USED BY DENTISTS. 6 



alloy, and other white metals as substitutes for 

 gold and silver, was considered unjustifiable even 

 where economy was a consideration. Gutta- 

 percha as a base on which to construct artificial 

 teeth, had not realized the sanguine expectations 

 of those who introduced it, and was only applicable 

 under certain temporary circumstances. 



B 2 



