168 MALL. [VoL. XIX. 
stairs, and this was followed with some tenesmus. Four days 
later I examined her and found a free flow of unstained mucus 
from the uterus, with tenderness, hypereemia of the pelvic 
organs and irregular pains. I requested a specimen of urine, 
which was given me on the following day. It was found 
loaded with pus and blood, and also contained the ovum. 
Two days later the decidua was discharged. The specimen 
was preserved in 50 per cent alcohol. Shortly after this the 
woman became pregnant again, which went on to full term.” 
The abortion from the above data took place 40 days after 
the beginning of the last menstrual period. When the ovum 
came into my hands, three years later, it was well preserved 
> 
Fic. 71.—Photograph of the ovum. Enlarged 2 diameters. 
and had not been opened. The villi are well developed and 
even, but slightly deficient on one side. I cut the specimen in 
half around its greatest circumference and then stained the 
two halves. Within there was a small amount of magma 
reticulé and at the bottom of one of the shells of chorion there 
was found a very small nodule. Otherwise there is nothing 
within the ovum. The nodule was imbedded and cut into 
sections 20 microns thick. 
The syncytium and the chorion appear normal. There are 
no blood-vessels. The nodule within the chorion is a solid 
mass which appears in structure like dried red blood corpuscles 
of the frog. 
No. 77. 
Ovum, 70 x 40 x 30 mim. 
Dr. Horn, Baltimore. 
The fresh specimen was sent to the laboratory and it was 
immediately preserved in strong alcohol. After it was hard- 
