Hcemajiatks. 75 
the Cut-throat of a Calf, a Qtiart and a quar- 
ter of a Pint of Blood, which was kept in 
a diluted Scare by the nitrated Water. Hav- 
ing then fixed a Tube which was two Feet 
long to the pulmonary Artery of the above- 
mentioned Calfs Lungs, I poured gradually 
into the Tube, of the nitrated Blood, as much 
as the Artery and its Ramifications would 
contain, which was near a Quart, none pafs- 
ing that I could perceive into the pulmonary 
Vein. The Lungs w’ere much dilated and 
looked very red : But notwithftanding the 
perpendicular Height of the Blood in the 
Tube was two Feet, yet no Blood palFed thro* 
the Tunicles of the Veficles, into the Vciicles 
and Bronchia \ for when the Windpipe was 
held downwards, nothing flowed out but a 
white Froth ; a plain Proof that when the 
Water was lefs than a Foot perpendicular in 
Height, in the foregoing Experiments, it did 
not forcibly break thro’ the Blood-veflTels, but 
mufl: pals thro* Pores which were too fine, for 
the Globules of nitrated Blood to pafs : Thofe 
Pores being perhaps fomething larger in the 
Lungs of a dead Animal, than when alive ; for 
upon Death all the Fibres of the Body are re- 
laxed. When I cut a Slafli into the Subftance 
of 
