148 DELLA DRIPS 
Microscopic observations of the uterus. Fixative, formalin zenker. 
Stain, hematoxylin and eosin. Cross-sections through the horns and 
body of the uterus show much fibrosis of all the layers. There is 
much less muscular and glandular tissue than in a normal inactive 
uterus (compare figs. 3 and 5, 4 and 6). One striking feature is the 
number of obliterated blood-vessels with hyalinized walls. The lumen 
of the uterus is closed and no mucous secretion is present. The cervix 
shows these same changes to an even greater degree than the rest of 
the organ. 
Experiment 201-15 (spermophile 140). Captured in the spring of 
1915. Weight, 101 grams. Operated on May 28, 1915. The ovaries 
were completely removed. 
Gross observations. The uterus is in the condition of early involu- 
tion. 
Postoperative notes. This animal became very fat and went into 
a torpid condition at times. On July 24 it was changed to a cage with 
two other animals who killed it. The body was badly traumatized 
and specimens were not saved. 
Experiment 202-15 (spermophile 141). Captured in the spring of 
1915. Weight, 108 grams. Operated on May 28, 1915. Both ovaries 
were removed. 
Gross observations. The uterus is undergoing involution. 
Died September 21, 1915. 
Gross and microscopic observations of the uterus. Fixative, for- 
malin zenker. Stain, hematoxylin and eosin. This uterus appears 
very similar to the uterus of a normal animal killed the same day. 
Experiment 218-15 (spermophile 142). Captured in the spring of 
1915. Weight, 135 grams. Operated on June 3, 1915. Both ovaries 
were removed. 
Gross observations. The uterus is undergoing involution. 
Sacrificed November 10, 1915. 
Gross and microscopic observations. Fixative, formalin zenker. 
Stain, hematoxylin and eosin. The uterus is very similar to the uteri 
of the controls. 
Experiment 220-15 (spermophile 151). Captured in the spring of 
1915. Operated on June 28, 1915. Both ovaries were removed. 
Gross observations. The uterus has become completely involuted. 
The uterus was removed September 28, 1915. 
Gross and microscopic observations. Fixative, formalin zenker. 
Stain, hematoxylin and eosin. Compared with a normal control, this 
uterus shows no abnormalities. . 
Experiment 423-15 (spermophile 231). Captured in the spring of 
1915. Weight, 200 grams. Operated on September 22, 1915. Both 
ovaries were removed. 
Sacrificed March 18, 1916. Weight, 100 grams. 
Gross and microscopic observations of the uterus. Fixative, for- 
malin zenker. Stain, hematoxylin and eosin. This uterus shows the 
‘same changes as that of spermophile 139. 
