INTRODUCTORY OBSERVATIONS. Jxv 



cdf like a pair of gloves, frequently in a year, 

 without any material inconvenience attending the 

 change. 



Were it poffible to afcertain the fad, I fiiould 

 fuppofe that many parts of the human body 

 would reproduce. The fides of a wound unite, 

 and pieces of flefh are always -regenerated. There 

 is much reafon to think that fome part of a mu- 

 tilated limb might be reproduced, was it not 

 from the methods pra6tifed in healing the wounds. 

 Examples of human reprodudions are numerous. 

 An inftance lately occurred of a child born with 

 two thumbs on one hand, and each with a perfed 

 nail. When the child was fhree years old, the 

 fupernumerary thumb was amputated ; however, 

 it grew again, bearing a nail. It was cut off a 

 fecond time, yet a third thumb like the iirft wa$ 

 reproduced. 



The ends of fradured bones will grow j nay, 

 entire bones have fometimes been regenerated. 

 The head, neck, and part of the os humeri, we 

 are alfured, have been repaired. The complete 

 bone of the leg, between the joints, was extracted 

 by an operation j it was afterwards fully repair- 

 ed.. The whole has been caft off by exfoliation,' 

 and a new bone grown in its place, 



Vo^- I" f There 



