738 



FRANCIS H. McCRUDDEN 



TABLE 1 



COMPOSITION OF NORMAL BONE 



TABLE 2 



COMPOSITION OF BONE IN OSTEOMALACIA 



The calcium in the dried bone may be decreased to nearly one-half 

 its normal value (Table 3). 



TABLE 3 



PERCENTAGE OF CALCIUM OXID IN DRIED BONE 



Normal 



Not only the calcium of the bone as a whole, but also the amount of 

 calcium in the ash is decreased (Table 4). In other words, the relative 

 amount of the other mineral constituents of the ash is increased. 



The amount of P 2 O 5 in the dried bone is decreased (Table 5). On 

 comuaring Table 3 with Table 5, it will be seen the decrease in phosphate 

 is only to about two-thirds the normal, whereas the decrease in calcium 

 in the same cases is to nearly one-half the normal. In other words, the 

 ratio P 2 O 5 : CaO in the bones in osteomalacia is greater than the normal 

 ratio. 



