224 Journal of Agricultural Research voi. xxvn. no, 4 
ration consisted of polished rice 64 parts, casein 13.4 parts, salt mixture 
2.4 parts, butter fat 5 parts, agar 2 parts, and dextrin 13.2 parts, carrying 
the extract of 5 gtn. of wheat embryo per 100 gm. of ration, were no better 
than the growth curves of the rats of Lot 4 of this experiment, whose 
ration contained but 5 per cent of additional protein and no addition of 
vitamin B. 
Although cereals contain an abundance of vitamin B, it was thought 
that wild rice might be deficient in this factor because the parching pro¬ 
cess, often used to remove its hulls, might also char the embryo, which 
is probably the principal source of this vitamin. A different series was 
carried out, therefore, along the lines described in connection with Figure 
1, using wild rice as before, with butter fat and casein, but with the addi¬ 
tion of the alcoholic extract of 15 gm. of wheat embryo to each 100 gm. 
of ration. The same salt mixture was fed as before. The results of 
these feedings are graphically represented in figure 2. 
The ration of Lot 6 (fig. 2) consisted of wild rice 91 parts, salt mixture 
4 parts, and casein 5 parts. The rice carried the alcoholic extract of 
15 gm. of wheat embryo per 100 gm. of ration. The failure of these 
rats to grow normally was due to the absence of vitamin A. 
The ration of Lot 7 (fig. 2) consisted of rice 91 parts, salt mixture 4 
parts, and butter fat 5 parts. As before, the rice carried the alcoholic 
extract of 15 gm. of wheat embryo per 100 gm. of ration. This addition 
of the vitamin B preparation was made to ascertain whether the ration 
of Lot 3 (fig. 1) was deficient in this factor. The addition caused no 
improvement. This result, together with the fact that excellent growth 
was obtained when casein was added to the ration of Lot 3, producing 
the result shown in Lot 4, proves that wild rice contains an adequate 
amount of vitamin B for growth. 
The ration of Lot 8 (fig. 2) consisted of rice 86 parts, salt mixture 4 
parts, butter fat 5 parts, and casein 5 parts. Again the rice carried the 
alcoholic extract of 15 gm. of wheat embryo per 100 gm. of ration. This 
ration was fed in order to find out if the ration of Lot 4 (fig. 1) was 
deficient in vitamin B. As no better growth was obtained, it can be 
concluded that the ration of Lot 4 is not deficient in this factor. It 
was unfortunate that the experiment had to be terminated before repro¬ 
duction occurred. 
CONCLUSIONS 
(1) Wild rice is not an adequate food. 
(2) Although chemical analysis shows a higher percentage of protein 
present than in many cereals, wild rice resembles many other cereals in 
containing proteins of rather low biological value. It further resembles 
other cereals in containing inorganic material unsuitable for the promo¬ 
tion of growth, and in being very deficient in vitamin A, although enough 
4)f this vitamin is present to prevent xerophthalmia. 
(3) Wild rice has a greater food value than the cultivated polished rice, 
because its proteins are of better quality and because it contains adequate 
amounts of vitamin B for animal growth, which is not true of the polished 
cultivated rice. 
