( 515^ ) 
A Vew Expersment of the Noble R.Boyle, tonctrning an Eff^e^ 
of theVaryingWetght of the Atmofphere upon fime Bodies 
in the fFater'^ the Defer iption x^hereof was prefented A.i6yi. 
to the pernfalof the Right Bononrabie the Lord Bnouncker^ 
m the Experiment it felf xpos fwce by the Authors favour 
Jbewn to the PuhUfher. 
T Hough raaoy things have by logeoious men been al- 
ready obferved , as to the Power and Operations of 
the Atmofphere*s Weight upon Liquors that arc expofcd 
to it in Torricellian Tubes ( or other Veflcls doled at one 
cndj and near the top cither empty or unfiU'd with any vi- 
fiblc Body,) yet mea feem not to have much inquired what 
cffeds the very Variation of this weight of the Atmof- 
phcre may have on the Liquors which it preflcs , in other 
Veflcls than fuch as Barofcopes and Pumps. And yet when 
1 remember^ how much of Air appears by out Engine to be 
invifibly harbourd in the Pores not only of Water, but of 
the Blood, Serum, Uria:iC3 Gall, aud other Juyccs of the Hu- 
mane Body, and that { as I have elfewherc experimentally 
Ihcwn) the Preffurc of the Atmofpbcrc and the Spring of 
the Air work upon Liquors and on Bodies immcrs'd in 
thofc Liquors, as well as upon Solid ones immediately cx- 
poftd to the Air, I am prone to fufpcft^that the very Alte- 
rations of the Atmofphere in point of Weiglit may, in fome 
eafes, have fome not contemptible Operatidns even upon 
mens Sicknefi or Health 5 as when the ambient Air, for In- 
ftanccj grows fiiddenly very much lighter than 'twas be- 
fore, et than 'twas wont to be , thefpirituous^rid aerial 
particles, that are plentifully harbour'd in the mafs of 
Blood, will naturally fwell that Liquor, and fo may diftend 
the greater Vcflels , and not a little alter the celerity and 
manner of the Circulation of the Blood by the Capillary 
Arteries and Veins. By which alteration that divers Chan- 
ges may happen in the Body , will not fecm improbable to 
rhofe that know in general, how important a thing the 
manner of the Circulation of the Blood may be there, 
though 
