ts 



teeth, and entirely wanting in the enamel of the 

 teeth. FOURCROY and VATJ&TJELIN had found 

 27 p. c. combustible matter iii the enamel. PE- 

 1YS only 16 p. c* but I could not find 2 p. c. of 

 it. MERAT-GTJILLOT has instituted a compara- 

 tive investigation on the bones of several ani- 

 mals ; but it has produced very incorrect results. 

 While I found* for instance, in the human bones 

 and those of the bullock, the same constituent 

 parts, and nearly the same proportions, he found 

 93 p. c. phosphate of lime in the latter ^ and 67 in 

 the former. The cartilage, which is the ani- 

 mal constituent part of the bones, is so closely 

 united with the bone-earth, that they constitute a 

 common whole, of a texture, which withstands 

 considerable impressions, and of a chemical com- 

 position, which, when the bones have not been 

 moistened, has preserved itself unaltered for se- 

 veral centuries. In later times w r e have known 

 how to profit by PAPIN'S excellent discovery, of 

 extracting from bones a good and salutary nutri- 

 ment, which in his days was disregarded. PAPIN 

 had shown to Charles II. of England, that it was 

 possible to extract a jelly from the bones, and had 

 engaged within 24 hours with eleven pounds of 

 charcoal to prepare 150 pounds of a jelly, which 

 he recommended to be used in workhouses and m 



