with the Microfcope, 1 15 
> 
tions will be taken oft. And from the fame 
Principles it is eafy to account for all its 
other Effects, and perceive how too great a 
Number of fuch fringed Globules muff caufe 
a total Stagnation of the Blood, and confe- 
quently kill. Vid. PhilofTTranf. Numb. 222. 
Spirits, Oils, diffbhed Salts, Tinctures, Ef¬ 
faces, and all other chemical Preparations, 
furnifh us with numberlefs Subjects of Ex¬ 
periment ; and are certainly capable of pro¬ 
ducing the mod: fudden and amazing Ef¬ 
fects either good or bad, if injected into the 
Blood-Veffels of living Animals: the Caufes 
of which Effects may in a great Degree be 
difcovered and accounted for, by mifcrofco- 
pical Obfervations on Mixtures of them with 
the Blood when extracted from the Veins. 
A little Blood being mixed with about ' 
four Times its Quantity of * Sal Volatile 
Oleofum, and viewed through a Microfcope , 
there appeared an immediate Separation of 
the Globules. In about the eighth Part of 
a Minute fome of them were much dimi- 
nifhed, and in a Quarter of a Minute many 
of them were much diffolved, and entirely 
difappeared. Sometimes twenty Globules 
were feen near together, which foon ieffened 
to eighteen, then to fixteen, and became 
fewer and fewer, till only two or three were 
left. Whence it is probable that Sal Fo~ 
* Arcan. Nat, Tom, IV. p, 36, 
iatile 
V 
