DEFICIENCY DISEASES 281) 



The former has observed children who have hved a long time in per- 

 fect health on a diet with a minimum of vitamine-containing fats.*° 

 McCollum finds that rats develop a condition apparently identical 

 with true rickets when kept on a diet deficient in any two of the three 

 essentials, viz., protein, calcium, fat-soluble A. A diet lacking only 

 one essential seems to be well borne. 



"Jour. Amer. Med. Assoc, 1920 (74), 217. 



