14 Vegetable Static ks. 



ving probably only a progreflive and not a 



circulating motion, as in animals. 



Since then a plentiful perfpiration is 

 found fo neceffary for the health of a plant 

 or tree, 'tis probable that many of their dif- 

 tempers are owing to a ftoppage of this 

 perfpiration, by inclement air. 



The perfpiration in men is often (topped 

 to a fatal degree ; not only by the incle- 

 mency of the air, but by intemperance, and 

 violent heats and colds. But the more tem- 

 perate vegetable's perfpiration can be flopped 

 only by inclement air $ unlefs by an un- 

 kindly foil, or want of genial moifture it is 

 deprived of proper or fufficient nourifhment. 



As Dr. Ketll obferved in himfelf a con- 

 flderable latitude of degrees of healthy pern 

 fpiration, from a pound and half to 3 pounds 5 

 I have alfo obferved, a healthy latitude of 

 perfpiration in this Sun-flower, from fixteen 

 to twenty eight ounces in twelve hours day. 

 The more it was watered, the more plenti- 

 fully it perfpired, {ceteris paribus) and with, 

 fcanty watering the perfpiration much abated. 



Experiment II. 



Irom July $d. to Aug, id, I weighed 



for 



