136 
minations are to be expected that correspond to 
different part-collectives. 
Best qualified for the frequency analysis are 
the shadow-pictures, as they furnish a great num- 
ber of single individuals in each photo. Frequen- 
JOHANNES GRUNOW 
cies of individual crystals were put down in a 
table showing for each observation the share of 
each form in accordance with the International 
Snow Classification expressed in percentage (Fig. 
6). The predomination of forms that originated 
BANNER 
Ss oe a 
Se, 
1500 1600 1700 1800 1900 
Explanation (International Classification) 
aS Spatial plates (irregular crystals) 
TC _sColumns, bullets & 
© Piates, sectors, broad branches =| 
Plates with dendrites 
Spatial dendrites 
Capped columns and bullets 
HE dendrites, stellare, dencrites with plates 
Unknown Forms 
Fie. 6—Frequency analysis of observed snow crystals derived from shadow pictures; percentages of 
observed crystal types according to the International Snow Classification; Hohenpeissenberg, March 
21, 1958 
Soee 
Sip ie 
BAEC 
SS5 
NG 
NN 
SJ 
<4 
G 
a= 
aa 
\U 
7 
0. 
0700 oeo0 0300 1000 1100 1200 1300 
BANNNS 
Byy> > 
Fra. 7—Percentage of frequency of dimensions of snow crystals; crystal group: plates, sectors, broad 
branches, Hohenpeissenberg, March 21, 1958 (Operation 27) 
