Ib6 Some Account of the "Blood. 
this had computed that * twenty-five thou-® 
fand of them were but equal to a Grain of 
Sand. 
Suppofing, then, the Blood in People of 
found Health to confift of Globules of fuch 
Size and Competition as before mentioned, 
foft, flexible, and eafily feparable ; it muft 
neceftarily happen, that a confiderable Alte¬ 
ration in any of thefe Particulars will occa- 
fion a morbid State,—Should the Globules, 
for Inftance, be divided too minutely, and not 
readily again cohere ; fhould they become 
rigid and unflexible, either when feparated or 
united j or lhould they coagulate and become 
infeparable, bad Confequences muft enfue. 
The great Boerhaave fays, that Health 
confifts in an equal Motion of the Fluids, 
and an equal Refiftance of the Solids. Now 
the Fluids move equally when their Force 
is not greater in one Part than in another ; 
and the Refiftance of the Solids is equal 
when they comprefs the Fluids every where 
fo equally, that no Senfe of Pain arifes. 
But when the Globules of the Blood co¬ 
here in Mafifes too large, and will not eafily 
be fo feparated as to pafs freely through the 
* If the Diameter of one thoufand nine hundred and forty 
Blood-Globules be equal to the Length of one Inch ; and if, 
as Geometricians demonftrate. Spheres be to each other as the 
Cubes of their Diameters, ir mull neceftarily follow, that a 
Sphere whofe Axis is one Inch in Length muft be equal to 
feven thoufand three hundred and one millions, three hundred 
and eighty-four thoufand luch Globules, 
minuteft 
