Elementary treatise on physics, experimental and applied, for the use of colleges and schools (1898)
Ganot, A. (Adolphe), 1804-1887 · London, Longmans, Green · leaf 445
...... 17 Alcohol „ 15 Solution of alum or sugar y,' 12 Distilled water „ . 1 1 In experimenting with solids they were cut into plates o-i inch in thick¬ ness, and it was found that of every 100 rays there was transmitted by Rock salt . . . .92 Selenite . . .20 Smoky quartz . . .6 7 Alum . . . .12… … Fig. 4x4 of brass with an aperture on the top through which the liquid could be poured. As this ring could be changed at will, liquid layers of various thicknesses were easily obtainable, the apparatus being merely screwed together and made liquid-tight by paper washers. The instrument was mounted…
Physics
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