216 CLOUD PHYSICS 
Tw 
I 
' 2 10 
2.5 ae 
GROWTH CURVE = 
20 2.0 = n 
15 5 5 e 
Po = 
© 10 [Lo tw 
& = a 
= 
to} 056 Ww 
fe 
WwW 
a 
= 0) fe) 
is (0) 10 20 30 40 50 60 70 80 90 
a3 MINUTES 
a b d f g pee 
0 abc e ae : ee 
ts 10 iO 00 1 - 1 | ri Fic. 23—Condition of formation of the crystal in Fig. 24. 
-15 —~— os ‘ x. oe 
-20 BROAD SECTOR SECTOR 
BRANCHES STARTS COMPLETED 
Fie. 21.—Condition of formation of the crystal in Fig. 22. 
el 
E 1 6 cg (a) 
Ha)(b) eS 4 CH oe 
le) 8 
Fic. 22.—Course of formation of a stellar crystal with plates Fic. 24—Successive stages in the formation of a capped column 
(X14). (X37). 
