VOCABULARY. 



183 



re*fringence, refringency. 



The power of a substance to break 

 the natural course of a ray. 



regie du parallelogramme, paral- 

 lelogram law. 

 re*glette, rule, spacer. 



d'imprimerie, composing-rule. 

 rSgulateur, regulator. 



reins d'un arc, spandrel. 



rendement, efficiency, product. 



re'seau, net-work. 



resistance, resistance, resisting- 

 force. 



The designation resistance is also 

 applied to coils of wire which are in- 

 troduced into electric circuits on ac- 

 count of the resistance which they offer 

 to the passage of the current. 



me'canique, mechanical resist- 

 ance. 



ressort a boudin, spiral-spring, 

 re'sultante, resultant, resulting- 



force. 



reversibility, reversibility. 

 revetir, to line with. 



rheostat, rheostat, resistance-box. 



A box containing one or more resist- 

 ance-coils. 



rivure, riveting, riveted joint, rivet- 

 joint, clinched end of a rivet. 

 robinet, cock, tap. 



d'arret, stop-cock. 



- d'entree, admission-cock, in- 

 duction-cock. 



de sortie, discharge-cock, educ- 

 tion-cock. 



roder avec de Pe"meri, to rub or 



polish with emery, 

 rondelle en papier, paper-disk. 



(de zinc, etc.), disk, 

 rotissoire, oven. 



roue dente"e, toothed or cog-wheel, 

 rouge, chaleur rouge, red heat. 

 blanc, white heat. 



Red heat, white heat are states of 

 metals at high temperatures in which 

 they radiate a reddish or (when heated 

 still higher) a much whiter light. 



rougir, faire rougir, to give heat 

 to, to heat. 



Sable mouvant (boulant), quick- 

 sand. 



salin, saltish, saline, 

 sapin du Nord, Northern fir-tree, 

 saturer, to saturate. 



In chemistry, to impregnate or unite 

 with till no more can be received. 



scheidage, bucking. 



To break into small pieces for jig- 

 ging or separating the heavier ore from 



scierie, saw-mill, saw-machine, 

 sec, seche, brittle (of metals), 

 section, section, profile, 

 sel de cuisine, common salt, 

 sodium-chloride. 



sel double, double salt. 



A salt containing two different acid 

 or basic radicals. 



metallique, metallic salt. 



A salt which has a metal or metallic 

 oxide for its base. 



sellette, saddle, 

 semelle, flange (bridge). 



half -armature (electro - mag- 

 net). 



serpentin, coil, coiled pipe, 

 sesquioxide, sesquioxide. 



A compound of oxygen and another 

 element in the proportion of three 

 atoms of oxygen to two of the other. 



signal a distance, long distance 

 signal. 



