MacDonald, Alexander Forsyth, 1897-1965 · Port Credit, Ont. : Aviation Service Corporation · leaf 53
ch causes it to freeze in the form ofsoft ice. Falling through the supercooled region, moresoft ice is deposited on it, increasing its size. The ballof soft ice so formed then falls through the water region.Water freezes on it in the form of hard, transparent ice.Finally the ball falls out of the… … fig. H. Regions of a Cloud. peated, perhaps several times. In this way, very largehailstones are formed. The vertical gusts which produce very large hail-stones may have velocities in excess of 100 mph. The conditions which produce hail are very similarto those in which thunderstorms originate.…
Airplanes
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