q6o Sir EveRard Home on the passage of the ovum 
peared, but in a strong light was still visible in the micro- 
scope. 
“ When quite dry, its colour changed to a light yellowish 
brown, and it lay quite loose on the glass, except at the upper 
extremity, where I attempted to open it ; it was strongly 
glued to the glass, and it required several times to be mois- 
tened at that part with water, to remove it from the glass. 
“ I have now placed it between two pieces of talc in an ivory 
slider; and in a strong light the two corpuscules may still 
be seen through a common magnifying glass.” 
The drawing of the uterus (PI. VIII.) is of the natural size : 
the parts are so distinct that no letters of reference appear to 
be necessary to point them out. The ovum is shown exactly 
in the spot in which it was discovered, with the appearance 
which it at that time put on. 
The drawings of the ovaria and Fallopian tubes are magni- 
fied four times, to give a more exact notion, than could be 
otherwise done, of the canal through which the ovum passes, 
before it arrives at the cavity of the uterus. The appearance 
the corpora lutea put on, is the most exact representation 
from nature. In the right ovarium, cells remain where former 
ova had been formed, and one corpus luteum, which is cut 
through the middle, has made considerable advance in its for- 
mation, another appears to be in a much earlier stage, all the 
different orifices are the transverse and oblique sections of 
blood vessels. 
In the left ovarium, the opening through which the ovum, 
the subject of the present Paper, passed out, is distinctly seen, 
and the cavity in which it was contained, is filled with coa- 
gulated blood in a laminated form ; behind this, the glandular 
