( m ) 
to that of the Air $ then when the Met* 
cury is at 28 or a little lower, the fame 
Body immerfed three Foot and an half deep 
in common Water, fuftains only a Weight 
very near equal to that of the Air, when 
the Mercury (lands at 31ft or higheft in 
the Barometer. Hence appears the Ufe- 
fulnefs of the Cold Bath in moift, wet, 
foggy, heavy, cloudy Weather, when the 
Mercury is very low, to brace the Body* 
forward Perfpiration and the animal Secre- 
tions, efpecially of nervous Juice to cheer, 
enliven, and rouze the Body. 2. From 
this - Diminution of the Preffure by the At- 
mofphere it is, that in rainy, foggy, or 
milling Weather, we find ourfelves fo dull, 
fleepy, and inactive, the Mind alfo con- 
fufed, flow, and cloudy, our moll intenfe 
Thoughts are often (hallow and inconnec- 
ted ; all which may be prefently difperfed 
by cold Bathing, for Reafons above. 
Since there is fo great a Difference of 
the Preffure of the Air at fundry Times, 
viz. 40001b. Weight, or near a iothPart, 
the Effects of it on tender Bodies mull be 
very fenfible, for when the Barometer is at 
lowed:, from this Diminution of Compref- 
fion, the Veffels on the Surface and Ex- 
treams 
