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THE LILIES OF THE FIELDS, ETC. 303 
The snow-crystals in the annexed figure (Fig. 56) are 
more common. Many of these forms may be observed on 
any calm winter day, Fig. 56, 
When the snow falls 
slowly in a cold 
atmosphere. The 
lower pennate form 
—also taken from 
the plates of Franke 
—is particularly in- 
teresting, for it 
shows the six-sided 
star as made up of 
two triangular 
halves, the one cor- 
responding to the 
corolla, the other to 
the calyx (outer star) of the lilies. In this same group of 
snow-erystals we have also three more compact forms, show 
ing not merely the hexagonal star, principally represented 
by its six rays, Fig. 57. 
but having the 
Whole ground 

more eomplete- 
ly filled up so as 
to form a reg- 
ular six-sided 
plate. Between 
these and the 
“lilies of the 
rocks," the erys- 
tals found in 

Caves and crey- :4l difference. Com- 
ices deep in the earth, there is no essential di erer la ]y the 
pare the figure of the Emerald (Fig. ST), peruen aii from 
lower figure representing a R ussian emerald, as seel 
