SHAPES OF MOLECULES. 



185 



the leaves of plants crystallizes it into ice, and 



bursts them like bottles 

 containing freezing 

 water; as occurs in 

 autumn through the 

 waning vibrations of 

 sunshihe, when the ter- 

 restrial currents pre- 

 dominate. The leaves 

 of evergreens escape 

 destruction and retain 

 perennial verdure be- 

 cause the vesicles are 

 rilled with unpolarized 

 oils. 



In the preceding figure, ordinary flat-headed 

 iron tack nails are represented. If the heads are 

 made of a sloping shape, they are held to the sur- 

 face in diagonal directions, as if fitted together 

 by mitre-joints to form hexagonal, octagonal, and 

 other symmetrical shapes. 



63. 



