(seq. 27)

10 Lect. 2^d

There are three Ways of obtaining the Compo-
sition of Blood, 1^st by Microscopes, 2^d. by Chemistry
3^d. by Observations upon it, when drawn from the living
Animal, & mixing it with various Sorts of Fluids - Lewenhoek
with others ^{who examined them in small Glass Tubes} agrees, that the largest Globules are red. Haller
thinks, that these Globules are only seen in cold Animals
as Fish, Frogs &c. They are said to be nearly the same, as to size
in all Animals from the largest to the smallest. D^r. Irvin
says that 340 Globules make an Inch in Length. Haller thinks
they are still smaller & the quantity different. And is more florid
& thick, or more thin & watry in different Circumstances - The red
Globules are the heaviest Part, & fall to the Bottom of the Vessel.
D^r. Haller is of Opinion that the Heart moves before there is
red Blood, he considers the Anima, as the Principle, & the Blood
the Instruments, by which all the Functions of the Body are
performed. The Antients used to make great Distinctions
between the Animus, & Anima. The Animus, they thought, was
judged, reasoned &c. but the Anima, they thought was seated in
the Blood, & was that actuating Principle, which governed the vital
Actions, about which it was wholly employed - The Shape
of these Globules are not certainly known. Lewenhoek says,
they are lenticular, oval or Oblong. & that they alter their Shapes
in Pissing thro small Vessels, tho' it is not confirmed by late
Authors. He says, that a red Globule swimming in a thinner