Of Vegetation. 349 



Hate of things the work of Vegetation feemed 

 to be wholly at a ftand, at lead within the 

 reach of the froft. 



But when the cold was fo far relaxed, as 

 to have the fpirit in the firft Thermometer 

 but five degrees above the freezing point, the 

 fecond 8 degrees, and the fixth 13 degrees, 

 tho' it was ftill very cold, yet this being fome 

 advance from freezing towards warm, and 

 there being confequently fome expanfion of 

 the fap, feveral of the hardy Vegetables grew, 

 viz. fome Ever-greens, Snow-drops, Crocus's, 

 &c. which forward hardy plants do proba- 

 bly partake much of the nature of Ever- 

 greens in perfpiring little ; and the motion 

 of their fap being confequently very flow, it 

 will become more vifcous, as in Ever-greefts, 

 and thereby the better able to refift the win- 

 ter's cold ; and the fmall expanfive force 

 which this fap acquires in the winter, is 

 moftly exerted in extending the plant, little 

 of it being wafted in proportion to the fum- 

 mer's perfpiration. 



Supported by the evidence of many of the 

 foregoing Experiments, I will now trace the 

 Vegetation of a Tree from its firft feminal 

 plant in the Seed to its full maturity and pro- 

 duction of other Seeds, without entring into 



a par- 



