begin) Cette expression ("Êtes-vous assis confortablement? Je peux donc commencer") est la formule d'introduction classique que l'on prononce avant de raconter une histoire à des enfants. Le narrateur de l'émission de radio britannique Listen with Mother l'employait systématiquement avant chaque récit. Aujourd'hui, cette expression témoigne d'une attitude quelque peu condescendante de la part de celui qui l'emploie. On l'utilise lorsqu'on veut capter l'attention de personnes inattentives ou bien sur le mode humoristique avant un discours. -
45 subject
∎ on the subject of au sujet de, à propos de;∎ this will be the subject of my next lecture ma prochaine conférence portera sur ce sujet;∎ to wander from the subject s'écarter du sujet, faire une digression;∎ let's come or get back to the subject revenons à nos moutons;∎ don't try and change the subject n'essaie pas de changer de sujet ou de détourner la conversation;∎ let's drop the subject parlons d'autre chose;∎ while we're on the subject à (ce) propos;∎ while we're on the subject of holidays puisque nous parlons de vacances;∎ that's a touchy subject c'est un sujet délicat(b) (of legal case, contract) objet m;∎ (in letters and memos) subject: recruitment of new staff objet: recrutement de personnel∎ the subject of her film/novel le sujet de son film/roman;∎ he always photographs his subjects in natural light il photographie toujours ses sujets en lumière naturelle∎ she's taking exams in four subjects elle passe des examens dans quatre matières;∎ I was always better at science subjects j'ai toujours été plus fort en sciences;∎ it's not really my subject ce n'est pas vraiment mon domaine;∎ that would be a good subject for a PhD thesis ce serait un bon sujet pour une thèse de doctorat∎ she is a British subject c'est une ressortissante britannique;∎ foreign subjects ressortissants mpl étrangers∎ she'd be a good subject for the new treatment elle serait un bon sujet pour le nouveau traitement;∎ subjects were tested for their reactions on a testé la réaction des sujets∎ he was the subject of much comment il a été l'objet de nombreux commentaires(a) (subordinate → people, country) assujetti, soumis;∎ they are subject to my authority ils sont placés sous mon autorité, ils dépendent de moi;∎ we are all subject to the rule of law nous sommes tous soumis à la loi;∎ subject states États mpl dépendants(b) (liable, prone)∎ subject to sujet à;∎ he is subject to frequent lung infections il est sujet à de fréquentes infections pulmonaires;∎ subject to attack exposé à l'attaque;∎ to be subject to violent changes of mood/fits of jealousy être sujet à de brusques sautes d'humeur/des crises de jalousie;∎ the terms are subject to alteration without notice les termes peuvent être modifiés sans préavis;∎ subject to tax imposable, assujetti à l'impôt;∎ the price is subject to a handling charge les frais de manutention sont en sus;∎ all trains will be subject to delay des retards sont à prévoir sur toutes les lignes(a) (country, people) soumettre, assujettir∎ to subject to soumettre à;∎ to subject sb/sth to an examination faire subir un examen à qn/qch, soumettre qn/qch à un examen;∎ the material was subjected to intense heat le matériau a été soumis ou exposé à une température très élevée;∎ I refuse to subject anyone to such indignities je refuse de faire subir de tels affronts à qui que ce soit;∎ their plans were subjected to much criticism leurs projets ont fait l'objet de nombreuses critiques∎ these are the rules, subject to revision voici le règlement, sous réserve de modification;∎ subject to your passing the exam à condition de réussir ou à condition que vous réussissiez l'examen;∎ it's all subject to her approval tout est subordonné à son approbation►► subject catalogue fichier m par matières;subject index index m des matières; -
46 Carlson, Chester Floyd
SUBJECT AREA: Photography, film and optics[br]b. 8 July 1906 Seattle, Washington, USAd. 19 September 1968 New York, USA[br][br]Carlson studied physics at the California Institute of Technology and in 1930 he took a research position at Bell Telephone Laboratories, but soon transferred to their patent department. To equip himself in this field, Carlson studied law, and in 1934 he became a patent attorney at P.R.Mallory \& Co., makers of electrical apparatus. He was struck by the difficulty in obtaining copies of documents and drawings; indeed, while still at school, he had encountered printing problems in trying to produce a newsletter for amateur chemists. He began experimenting with various light-sensitive substances, and by 1937 he had conceived the basic principles of xerography ("dry writing"), using the property of certain substances of losing an electrostatic charge when light impinges on them. His work for Mallory brought him into contact with the Battelle Memorial Institute, the world's largest non-profit research organization; their subsidiary, set up to develop promising ideas, took up Carlson's invention. Carlson received his first US patent for the process in 1940, with two more in 1942, and he assigned to Battelle exclusive patent rights in return for a share of any future proceeds. It was at Battelle that selenium was substituted as the light-sensitive material.In 1946 the Haloid Company of Rochester, manufacturers of photographic materials and photocopying equipment, heard of the Xerox copier and, seeing it as a possible addition to their products, took out a licence to develop it commercially. The first Xerox Copier was tested during 1949 and put on the market the following year. The process soon began to displace older methods, such as Photostat, but its full impact on the public came in 1959 with the advent of the Xerox 914 Copier. It is fair to apply the overworked word "revolution" to the change in copying methods initiated by Carlson. He became a multimillionaire from his royalties and stock holding, and in his last years he was able to indulge in philanthropic activities.[br]Further ReadingObituary, 1968, New York Times, 20 September.R.M.Schaffert, 1954, "Developments in xerography", Penrose Annual.J.Jewkes, 1969, The Sources of Invention, 2nd edn, London: Macmillan, pp. 405–8.LRD -
47 De Forest, Lee
SUBJECT AREA: Broadcasting, Electronics and information technology, Photography, film and optics, Recording, Telecommunications[br]b. 26 August 1873 Council Bluffs, Iowa, USAd. 30 June 1961 Hollywood, California, USA[br]American electrical engineer and inventor principally known for his invention of the Audion, or triode, vacuum tube; also a pioneer of sound in the cinema.[br]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.[br]Principal Honours and DistinctionsInstitute of Electronic and Radio Engineers Medal of Honour 1922. President, Institute of Electronic and Radio Engineers 1930. Institute of Electrical and Electronics Engineers Edison Medal 1946.Bibliography1904, "Electrolytic detectors", Electrician 54:94 (describes the electrolytic detector). 1907, US patent no. 841,387 (the Audion).1950, Father of Radio, Chicago: WIlcox \& Follett (autobiography).De Forest gave his own account of the development of his sound-on-film system in a series of articles: 1923. "The Phonofilm", Transactions of the Society of Motion Picture Engineers 16 (May): 61–75; 1924. "Phonofilm progress", Transactions of the Society of Motion Picture Engineers 20:17–19; 1927, "Recent developments in the Phonofilm", Transactions of the Society of Motion Picture Engineers 27:64–76; 1941, "Pioneering in talking pictures", Journal of the Society of Motion Picture Engineers 36 (January): 41–9.Further ReadingG.Carneal, 1930, A Conqueror of Space (biography).I.Levine, 1964, Electronics Pioneer, Lee De Forest (biography).E.I.Sponable, 1947, "Historical development of sound films", Journal of the Society of Motion Picture Engineers 48 (April): 275–303 (an authoritative account of De Forest's sound-film work, by Case's assistant).W.R.McLaurin, 1949, Invention and Innovation in the Radio Industry.C.F.Booth, 1955, "Fleming and De Forest. An appreciation", in Thermionic Valves 1904– 1954, IEE.V.J.Phillips, 1980, Early Radio Detectors, London: Peter Peregrinus.KF / JW -
48 Leeuwenhoek, Antoni van
[br]b. 24 October 1632 Delft, Netherlandsd. 1723 Delft, Netherlands[br]Dutch pioneer of microscopy.[br]He was the son of a basketmaker, Philip Tonisz Leeuwenhoek, and Grietje Jacobsdr van den Berch, a brewer's daughter. After the death of his father in 1637, his mother married the painter Jacob Jansz Molijn. He went to school at Warmond and, later to an uncle who was Sheriff of Benthuizen. In 1648 he went to Amsterdam, where he was placed in a linen-draper's shop owned by William Davidson, a Scottish merchant. In 1652 or 1653 he moved back to Delft, where in 1654 he married the daughter of a cloth-merchant, Barbara de Mey. They had five children, only one of whom survived (born 22 September 1656). At about this time he bought a house and shop in the Hippolytus buurt and set up in business as a draper and haberdasher. His wife died in 1666 and in 1671 he married Cornelia Swalmius, a Reformed Church minister's daughter. Lacking self-confidence and not knowing Latin, the scientific language of the day, he was reluctant to publish the results of his investigations into a multitude of natural objects. His observations were made with single-lens microscopes made by himself. (He made at least 387 microscopes with magnifications of between 30x and 266x.) Among the subjects he studied were the optic nerve of a cow, textile fibres, plant seeds, a spark from a tinderbox, the anatomy of mites and insects' blood corpuscles, semen and spermatozoa. It was the physician Reinier de Graaf who put him in touch with the Royal Society in London, with whom he corresponded for fifty years from 1673. One of his last letters, in 1723, to the Royal Society was about the histology of the rare disease of the diaphragm that he had studied in sheep and oxen and from which he died. In public service he was a chamberlain to the sheriffs of Delft, a surveyor and a wine-gauger, offices which together gave him an income of about 800 florins a year. Leeuwenhoek never wrote a book, but collections were published in Latin and in Dutch from his scientific letters, which numbered more than 250.[br]Principal Honours and DistinctionsFRS 1680.Further ReadingL.C.Palm and H.A.M.Snelders, Antoni van Leeuwenhoek 1632–1723: Studies in the Life and Work of the Delft Scientist, Commemorating the 350th Anniversary of his Birthday.B.Bracegirdle (ed.), Beads of Glass: Leeuwenhoek and the Early Microscope. (Catalogue of an exhibition in the Museum Boerhaave, November 1982 to May 1983, and in the Science Museum, May to October 1983).IMcNBiographical history of technology > Leeuwenhoek, Antoni van
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49 Maxwell, James Clerk
[br]b. 13 June 1831 Edinburgh, Scotlandd. 5 November 1879 Cambridge, England[br]Scottish physicist who formulated the unified theory of electromagnetism, the kinetic theory of gases and a theory of colour.[br]Maxwell attended school at the Edinburgh Academy and at the age of 16 went on to study at Edinburgh University. In 1850 he entered Trinity College, Cambridge, where he graduated four years later as Second Wrangler with the award of the Smith's Prize. Two years later he was appointed Professor at Marischal College, Aberdeen, where he married the Principal's daughter. In 1860 he moved to King's College London, but on the death of his father five years later, Maxwell returned to the family home in Scotland, where he continued his researches as far as the life of a gentleman farmer allowed. This rural existence was interrupted in 1874 when he was persuaded to accept the chair of Cavendish Professor of Experimental Physics at Cambridge. Unfortunately, in 1879 he contracted the cancer that brought his brilliant career to an untimely end. While at Cambridge, Maxwell founded the Cavendish Laboratory for research in physics. A succession of distinguished physicists headed the laboratory, making it one of the world's great centres for notable discoveries in physics.During the mid-1850s, Maxwell worked towards a theory to explain electrical and magnetic phenomena in mathematical terms, culminating in 1864 with the formulation of the fundamental equations of electromagnetism (Maxwell's equations). These equations also described the propagation of light, for he had shown that light consists of transverse electromagnetic waves in a hypothetical medium, the "ether". This great synthesis of theories uniting a wide range of phenomena is worthy to set beside those of Sir Isaac Newton and Einstein. Like all such syntheses, it led on to further discoveries. Maxwell himself had suggested that light represented only a small part of the spectrum of electromagnetic waves, and in 1888 Hertz confirmed the discovery of another small part of the spectrum, radio waves, with momentous implications for the development of telecommunication technology. Maxwell contributed to the kinetic theory of gases, which by then were viewed as consisting of a mass of randomly moving molecules colliding with each other and with the walls of the containing vessel. From 1869 Maxwell applied statistical methods to describe the molecular motion in mathematical terms. This led to a greater understanding of the behaviour of gases, with important consequences for the chemical industry.Of more direct technological application was Maxwell's work on colour vision, begun in 1849, showing that all colours could be derived from the three primary colours, red, yellow and blue. This enabled him in 1861 to produce the first colour photograph, of a tartan. Maxwell's discoveries about colour vision were quickly taken up and led to the development of colour printing and photography.[br]BibliographyMost of his technical papers are reprinted in The Scientific Papers of J.Clerk Maxwell, 1890, ed. W.D.Niven, Cambridge, 2 vols; reprinted 1952, New York.Maxwell published several books, including Theory of Heat, 1870, London (1894, 11th edn, with notes by Lord Rayleigh) and Theory of Electricity and Magnetism, 1873, Oxford (1891, ed. J.J.Thomson, 3rd edn).Further ReadingL.Campbell and W.Garnett, 1882, The Life of James Clerk Maxwell, London (the standard biography).J.J.Thomson (ed.), 1931, James Clerk Maxwell 1831–1931, Cambridge. J.G.Crowther, 1932, British Scientists of the Nineteenth Century, London.LRD -
50 Reichenbach, Georg Friedrich von
SUBJECT AREA: Mechanical, pneumatic and hydraulic engineering, Photography, film and optics, Public utilities[br]b. 24 August 1772 Durlach, Baden, Germanyd. 21 May 1826 Munich, Germany[br]German engineer.[br]While he was attending the Military School at Mannheim, Reichenbach drew attention to himself due to the mathematical instruments that he had designed. On the recommendation of Count Rumford in Munich, the Bavarian government financed a two-year stay in Britain so that Reichenbach could become acquainted with modern mechanical engineering. He returned to Mannheim in 1793, and during the Napoleonic Wars he was involved in the manufacture of arms. In Munich, where he was in the service of the Bavarian state from 1796, he started producing precision instruments in his own time. His basic invention was the design of a dividing machine for circles, produced at the end of the eighteenth century. The astronomic and geodetic instruments he produced excelled all the others for their precision. His telescopes in particular, being perfect in use and of solid construction, soon brought him an international reputation. They were manufactured at the MathematicMechanical Institute, which he had jointly founded with Joseph Utzschneider and Joseph Liebherr in 1804 and which became a renowned training establishment. The glasses and lenses were produced by Joseph Fraunhofer who joined the company in 1807.In the same year he was put in charge of the technical reorganization of the salt-works at Reichenhall. After he had finished the brine-transport line from Reichenhall to Traunstein in 1810, he started on the one from Berchtesgaden to Reichenhall which was an extremely difficult task because of the mountainous area that had to be crossed. As water was the only source of energy available he decided to use water-column engines for pumping the brine in the pipes of both lines. Such devices had been in use for pumping purposes in different mining areas since the middle of the eighteenth century. Reichenbach knew about the one constructed by Joseph Karl Hell in Slovakia, which in principle had just been a simple piston-pump driven by water which did not work satisfactorily. Instead he constructed a really effective double-action water-column engine; this was a short time after Richard Trevithick had constructed a similar machine in England. For the second line he improved the system and built a single-action pump. All the parts of it were made of metal, which made them easy to produce, and the pumps proved to be extremely reliable, working for over 100 years.At the official opening of the line in 1817 the Bavarian king rewarded him generously. He remained in the state's service, becoming head of the department for roads and waterways in 1820, and he contributed to the development of Bavarian industry as well as the public infrastructure in many ways as a result of his mechanical skill and his innovative engineering mind.[br]Further ReadingBauernfeind, "Georg von Reichenbach" Allgemeine deutsche Biographie 27:656–67 (a reliable nineteenth-century account).W.Dyck, 1912, Georg v. Reichenbach, Munich.K.Matschoss, 1941, Grosse Ingenieure, Munich and Berlin, 3rd edn. 121–32 (a concise description of his achievements in the development of optical instruments and engineering).WKBiographical history of technology > Reichenbach, Georg Friedrich von
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51 Röntgen, Wilhelm Conrad
[br]b. 27 March 1845 Lennep, Prussia (now Remscheid, Germany)d. 10 February 1923 Munich, Germany[br]German physicist who discovered X-rays.[br]Expelled from school and so unable to attend university, Röntgen studied engineering at Zurich Polytechnic. After graduation he obtained a post as assistant to the distinguished German physicist Kundt and eventually secured an appointment at the University of Würzburg in Bavaria. He was successively Professor of Physics at the universities of Strasbourg (1876), Giessen (1879), Würzburg (1888) and Munich (1900–20), but he died in abject poverty. At various times he studied piezo-electricity; heat absorption by and the specific heat of gases; heat conduction in crystals; elasticity; and the capillary action of fluids. In 1895, whilst experimenting with the Crookes tube, a partially evacuated tube invented some seven years earlier, he observed that when a high voltage was applied across the tube, a nearby piece of barium platinocyanide produced light. He theorized that when the so-called cathode rays produced by the tube (electrons, as we now know) struck the glass wall, some unknown radiation occurred that was able to penetrate light materials and affect photographic plates. These he called X-rays (they also became known as Röntgen rays), but he believed (erroneously) that they bore no relation to light rays. For this important discovery he was awarded the Nobel Prize for Physics, but, sadly, he died in abject poverty during the hyperinflation of the 1920s.[br]Principal Honours and DistinctionsFirst Nobel Prize for Physics 1901.Bibliography1895, "A new kind of radiation", Meeting of the Würzburg Physical-Medical Society (December) (reported Röntgen's discovery of X-rays).Further ReadingO.Glasser, 1945, Dr. W.C.Röntgen (biography).KFBiographical history of technology > Röntgen, Wilhelm Conrad
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