yo Hcemajlatks. 
as the Velocity of the Blood in the Lungs, is 
found to be much greater chan elfe where, 
fo doubdefs it there acquires its greareft Heat; 
yet in other Parcs it acquires .fome, more or 
lefs in proportion to its different Degrees of 
Velocity and Fridion. 
14. I obferved above Numb, 8. that tho’ 
on fome Veficles of the Lungs, each extream 
capillary Artery had a correfponding capilla- 
ry VeiOj into which the Blood paffes ; yet I 
found that many of the extream capillary Ar- 
teries of other Veficles, emptied themfelves at 
right Angles, thro’ the Sides of much larger 
Veins ; the fame I alfo found by Injedions in 
Exper, XXL Numb. 8. Whence, we may 
conclude, chat though Anatomifts have juftly 
obferv’d, that the Number of Veins in feve- 
ral Parts of the Body, are near double to the 
Number of Arteries, yet this cannot hold 
true, when we compare the Numbers of the 
extream capillary Arteries and Veins ; for 
thofc of the Arteries muff needs for the above- 
mentioned Reafons, far exceed chofe of the 
Veins in Number. 
15. I fliall hence take occafion to attempt 
an Effimate, tho’ a very inaccurate one, of 
the Number of extream capillary Arteries in 
a 
