426 Mr. Hammond and Dr. Marshall. Correlation between 



stained with Sudan II, when fat globules were seen. The fluid when collected 

 had the appearance of ordinary milk, and yielded a flocculent precipitate when 

 treated with dilute acetic acid. 



(14) A rabbit, 10 months old, was injected every day with boiled foetus 

 extract together with boiled placenta extract from the 11th to the 

 24th days, after a sterile copulation, the Fallopian tubes of the rabbit having 

 been previously cut and portions removed. The rabbit was killed on the 

 27th day. Old corpora lutea were found in sections through the ovary. The 

 alveoli of the mammary glands showed signs of atrophy, but the ducts and 

 some of the alveoli contained milk. Before killing, a serous milky fluid was 

 expressed from the nipples. The milk was tested as before, and found to 

 contain some fat and albumen. 



(15) A virgin rabbit, 11 months old, was rendered sterile by the Fallopian 

 tubes being severed. It was then injected with boiled extract of uterus from 

 the 11th to the 24th days, after a sterile coition. The rabbit copulated again on 

 the 29th day, and was immediately afterwards killed. Old corpora lutea were 

 found in the deeper parts of the ovary and several apparently ripe follicles on 

 the surface. The mammary glands contained milk. Previously milk had 

 been expressed from the nipples on the 19th, 21st, 27th, and 29th days after 

 the sterile coition. The milk of this rabbit, collected in a test-tube, had the 

 appearance of normal milk, and samples under the microscope were seen to 

 contain globules of fat. 



(16) A rabbit was injected with boiled uterus extract from the 11th to 

 the 24th day after a sterile coition. Milk was expressed from the nipples 

 on the 19th, 21st, 27th, and 29th days. The milk was collected and examined 

 as in the previous case (No. 15). The rabbit copulated a second time with a 

 vasectomised buck on the 29th day ; 30 days later the rabbit copulated 

 again and on the same day milk was expressed from the nipples ; 28 days 

 later milk was again expressed from the nipples. Next day the rabbit 

 copulated again. Then on the same day 1 c.c. of pituitary extract was injected 

 and the animal killed. The mammary glands were well developed, but 

 showed signs of involution. They were full of milk. The ovaries contained 

 old corpora lutea and ripe follicles. 



(17) A rabbit was injected daily with boiled placenta and foetus extract 

 from the 11th to the 24th day after a sterile coition. Milk was expressed 

 from the nipples on the 19th, 21st, 27th, and 29th days, and was collected 

 and examined as in the preceding cases. On the 29th day (June 16) 

 the rabbit again underwent a sterile copulation ; 28 days later (July 14) 

 although not pregnant, the rabbit plucked its fur from its breast and made a 

 nest as if preparing for parturition. On the same day milk was expressed 



