DR. MARTIN BARRY ON THE CORPUSCLES OF THE BLOOD. 
253 
like a nucleus was visible at S. The smaller object is a blood-corpuscle 
of nearly the size usually met with. It also is, for the most part, in 
outline. It appeared to be an early state of such an object as the 
larger one. &. Situation of the nucleus. 
PLATE XXII. 
Fig. 104. Ox (Bos Taurus, Linn.) ; foetus of 5^ inches. Nuclei of blood-corpuscles 
furnished with cilia, and changing their place. Colour blood-red. 
Two of them in outline, a. Observed in substance cut with scissors 
from the crystalline lens, while the lens was still imbedded in the 
vitreous humour ; so that a portion of each may have been placed in 
the microscope. Two days had elapsed since the foetus was taken 
from the body of its mother. (3. Seen along with a portion of the 
retina and black pigment, from the other eye. The discs of this cor- 
puscle appeared to shoot forth a process — the cilium — which then 
disappeared, as if drawn in. This corpuscle, as well as those at a, 
crawled about like an insect ; but very slowly. 
Fig. 105. Rabbit ( Lepus Cuniculus , Linn.) ; killed tM T o hours, post coitum. Blood- 
corpuscles and nuclei of blood-corpuscles observed in fluid taken 
from vessels in the immediate neighbourhood of a Graafian vesicle, 
which, from its size and vascularity, had evidently been destined to 
expel an ovum. a. A group of young blood-corpuscles. (3. Outline of 
the nucleus of a corpuscle, one of the projections (altered discs) in 
which, appeared to be in motion, y, y, y, y. Four ciliated corpuscles, 
- — or rather, ciliated nuclei of corpuscles, — of the blood. The cilia 
seem to be the filamentous extremities of discoid objects, into which 
the nucleus of the blood-corpuscle becomes divided. Objects such as 
those at y, were seen very gradually to change their place ; and others, 
of similar forms, were noticed to revolve ; both of these effects seeming 
referable to their cilia. Examined eighteen hours after death. Among 
the corpuscles in this figure (and therefore apparently from the interior 
of a blood-vessel), were many objects of immeasurable minuteness, ex- 
hibiting molecular motions. These minuter objects had precisely the 
red colour of corpuscles of the blood, in which they probably had their 
origin (see par. 167-). Outline of the nucleus of a blood-corpuscle, 
composed of discs not terminating in cilia, like those of y. 
Fig. 106. Common Fowl ( Phasianus Gallus, Linn.) ; chick in ovo. Young blood- 
corpuscles observed in the immediate neighbourhood of the object 
fig. 116^. One of these is in outline. They were blood-red. These 
young blood-corpuscles, with others of the same kind, were in constant 
2 l 2 
