182 



VOCABULARY. 



pompc centrifuge, centrifugal 

 pump. 



de compression, condensing- 

 pump. 



pont suspendu, suspension-bridge. 



porosite, porosity. 



porphyre, porphyry. 



port d'embarquement, port of de- 

 parture. 



ported, length, span. 



porte-balai, broom-stick. 



potasse, potash. 



poudre de guerre, gun-powder. 



poulie, pulley. 



poutre, girder, beam. 



cloisonne'e, chambered beam. 



moufle'e, tackle. 

 poutrelle, joist, little beam, 

 precipitation, precipitation. 



In chemistry, the process by which 

 any substance is made to separate from 

 another or others in solution, and fall 

 to the bottom. 



precipite, precipitate. 



Any substance which, having been 

 dissolved in a fluid, falls to the bottom 

 of the vessel on the addition of some 

 other substance capable of producing 

 decomposition of the compound. 



pre*cipiter, to precipitate. 

 pression atmosphe'rique, atmos- 



pheric pressure. 

 principe, element. 



, proceeding, method, pro- 



cess. 



profil, diagram, section, profile. 

 propulseur, propeller, propelling 



apparatus. 

 protoxyde d'azote, nitrous oxide. 



de carbone, carbonic oxide. 

 puissance, moving force, motive 



force, power. 



effective, effective power. 



utile maxima, maximum use- 

 ful power. 



pulverulent, pulverulent. 

 pylone, tower. 



Radiateur, radiator. 



raffiner, to refine. 



le cuivre, to refine, to anneal. 



rail croise", cross-rail. 



jointif, jointed rail. 



rainure, crack, interstice, groove. 



rampes (d'acces), approaches. 



rang, rack (in a composing-room). 



ranged, bed, layer. 



rayonner (en tous sens), to run, 



to branch out. 

 reactif , test, reagent. 



A substance used to effect chemical 

 change in another substance for the 

 purpose of identifying its component 

 parts or of ascertaining its percentage 

 composition. 



reaction, reaction. 



The mutual or reciprocal action of 

 chemical agents upon each other. 



re*agir, react. 



To act mutually or reciprocally upon 

 each other, as two or more chemical 

 agents. 



rechange, duplicate, spare piece. 



rechaud, warmer. 



recipient, recipient, receiver, con- 

 denser. 



recouper (les paves), to trim. 



re*duire, to reduce. 



refouler, to drive into. 



refractaire, fire-proof, refractory. 



r6frig4rant, cooling-tub, condens- 

 ing-tub. 



