( So ) 
Having made feveral Injedtions of wtrm Wafer into the 
crural Artery of a Lamb of a Year old, all the flefhy-Fibres 
loft all their rednefs, and became entirely white. The Fibres 
being whitened by this Injetftion, he inje&ed a coloured 
Liquor by the fame Artery ; and then not only the fmall Ar- 
teries appeared filled with this tinged Liquor, but he found 
alfo that the Liquor paft thro’ each Fibre, either in a Serpen- 
tine manner, or undulating, or frameing feveral Angles, or 
joined by a great number of Anaflomofes. 
He obferved alio, that many fmall Branches of the Arteries 
which before could not be feen, appeared vifibly, fipread all 
round the little Fibrilla, and tinged with the lame Colour. 
Having remarked, that the Parts of the flefhy Fibres, which 
were near the Extremities of the Arteries, appeared tinged 
with the Liquor, he examined them with a Microfcope, and 
found the little Fibrilla filled and tinged with the fame Li- 
quor ; and yet there was not lead appearance of the Liquor in 
the Interfiled between the Fibrilla. 
Having made Injedtions by the crural Artery, of another co- 
loured Liquor, in theMulcles, whiten’d, as before, with Water, 
he law not only the Fibres in fome of the Mufcles, and the 
mod part of them in the others filled with this matter ; but ha- 
ving examined them with a good Microfcope, he found the 
Fibrilla , and even the leaft Tubuli which compofe them, filled 
and tinged with the fame Matter; and neverthelcfs the fmall 
Ramifications of the Nerves appeared perfectly white. 
It relults from all thefe Obfervations, 
i ft. That the little Tubes, which make a Fibrilla, are really 
hollow, and that the Extremities of the Capillary Arteries open 
into them, and empty there a part of their Liquor, which is 
re-conveyed by the Veins to the Heart. 
2d. Thar the Blood Globules muft be divided into analmoft 
infinite degree of fmalnefs, before they can enter and pafs 
thefe Tubuli. That the Blood-Globules may be fo divided, 
and when fo divided pafs thro’ the fmall Tubuli, is evident 
from 
