165

placed on accurately weighed diets given as above for classes A and B, and the
amount of nitrogen undergoing metabolism estimated. The figures obtained will
show that practical identical amounts of nitrogen were absorbed from the diet
of class A during the different periods, and from that of class B during the
different periods; thus again proving that the level of nitrogenous meta-
bolism is dependent on the quantity of absorbable protein offered in a diet,
and not affected, at least to any great extent, by the time during which an
individual has been on that diet.

     The work done in estimating the degree of nitrogenous metabolism
present during these periods also shows how very marked an influence a
diminution in the quantity of rice and dal and a substitution for them of a
certain amount of wheat ata or fish, has in raising the relative and actual
percentage of protein absorption.

     We shall first give an account of this work and then analyse the figures
collected to show the effects of the diets.

Puri Jail.

Investigations to establish the level of protein metabolism at the beginning and at the
     end of the six months' experiment: the two classes A and B of prisoners having
     been kept on their respective diets continuously during the whole period.

TABLE XXII a.

Class A.

Diet.

Five Ooriya prisoners observed over five consecutive days.