634 METABOLISM, NUTRITION AND DIETETICS 



of ' artificial ' foods. The factor of safety, however, is very large 

 and the dietary of an individual or the dietetic habits of a nation 

 may be changed from top to bottom, if the change is scientifically 

 effected, without serious detriment, at least for a long time. The 

 greatest experiment of this kind in the history of the world is now 

 being worked out over a large part of Europe. 



