76 SKELETON. 



now been repeatedly tried, with complete success, on the cylin- 

 drical bones, and, in one instance, upon the lower jaw.* 



Callus is formed much more speedily in young persons than 

 in old: occasionally, however, we meet with cases in which the 

 rapidity of its deposite in the latter is remarkable. I, for ex- 

 ample, treated, in 1826, a female of ninety, for a simple frac- 

 ture of the os humeri, which was cured at the end of five 

 weeks. 



* Dorsey's Elements of Surgery. Philadelphia Med. and Phys, Jour. &c. 

 There is now in the possession of Dr. J. Randolph, the son-in-law of the late 

 Dr. Physick, the os humeri upon which this experiment was first tried, and 

 which shows, very satisfactorily, the state of union : a hole is still left which 

 the seton occupied, 



