136 



Anatomy of the Vine. 



20 ft. hi«h. 



16ft. high. 



12ft. high. 



a, then, is the supposed divi 

 sion, during its growth in the shoot' 

 from a to c, the first 4 ft. : it is 

 divided at b into two parts ; con- 

 sequently, at c, it has only half its 

 original vessels of a. 



At d it is again divided; so 

 that, at <?, it has only one fourth of 

 its original part of a, and the 

 shoot is extended 8 ft. long. 



At/* it is further divided ; and, 

 at g, it can only have one eighth 

 of the original parts of a, and the 

 shoot is extended 12 ft. long. 



At h it is also divided ; and, at 

 2, it can only have one sixteenth 

 of the original parts of a, and the 

 shoot is extended 1 6 ft. long. 



At k the last division takes 

 place ; and, at I, it can only have 

 one thirty-second of the original 

 parts of a, and the shoot is ex- 

 tended 20 ft. long. 

 S i Yet this small portion of the 



thirty-second part of a is sufficient 

 to form an entire division, equal 

 in size to the original from which 

 it first proceeded. 



Now 

 to be tolerably correct, this thirty 

 second part must be connected 

 with the vessels of the five leaves 

 below, at m n o p a ; and, in ad- 

 4 ft. high. dition, this upper leaf marked z 

 has five other such subdivisions, 

 to which it is, in like manner, 

 united. Therefore, to find the 

 number of leaves laterally con- 

 nected with this upper leaf, we 

 must multiply these five leaves 

 below mn op q by the 6 divisions 

 of the leaf z, which will give 30; 

 so that the upper leaf will be actually united with 30 leaves 

 by this beautiful and paradoxical operation of Nature. 



I have many times reckoned the divisions of the collets of 

 a long summer shoot, and I have found, invariably, a differ- 



8 ft. high. 



admitting such calculation 



