( lot^ ) 
That on the contrary the Crajfame^taf?t yields muchi 
iefs Phlegm, bat the other Principles muchi more co- 
pioufly than the Serum. 
From which Data^ I think, we may fafdy conclude,, 
that the Craffamentum, or Globular part of the Blood, 
confifts of fome Phlegm united with the Oil and 
Salts, and a fmall quantity of Earth 
But what is the exaifi proportion of thefe feveral 
Principles to one another ; what alterations are produ-- 
ced in the Body by a change of this proportion ; how, 
and in what part thefe Globules are form’d ; by what 
means they preferve their Figure, without difiblving in 
the Serum, or uniting with oiie another ; what varia- 
tions are made in their Specifick Gravities by Heat and 
Cold ; and what are the efFeds of thofe Variations, 
are Queftions not very eafy to be folv’d, and yet of 
lb much importance to the Animal Oeconomy, that 
it were greatly to be wiflit, we had a number of Dafa 
fulEcient to determine them. 
F. S. Since this F^per was lent to the Prefs, I made 
the following Experiments, which ferving to confirm^ 
the Method lad made ufe of, for finding the Specifick.. 
Gravity of the Blood Globules, it may not be impro^ 
per to relate them. 
Augufl 6 1719. I took a lump of the Craffamen^ 
ium, and walk’d it gently in fair Water, to free it 
from the loofe Globules, which precipitating out of 
the Scrum, after the Coagulum is form’d, do not unite ■ 
into one Body with it. This done, I laid it on 
fpungy brown Paper, in order to drain off the fuper- 
fluous Moifture. After which, weighing it firft: ins 
Air, and then in Water, I found its Specifick Gravity 
to be 
9^ R z 
Anothetr 
