i4 J^egetahle Staticks. 
tingprdbably only a progreflivc and not a 
circulating motion, as in animals. 
Since then a plentiful perfpiration is 
found fo neceflary 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 dn men is often flopped 
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 vegetables perfpiration can be flopped 
only by inclement air i unlefs by an un- 
kindly foil, or want of genial moifture it is 
deprived of proper or fufficient nourilhment. 
As Dr. Keill obferved in himfclf a con- 
fiderable latitude of degrees of healthy per- 
fpiration, from a pound and half to 3 pounds 5 
1 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 peripired, {cateris paribus) and with 
fcanty watering the perfpiration much abated.' 
Experiment II. 
Brom July to Aug. id. I wcig^iccl 
foe 
