Horny Excrefcences of the Human Body . 99 
felves on this fubjedt (hew plainly, that they did not under- 
ftand the nature of the difeafe, and their accounts of it are not 
very fatisfa&ory to their readers. 
In the Kphemertdes Academue Nature Curtoforurn there are two 
cafes of horns growing from the human body. One of thefe in- 
fiances was a r German woman who had feveral fwellings, or 
ganglions, upon different parts of her head, from one of 
which a horn grew. The other was a nobleman f, who had a 
fmall tumor, about the fize of a nut, growing upon the parts 
covering; the two l&ft or lowermoft vertebrae of the back. It 
o 
continued for ten years, without undergoing any apparent 
change; but afterwards enlarged in fize, and a horny- excref- 
cence grew out from it. 
In the Hiftory of the Royal Society of Medicine j, there is 
an account of a woman, 97 years old, who had feveral tu- 
mors on her head, which had been 14 years in growing>to the 
Rate they were in at that time : die had alfo a horn which' had 
originated from a fimilar tumor. The horn was very move- 
able, being attached to the fcalp, without any adhefion to the 
fcull. It was fawn off, but grew again, and although the ope- 
ration was repeated feveral times, the horn always returned. 
Bartholine, in his Epiftles §, takes notice of a woman 
who had a tumor under the fcalp, covering the temporal 
mufcle. This gradually enlarged, and a horn grew from it, 
which had become twelve inches long in the year 1646, the 
time heTaw it. He gives us a reprefentation of it, which bears 
a very accurate refemblance to that which I have mentioned 
to have feen in November 1790. No tumor or fwelling is 
* Ephem. Acad. Nat. Cui% Dec. iii. An. V. Append, p. 148. 
f Ibid. Dec. i. An. I. Obfervat. 30. 
X Hifloire de la Societe Royale de Medecine, 1776, p. 316. 
§ Epiflol. Thom* Barthql. 
O 2 
exprefled 
