concerning Animal Impregnation. 1 65 
EXPERIMENT. 
I inspected the ovaries of another rabbit forty-eight hours 
post coitum. At this period the vesicles seemed to be in the 
very act of bursting, and a semitransparent substance, of a 
mucus-like consistence, was beginning to protrude from some 
of them ; others indeed were less advanced. The fimbriated 
extremities of the fallopian tubes were preparing to receive 
their contents, as appeared by having quitted their usual po- 
sition, and embraced the ovaries in such a degree, that only 
a small portion could be seen until the tubes .were taken 
away. Sections being made into the thickened vesicles, the 
formation of corpora lutea appeared to have made further 
advances. 
From the appearance of an incipient rupture of the vesicles 
in this experiment, it was but reasonable to expect that their 
contents would soon have escaped ; but as my views were di- 
rected to the formation of a corpus luteum, I deferred the next 
examination to a more distant time. 
EXPERIMENT. 
In two days and twelve hours after coition, I examined the 
ovaries of another rabbit. The foetal rudiments had escaped ; 
but the cavity of the ovarian vesicles had sufFered but little di- 
minution. Bristles were easily introduced by the ruptured ori- 
fices. In this experiment the advances towards the formation 
of a perfect corpus luteum were such as the period of examina- 
tion would naturally lead us to expect. 
The contents of the vesicles having escaped, it was but rea- 
sonable now to look forward to a speedy obliteration of the 
