( 543 ) 
veHi> arteriofa can thus comprefs thoC^ homhi y becaufe that the 
raid blood is inclofed in its veflfels, that keep and hinder it from 
cottiprefilng others. Yet I am not ignorant, that the things that are 
included in the Oefofhagus do indeed comprefs the affera arreria^ 
and thdit the afper a arteria by being filPd comprefles aifo the Oefo" 
fhagm^ upon the account of thefcituationof thefe two conduits, 
But it appears not at all,that tjie fmalleft ramifications of thofe bron- 
ffe>nd of Che vem artemfa.^veicitudite in the fame manner; for,the 
being harder than the arterialvem, they will comprefs ^> 
moreeafily, than be compreffedi;' /> 5 and fo, if you ftould blow 
them up with Bellows, they would glue the fides of that veiff toge- 
ther, and hinder the iGirculation : Which is direflly contrary to 
the Experiment ; as M. G»/W^himfelf obferveth* 
It is therefore far more probable , that, if the Lungs becom- 
preflfedjihatcomprefTionbe made by the pleura\ which may be 
Twelled mthiniht Breaft , as the skin is fvvelled mthout. But it 
isnotneceflary, that the Lungs be comprejjed in ^dcuo , to niake 
them fubfide in water- For I have divers times put pieces of Lungs 
and whole Lungs in the vacuum, and they remained there extreme- 
ly fwelled ; but as foon as the Air was again intromitted, they be- 
came very flat and red , and funk to the bottom in water* Which 
fliews , that 'tis fufficient for getting the Air out of the Lungs , to 
render them clofe and red $ and I have not been able to produce 
this efFeca but by means of the EKhaufting Engin. For, I 
have left Lungs a whole night between two plates with a great 
weight upon them , to endeavour to exprefs the Air out of them, 
but it w^ould not fucceed, and thofe Lungs did ftill float upon the 
water. I have alfo tried to make the Air re-enter into the Lungs 
after I had rendred them folid in the Engin , and that I fouud 
very eafie ; for, drawing them out from the bottom of the water, 
I did blow into the afferaarteria\ and the Lungs fvvelled again 
and refumed their ordinary colour, and floated on the water» And 
this is that which befalls the Lungs of Infants newbcirn. 
Promifcm^s 
