Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 276
irwhich envelope them. If the dew-point is below the freezing-point the moisture is deposited as frost. 300. Rain, Snow and Hail. The cloud globules gravitateslowly towards the earth. If they meet with conditionsfavourable to vaporization they change to vapour again, butif with conditions… … in snow-flakes. At low temperatures, also, vapour becomestransformed into ice pellets and descends as hail. The hail-stones usually contain a core of closely packed snow crystals,but the exact conditions under which they are formed are notyet fully understood. 301. Distillation. Distillation is a…
Physics
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