THE MECHANISM OF HAIL FORMATION 
309 
Fic. 3—Top of a graupel indicating residuals of a snow crystal (star); real length 
of the figure, 0.43 em 
serving the hailstones by any form of refrigera- 
tion, since this would lead to a change in strue- 
ture. 
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Discussion 
(Note: Discussion of this paper is combined with those of the two following papers at the end of 
the second following paper.) 
