BONES. 241 



Human. Ox. 



Phosphate of lime, 81-9) gg, QQ.* 

 Fluate of lime, . 3-0 / 



Lime, . 10-0 9-3 1-45 



Magnesia, . . 0-3 1*10 

 Phosphate of magnesia, 1*1 



Soda, . 2-0 2-0 3-75 



Carbonic acid, . 2-0 2-0 3- 



190-0* 100-0 100-0 



The loss in the analyses varied from 1 to 1 J per cent The 

 proportions varied somewhat in different specimens of bone. It 

 is obvious that the bone ashes had been exposed to so strong a 

 heat as to drive off the carbonic acid from the carbonate of lime. 

 Now 10 lime requires 7 '8 5 carbonic acid to convert it into car- 

 bonate. Hence the carbonate of lime must have amounted to 

 17-85 per cent. From this it appears that the proportion of 

 phosphate of lime to carbonate of lime in human bones approaches 

 pretty nearly to that in sheep bones. 



The following table exhibits the results of several analyses of 

 bones made by me : 

 1. Human thigh bone. 



Cartilage, . 39-12 . 35-93 



Phosphate of lime, 43-67 . 51-12 

 Carbonate of lime, 14-00 . 9-77 



Magnesia, . 0-49 . 0-63 



Soda, . 2-00 . 0-59 



Potash, . 0-06 . trace 



99-34 98-04 

 2. Ileum of a sheep. 



Cartilage, . 43-30 . 47-20 



Phosphate of lime, 50-58 . 46-35 



Carbonate of lime, 4-49 . 4-88 



Magnesia, . 0-86 . 0-64 



Soda, . 0-31 . 2-09 



Potash, . 0-19 0-25 



99-73 101-41 



* Gehlen's Jour. (2d series,) iii. 1 ; or Afhandlingar, i, 216. 



Q 



