The Wonderland of Ice Crystals 



Snowflakes and fragmentary crystals of nat- 

 ural size. The size depends upon the tem- 

 perature, the largest being formed when the 

 thermometer stands just below the freezing. 

 The star- shaped crystals are the largest 



At right: This deposit forms on window- 

 panes in comparatively dry air and in both 

 warm and cool rooms. Alt ough beautiful 

 it is not so striking as the "window ice" 

 which forms indoors in a thin film of water 



In the magnified stellar snow crystals below 

 it will be noticed that the branches of the 

 principal rays are parallel to the rays adja- 

 cent. The crystals are more or less imper- 

 fect but the types are nevertheless distinct 



