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appear to be the determining factors of the several causes that go to relegate,
fix and maintain the position of a people, tribe or race in the scale of mankind.
Of all the different races that we have investigated the scale of the relative de-
velopment, vigour and general muscularity is easily fixed. The following may be
taken as showing how the several tribes would be placed, together with the several
degrees of nitrogenous metabolism per kilo of body-weight to which they
attain:—

      The close relationship between the nutritive value of the several dietaries and
its influence on the physical development of the different peoples of Bengal is
clearly brought out by this list with its accompanying scale of nitrogenous
metabolism.

       The aboriginal tribes of Chota Nagpur.—We shall conclude, and complete the
work done in Bengal, by a short summary of the information supplied us with
regard to the aboriginal tribes inhabiting the Ranchi plateau.

       Major Maddox, I.M.S., Civil Surgeon, Ranchi, kindly collected this informa-
tion for which we are most grateful.

      In Part I, Chapter II, Section (2) (c), will be found an account of the experi-
mental work carried out on representatives of four of the principal tribes, viz.,
Pater, Moonda, Swansi and Uraon.

       We found on the whole that the level of nitrogenous metabolism was distinctly
on a higher scale with these men than was the case with Bengalis and Ooriyas
on a similar diet. What the true explanation of this is we are not in a position to
state.

       If we had obtained similar results with the Darjeeling tribes it might have
been justifiable to assume that people inhabiting the hills, and accustomed to
a better diet than inhabitants of the plains, were able to absorb a higher percentage
of the protein from an identical diet. But, while the Darjeeling tribes did show a
slightly better protein absorption than Beharis on the same diets, the difference
fs too small to be any proof that such an assumption is absolutely right.

       The characteristics on which we laid such stress when discussing the Darjeeling
hill-tribes are also to be found amongst these aborigines. While of no great size,