of by rail? He supplies the equivalent in coalof this amount of motive power. Assuming that eachhorse-power can be generated by the consumption of 3 lb.of coal per hour, and that the engines work six days and ahalf per week, we should require an annual consumption ofcoal equal to 1,012,600 tons to… … Figs. 4 and S.-BOSES LIFE BUOYS. FIG 6 PsBPAKATiON OF AiTjMiNTiM.—Alu-minum sulphide is obtained from pow-dered cryolite; and it is then decom-posed by heating to redness with ironturnings. The cryolite is first dissolvedin water, which dissolves out the sodiumfluoride. The residue, aluminum…
