( 333 ) 
Degree of Coldnefs ; hence the coldeft Wa- 
ter is found the moil efficacious in a great 
many ftubborn Cafes. 2. The Suddennefs 
of the Application of the Cold to the Body $ 
hence jumping in all at once, gives a greater 
Contradion, than going in leifurely, or by 
piece-meal. By this fudden Immerfion, 
the Contraction is inftantly propagated 
through the whole Syftem, whereby the 
Humours are propelled with greater Force 
through the VefTels, the Fibres and Veffels 
being at the fame Time more tenfe and 
firong, will ad with greater Force, driving 
forward their Contents with a quicker Mo- 
tion, and break them more powerfully and 
irrefiflibly. 6. When the Mercury ftands 
highefl in the Barometer, our Body (fup~ 
poling its Area to be fifteen Feet) fuftains 
a PrefTure of the Air equal to 39900 lb. 
Weight, and when the Mercury falls loweft, 
the Weight of Air on the Body's Surface, 
exceeds not 360001b. Weight, then the 
Odds is near 40001b, enough to make a 
very great Difference and fenfible Alteration^ 
in the Circulation of the animal Juices on 
the Body's Surface. 7. Since a Body im~ 
merfed two Foot deep in common Water, 
fuftains a Weight equal to 2280 lb. added 
to 
