concerning Animal Impregnation. 177 
it is possible to impregnate an animal in the situation just de- 
scribed. 
EXPERIMENT. 
Two other rabbits full grown and perfectly healthy were 
made the subject of a repetition of the last experiment. The 
male was offered to them several times during the space of three 
months. They generally refused him, yet received him twice 
or three times each during this interval; but neither were 
impregnated. As the signs of degeneracy from their proper 
sexual character became daily more evident, they were devoted 
to anatomical inspection, and exhibited appearances in the 
ovaries like the former, but somewhat less in degree. 
The rabbit keeper informing me that those which had al- 
ready had a litter were more certain of breeding than those 
which had not ; I determined to make a trial of one of this 
description, with a view to compensate for my former disap- 
pointment.. 
EXPERIMENT. 
Being furnished with one of this kind, and from which the. 
young had been taken away three weeks at the age of ten 
weeks, which, together with the month of gestation, amounted 
in the whole to four months from the last conception, I made 
this the subject of the experiment. Now, at this distance of 
time, it is not very probable that the ovaries should retain very 
evident vestiges of the preceding conception : but as it was a. 
point of too much importance to be left in doubt, I determined 
to satisfy myself by ocular examination, which, by a little 
management, was effected. The traces of corpora lutea were 
mdccxcvii. A a 
