Naturalist. 
delicate walled ovum to expand in the 
form of a vesicle, and distend the 
uterine walls by virtue of the growth 
fj, of its cells; it must be therefore con- 
cluded that it obtains some support. 
This support is rendered from within. 
The vesicle contains a transparent 
fluid, the nature of which I am only 
sufficiently conversant with to say 
that, after a treatment with alcohol, 
a white precipitate is present in the 
s vesicle. It is equally evident that 
\'_ this fluid can only have been obtained 
from the uterus, and that it is present 
within the vesicle at a 
very considerably great- 
er pressure than in the 
uterus itself Such a 
condition is caused by 
means ofthccdls of the 
wall of the vesicle, this 
function being perform- 
ed against a pressure 
which \-^ greater on their 
inner than on their outer 
side, cxactl> as the cells 
of the salivary glands 
are known to act The 
uterine fluid is secreted 
by glands present m 
great numbeis in the 
uterine tissue, and is 
poured through their 
open mouths into the 
cavity of the uterus 
}^ i.'m. 
