VITAL GROWTH AND CRYSTALLIZATION 



35 



Fig. 20. Spiral Organization Found in Paraffin Crystals 



Spiral organization, which is commonly found in plant and animal life, 

 very rarely occurs in non-living crystals. In rare cases the surface of a 

 quartz crystal will show a kind of spiral when it is properly etched. Pro- 

 fessor C. M. Heck of the North Carolina State College has recently dis- 

 covered spirals in abundance and of exceptional beauty in the ordinary 

 paraffin wax when it crystallizes from mineral oil. (Magnified 1200 times.) 

 (Courtesy of Science Service.) 



