170 m'cay. 



dietaries and its influence on the physical development of the different 

 tribes and races that we have investigated is clearly brought out in the 

 following scale of the degree of nitrogenous interchanges : 



First. Bhutias 



Grams of 



nitrogen per 



kilo body 



weight. 



Nepalese Bhutias 



s 0.42 



Tibetan and Bhotan 



s 0.35 



Sikkim Blmtias 



0.25 



Second. Nepalese 



0.1S-0.25 



Third. Behari 



0.15 



Fourth. Bengali and Ooriya 



0.116 



We have only taken into account the inhabitants of Bengal, as the 

 work in other provinces is not yet completed; but nothing we have 

 learned in further investigations has tended to contravert the opinion 

 we have expressed; on the contrary, the more the subject has been 

 gone into the stronger the evidence becomes of the correctness of our 

 views. Every possible cause, except diet, has been put forward as offer- 

 ing a complete explanation of the inferior capabilities of the Bengali as 

 compared with those of the great races of the plains of India. We have 

 discussed these hazy, ill-defined influences, and, while admitting the 

 probable force of some of them, have eliminated them by contrasting 

 races in which all the factors are identical, but in which diet alone 

 forms the distinguishing element, or, more correctly, in which the level 

 of protein metabolism forms the great line of demarcation. We con- 

 clude from the studies that absorbable protein is the all-important 

 element in the physical development and general well-being of mankind. 



8 Diet very highly animal. 



