100 



TALKS AFIELD. 



tion of the line about the stem, and the nu- 

 merator records the fact that the line passed 

 but once about the stem in finding a leaf 

 situated directly over the first. 



Fig. 76 represents an alder twig. Here 

 the fourth leaf is 

 over the first. Now 

 passing our line 

 around the stem we 

 find that it encoun- 

 ters three leaves, be- 

 y o n d the first, in 

 making one turn. 

 The angular diver- 

 gence between the 

 leaves is ^, and the 

 denominator records 

 the number of leaves 

 and the numerator 

 the one revolution. 



An apple twig. 

 Fig. 77, represents a 

 more complicated ar- 

 rangement. In this 

 case the sixth leaf is 

 Our line now encounters 

 five leaves, but it passes twice around the 

 stem before it reaches a leaf situated di- 



Fig. 77. 



over the first. 



