7 6 Dr. Baillie’s Account of a 
old, this brings the date of the impregnation to an earlier 
period than can well be believed. From all thefe circum- 
iiances we might be led to fuppofe, that the formation of the 
hair and teeth was not in confequence of any connection with 
a male, but arofe from fome aCtion of the ovarium itfelf, in 
which the uterus did not participate. The exiftence of the 
hymen, efpecially in fo young a girl, becomes a collateral 
confirmation of the fame opinion, although much is not to be 
refted on it, when taken fingly. 
It will, perhaps, have fome influence in removing the pre- 
judices againft this . opinion, to make the following remarks* 
Hair is occafionaMy formed in parts of the human body, which 
are abfolutely unconnected with generation. Encyfted tumours 
are fometimes found containing hair. Mr. Hunter has a 
preparation of this fort in his collection, which he cut out from 
under the fkin of the eyebrow. This tumour was perfectly 
complete, and unconnected with the fldn r except by the com- 
moo intervention of cellular membrane, fo as to have no 
communication whatever with the hair of the eyebrow* 
In this inftance there was certainly a fpecies of generation 
taking place in the encyfted tumour itfelf, forming hairs as 
completely and fully as in the common progrefs of the forma- 
tion of a child. Such encyfted tumours have been found in 
other parts of the human body, and ftill more frequently in 
quadrupeds. Mr. Hunter has in his collection many fpeci- 
mens of encyfted tumours from cows and ftieep containing hair 
and wool. Thefe were perfectly complete, fo as to have pof- 
ieffed a power of production within themfelves, and were many 
of them found deeply feated at a confiderable diftance from 
the fkin, which is the common parent of hair. In thefe tu- 
mours there is often the appearance of layers of cuticle, which is 
z probably 
