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. j8. Corpuscle fcom 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, h. 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 1 J 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 



MDCCCXLI. 2 F 



