DR. MARTIN BARRY ON THE CORPUSCLES OF THE BLOOD. 211 
Fig. 24. Ox ( Bos Taurus, Linn.) ; embryo of fths of an inch in length. Corpuscles 
of blood taken from the back part of the head. a. The nucleus consists 
in two instances of two, in another instance of three discs, which are in 
close approximation. (3. The discs have separated, much increased in 
size, and assumed a cell-like appearance, y. The corpuscle exhibits an 
orifice. 
Fig. 25. Blood-corpuscles from the same embryo, after remaining twenty-four 
hours between two plates of glass. They had begun to collapse ; a 
change which seems to commence by a falling in of that part of the 
membrane where the nucleus lies, and where an orifice in the mem- 
brane is in some states to be discerned. 
Fig. 26. Blood-corpuscle from the liver of the same embryo. The nucleus seemed 
to consist of two portions. 
Fig. 27- Blood-corpuscles from the liver of the same embryo, after the addition of 
acetic acid. The latter has made them globular. In all, the nucleus 
consists of two discs. In the lower one, large discs or incipient cells 
are represented surrounding the nucleus. 
Fig. 28. Ox ( Bos Taurus, Linn.) ; embryo of about one inch in length. Outline 
of corpuscles in blood taken from the back part of the head. These 
were not very flat, especially the smaller ones, which were much more 
numerous than the large, a, a. The corpuscle presents an orifice. (3. A 
nucleus is visible, consisting of two closely adherent discs. 
Fig. 29. Blood-corpuscles, chiefly in outline, from the same part of the same em- 
bryo, after the addition of acetic acid ; which has rendered most of 
them spherical in form. After some time, they became shrivelled in 
appearance, a. Ruptured corpuscle. (3. Corpuscle from which a glo- 
bular object (presenting on one side the membrane of a minute cell ?) 
is escaping, y. Object nearly resembling a mature blood-corpuscle, 
surrounded at a little distance by a membrane. A similar object on 
its edge, but without a surrounding membrane. It presents an orifice 
on one of its broad surfaces. 
Fig. 30. Ox (Bos Taurus, Linn.) ; embryo of If inch in length. Outline of blood- 
corpuscles from the liver, after the addition of acetic acid. a. Cor- 
puscle containing two globules, composed of discs. (3. Corpuscle dis- 
charging a globule of the same kind ; the membrane of a minute cell 
rising from this globule, y. A similar compound globule, probably re- 
cently discharged from a corpuscle, and now eccentric in a minuter 
cell. 
Fig. 31. Ox (Bos Taurus, Linn.) ; embryo of if inch in length. Outline of cor- 
puscles in blood from the back part of the head, after the addition of a 
very minute quantity of acetic acid. In the larger ones, the nucleus 
2 F 
MDCCCXLI. 
