33 2 Mr ' White on the Regeneration 
of the inje&ion entering but on one fide of the 
cicatrix, yet the arteries, on both Tides, were 
perfectly injedted, a convincing proof, that they 
muft have regenerated, for it cannot be fup- 
pofed that the mouths of fo many fmall veffels 
could poffibly have coaptated, fo as to have con¬ 
tinued the circulation through the cicatrix. 
I had the fatisfadlion of feeing both the pre¬ 
paration and an engraving from it, which, it 
is hoped, the dodlor will favour the public with, 
together with the feveral other valuable experi¬ 
ments.*' 
Teeth have regenerated in every period of 
life. Mr. Thornton, a very ingenious medical 
fludent at Edinburgh, informed me, that he had 
a found tooth drawn by miftake fome years ago, 
which as foon as he found out he immediately 
replaced. It grew again, and was as good in 
every refpedl as any other. But in procefs of 
time, this tooth began to decay, and give him 
pain, which became exquifite whenever the tooth 
was touched, even in the flightefl manner. He 
therefore had it drawn, and one of the fangs was 
found to be carious. From this it is very evi¬ 
dent, that nerves will grow again, after being 
difunited. 
* Since this paper was read before the Society, Dr. Monro 
has publifhed his ufeful and ingenious obfervations on the 
nervous fyftem, with the engravings of thefe preparations. 
Vid. Tab. XLVI. and Tab. XLVII. 
Mr, 
