GENERAL MONTHLY MEETING. 



Monday y November 2, 1857. 

 ARNOLD KOGERS, Esq., V.P., in the Chaib. 



The following Gentleman was duly elected a Member of the 

 Society ; — 



Simon N. Dentz Amsterdam {Honorary). 



The following Gentleman was proposed for the Membership of the 

 Society : — 



John B. Lindsey Dover. 



Mr. Edwin Sercombe exhibited specimens of Irregular Develop- 

 ment of the Teeth. 



Mr. Dupp made the following communication on the "Materials 

 used by Dentists" 



The materials used in the manufacture of arti- 

 ficial teeth, some twenty-five years ago, were 

 either metallic or animal, with the occasional use 

 of a mineral substance. The metallic were gold, 

 silver, or platina. Gold then, as now, held the 

 first place among the metals, because of its duc- 

 tility, purity, and unoxidisable character in the 

 mouth. Silver was objectionable from too readily 

 oxidising ; and platina, from its great specific 

 gravity, extreme softness, and being difficult 

 to obtain commercially, was little used. Of the 

 animal substances, the tusk of the Hippopotamus 



