8o 
Sir Everard Home on the existence ^ 
POSTSCRIPT. 
Mr. Bauer and myself at the same time, unknown to each 
other, having detected nerves in the human navel-string and 
placenta, I beg to communicate this discovery to the Royal 
Society, as a valuable addition to the Croonian Lecture, to 
which I wish it to be annexed as a Postscript. 
Mr. Bauer's delineation of these nerves makes it unneces- 
sary to give any verbal description of them. They were 
found in a specimen belonging to Mr. Brooks, which had 
been successfully injected, and preserved in spirit for forty 
years, which I borrowed for that purpose. 
Plate IV. 
Fig. 1 . A portion of the umbilical cord of the human pla- 
centa, in its natural form ; magnified four diameters. 
Fig. 2. The same portion unravelled, to show the situation 
of the nerves within it ; magnified four diameters. 
Fig. 3. A portion of the external membrane of the um- 
bilical cord, with part of the cellular substance, and a nerve 
adhering to it ; magnified four diameters. 
Fig. 4. The same nerve shown separately ; magnified ten 
diameters. 
Fig. 5. A portion of the amnion, with a double branch of 
a nerve passing across it ; magnified four diameters. 
