RICKETS 



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Schabad (1089). Schabad's findings on the deficient resorption of 

 calcium were corroborated by Dibbelt (1090). 



The study of the influence of the composition of the diet on the 

 utilization of calcium gives some interesting results. The effect of 

 protein was investigated by L. F. Meyer (1091) and by Tada (1092). 

 They found that the nitrogen elimination did not go parallel with the 

 calcium output. The influence of fats was studied by Meyer (I.e. 

 1091), Rothberg (1093) and Orgler (1094). They found, surpris- 

 ingly, that the addition of fats (in the form of whole milk) acted 

 unfavorably on the calcium utilization, losses occurring in the feces 

 in the form of soaps. The following figures were obtained on com- 

 paring the effect of cod liver oil and butter on the calcium balance: 



Hess (1094a) demonstrated the unfavorable influence of butter. 

 On the other hand, Telfer (1094b) found that fat, whether in the 

 form of cod liver oil or butter, has no influence on the calcium 

 metabolism. It should be noted, however, that the duration of his 

 experiment was too short (4-5 days) ; besides, the child under investi- 

 gation was not rachitic. Hutchinson (1095) found that the soap 

 elimination in rachitic stools was somewhat decreased, 2.2 grams 

 instead of 2.5 grams in normal children. In addition, he (1096) 

 found that the fat loss can be very large in a voluminous stool, giv- 

 ing a negative balance, under certain conditions, of 0.6 gram per 

 day; the fat sometimes constitutes one-third of the total volume 

 of stools. 



Holt, Courtney and Fales (1097) demonstrated a large loss of 

 fat in the feces. However, the poor utilization of calcium after 

 the addition of milk fat (butter) could not be corroborated by these 

 investigators (1098). 



