132 PHILOSOPHICAL TRANSACTIONS. [ANNO 17Q7. 



none, nor the least appearance of orifice. The corpora lutea keep increasing as the 

 foetus increases, are of a sand-red colour, and very vascular. 



Exper. 7- Opened a doe the 11th day after coitus: ova very little larger than 

 the last, nor the foetus : there were but 2 ova, though several corporea lutea. 

 Some pellucid hydatids appeared hanging on the outside of the fallopian tubes. 

 Could these be ova which had missed the passage ? they were vascular : the heart of 

 the foetus was full of blood ; the umbilical vessels very distinct, but no chord as yet, 

 contrary to De Graaf. 



Exper. 8. Opened a doe the 14th day: 7 corpora lutea in 1 ovarium, and 1 in 

 the other; only 2 ova in the horns of the uterus, 1 in each; that in the horn next 

 1 of the ovaria with 1 corpus luteum was blighted, and the foetus invisible, even 

 with distilled vinegar; in the other it was increased proportionable to the time; the 

 umbilical chord now for the first time distinct, and the tail detached from the under 

 surface of the uterus; there was something unintelligible about the head, it was 

 bifid on the side next the mouth, with a hole in each extremity; the intestines were 

 now apparent, at least the rectum, as were the lower extremities. 



Exper. 9. Opened a doe the 6th day complete: found the ova loose in the 

 uterus, as described by De Graaf, and corresponding nearly to the corpora lutea, () 

 in one horn and 4 in the other; the ova were transparent, and of different sizes; 

 they were double, and contained each an internal vesicle; there was a spot on one 

 side in most of them, which 1 conceived to be the intended point of adherence be- 

 tween them and the uterus; the internal vesicle was not equally in proportion to 

 the external, but in some larger, in others less; I even suspect I saw something of 

 the foetus: a polypous excrescence in the uterus near the orifice of the fallopian 

 tube, had detained 4 of the ova at that place; others were scattered in the uterus: 

 just where one of these vesicles had become stationary a white vascular belt was be- 

 ginning to form, and in the middle of this a cavity where the vesicle lay; the inner 

 membrane I take to be amnion, the outer chorion. 



Exper. 10. Opened a doe the 7th day: the ovaria were shrunk; there were 

 something like 3 corpora lutea, but not distinct; there were 2 polypi or solid ex- 

 crescences in the left horn of the uterus, but no ova. 



Exper. 1 1 . The day after a doe had received the male I made a small opening on 

 the left side of the abdomen, got down upon the uterus just where the fallopian 

 tube goes off, tied the left tube close to the uterus, with a view to intercept the 

 ova. The result of this mentioned afterwards. 



Exper. 12. Opened a doe the 7th day after coitus: ova all fixed and adhering to 

 the uterus, even making a sensible swell in form of belts at different parts; the 

 amnion appeared in some nearer the chorion than in others; the liquor between 

 amnion and chorion very gelatinous, in many others less so. Saw nothing of 

 foetus. 



Exper. 13. Opened a doe 8th day after coitus: there were about 10 or 11 ova; 

 foetus distinct in almost every 1, but not without the application of distilled vinegar 



