(515^ ) . - 
A New Expermeni of ike Noble ^.Boyle^ coneermngun Bfe& 
of theVarjing Weight of the At mojp here upon fome Bodies 
in the Watev^ the Defcription vohereof was prefentedA,i6ji, 
to the perufalof the Right Honourable the Lord Brduocker* 
ois the Experimmt it felf tpasjtnce by the Authors favour 
. ftjetvn to the Publiffjer. 
Hough many thiogs have by logeoious men beenal- 
_ ready obferved , as to the Power and OperatioDs of 
the AtfBofphere s Weight upon Liquors that are expofcd 
to it 10 Torricellian Tubes ( or other Veflels clofed at one 
cndj and near the top either empty or uofiU'd with any vi- 
lible BodyO yet men feem not to have much inquired what 
effefl-s the very Variation of this weight of the Atmof- 
phcre may have on the Liquors which it prefles , ia other 
Veflels than fuch as Barofcopes and Pumps. And yet when 
I remember, how much of Air appears by our Engioc to be 
invifibly harbour'd in the Pores not only of Water, but of 
■ the Blood, Serum, UrinejGall, and other Juyces of the Hu- 
imane Body, and that ( as I have elfewhere experimentally 
fhewn) ihePrefTureof the Atmofphere and the Spring of 
the Air work upon Liquors and on Bodies immers'd in 
thofe Liquors, as well as upon Solid ones immediately ex- 
pofcd to the Airj I am prone to fufpcft^that the very Alte- 
rations of the Atmofphere in point of Weight may, io fome 
cafes, have fome not contemptible OperVjions even upon 
mensSicliGefsorHe^ as when the ambifcnt Air, for In- 
ftaoce^ grows fuddeoly very much ligliter than 'twas be- 
fore, or than 'twas wonttobej the fpirituous and aerial 
particles, that are plentifully harbour'd ia the mafs of 
Blood, will naturally fwell that Liquor, and fo may diftend 
the greater Veflels, 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 
thole that know in general, how important a thing the 
manner of the Circulation of the Blood ipay be there, 
though 
