/ 
[ i<=4 ] 
CHAP. VII. 
Some Account of the Blood, as examined hy 
the Microscope. 
TJXJMA N Blood, and the Blood of Land - 
Animals , is found by the Microfcope 
to con fid: of round red Globules floating in 
a tranfparent Water and Serum . Each red 
Globule is made up of fix fmaller and more 
tranfparent opes : and Mr. Leeuwenhoek 
has difcovere'd, that each of thefe again is 
compofed of fix Globules dill more minute 
and colourlefs : fo that every common red 
Globule is compounded of at lead thirty- 
fix fmaller ones - y and perhaps the Divifion 
may dill go on much farther *. 
The fpecific Gravity of thefe Globules is 
fomewhat more than of the Serum wherein 
they float, as is fhewn by their fubfiding in 
Blood extracted from the Veins and at red : 
they have alfo a confiderable Attraction to 
each other, and when brought in ContaCt, 
cohere fo drongly (unlefs foon feparated 
again by Motion) as to form a Subdance re- 
fembling foft Flefh. 
It is not difficult to imagine, how fix foft 
and flexible Globules, eafily compreffible 
into any Shape, may compofe one larger 
Globule : but to make it the better under- 
* Fid, Leeuwen. Arc. Nat. Tom. IV. pag. 12. 
flood. 
