l 4 Vegetable Statuks. 



Since then a plentiful perforation is 

 found fo neceffary for the health of a plant 

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

 tempers are owing to a ftoppage of this per- 

 fpiration, by inclement air. 



The perfpiration in men is often flopped 

 to a fatal degree ; not only by the inclemen- 

 cy of the air, but by intemperance, and vio-* 

 lent heats and colds. But the more tempe- 

 rate vegetables perfpiration can be flopped 

 only by inclement air ; unlefs by an un- 

 kindly foil, or want of genial moifture, it is 

 depriv'd of proper or fufficient nourifhment. 



As Dr. Keill obferv'd in himfelf a con- 

 fiderable latitude of degrees of healthy per- 

 fpiration, from a pound and a half to 3 pounds ; 

 I have alfo obferved a healthy latitude of 

 perfpiration in this Sun-flower, from 16 to 

 28 ounces, in twelve hours day. The more 

 it was watered, the more plentifully it per- 

 fpired, (ceteris paribus ) and with fcanty 

 watering the perfpiration much abated. 



Experiment II. 



From Juty$i- to Aug. 3 d . I weighed 

 for nine feveral mornings and evenings a 



middle- 



