VOCABULARY. 



(se) grenailler, to be granulated. 

 grenailles, granulated metal. 

 gres, sandstone, grit, 

 grillage, roasting, calcining, burn- 

 ing. 



grisou, fire-damp. 

 grue, crane, 

 gyroscopique, gyroscopic. 



Illustrating or pertaining to the dy- 

 namical laws of rotation. 



Hauteur de la chute d'eau, height, 

 head of water. 



hectare, hectare (2.471 acres). 



hellce, helix, screw-line, helical 

 curve. 



contourner en helice, to coil in 

 a spiral form. 



he*te*rogene, heterogeneous. 



homogene, solid, uniform, homo- 

 geneous. 



horloge-type, clockwork-type, reg- 

 ulating clock. 



houille, pit coal, black coal. 



hydratation, hydratation. 



Same as hydration. The process of 

 combining or impregnating with water. 



(s')hydrater, to combine or im- 

 pregnate with water, to form 

 into a hydrate, to become hy- 

 drated. 



hydraulique, hydraulics, mechan- 

 ics of fluids. 



adj. hydraulic. 



Pertaining or relating to fluids in 

 motion, or to hydraulics. 



hydrocarbonate de potasse, potas- 

 sium hydrocarbonate. 



hydrocarbure, carburetted hydro- 

 gen, hydrocarbon, carbo-hydro- 

 gen. 



hydrocarburer, to hydrocarbonize, 

 to be charged with hydrocar- 

 bon. 



hydrogene carbon6, marsh gas. 



bicarbone*, olefiant gas. 

 hydroxide de mercure, hydroxide 



of mercury. 

 hygrometre, hygrometer. 



a absorption, hygrometer of 

 absorption. 



& condensation, condensing hy- 

 grometer. 



hygrome'trie, hygrometry. 



The determination of the humidity 

 of bodies, embracing also the theory 

 and use of such instruments as have 

 been invented for this purpose. 



hygrome*trique, hygrometrical. 



Pertaining to hygrometry or the state 

 of the atmosphere as to moisture. 



Imbiber d'huile, to saturate with 



oil. 

 imbriquer, to imbricate. 



Lying one over another or lapping, 

 like tiles on a roof. 



immeuble, house. 



impermeable, impervious, (air-, 

 water-) proof, (air-, water-) tight. 



impulsion, impulsion, impetus. 



incandescence, white-heat, incan- 

 descence. 



incandescent, incandescent. 



