344 QJ Vegetation. 



(Fig. 44-) reprcfents the fnape and ilzc 

 of a young Fig-leaf, when firlt marked 

 with red points, \ inch diftance from each 

 other. 



(Fig. 45.) reprefents the fame full grown 

 leaf, and the numbers anfwer to the corrc- 

 fponding numbers in the young leaf : 

 Whereby may be feen how the feveral points 

 of the growing leaf were leparated from 

 each other, and in what proportion, vi&. 

 from a quarter of an inch, to about three 

 quarter's of an inch diftance. 



In this Experiment we may obferve that 

 the growth and expanfion of the leaves is 

 owing to the dilatation of the veficles in 

 every part, as the growth of a young (hoot 

 was fhewn to be owing to the fame caufe 

 in the foregoing Experiment 8 5 and doubt- 

 lefs the cafe is the fame in all fruits. 



If thefe Experiments on leaves were fur- 

 ther purfucd, there might probably be many 

 curious obfervations made in relation to 

 the fnape of leaves : By obferving the dif- 

 ference of the progreffive and lateral motions 

 of thefe points in different leaves, that \yd:e 

 of very different lengths in proportion to 

 their breadths. 



That 



