Hdemafiatks. 79 
was in this Dog thus retarded, it miifl: needs 
therefore flow in much left Quantity to the 
left Ventricle of the Heart, which being thus 
deprived of a fufficient Supply, the Force of 
the whole arterial and venal Blood of his Bo- 
dy muft be proportionably rebated, and con- 
fequently a lefs Supply coming from the Veins, 
to the right Ventricle of his Heart, the Force 
of the Blood in the pulmonary Artery, being 
much abated, fo as not to be fufficient to di- 
late the Lungs, they collapfe : So that if a 
Tube had at the fame time been fixed to one 
of the carotid Arteries of this Dog, no doubt 
but the Blood would have fubfided confiderably 
in the Tube. 
y. But when on ftraining, the Dog, by the 
joint Aftion of all the Mufcles of his Abdo-- 
meUy thereby comprefled the venal Blood for- 
cibly up into the afeending Vena Cava^ the 
right Ventricle of the Heart being thereby more 
plentifully fupplied with Blood, impelled it 
alfo more forcibly into the pulmonary Arte- 
ry, fo as to make the collapfed right Lobe 
of the Lungs inftancly to dilate, fo vigoroufly 
to pufli the lower part of the Lobe, one, two^ 
and fometimes three Inches length out thro’ 
the Incifion 5 and that after he had loft half a 
Pint 
