﻿30 



i'.ri.l.i: i l N M.>. i . S. LiF.l'Ai; I \l !•:> r 0] AGRIi IULTURE. 



The rations containing 15 and 25 per cent, respectively, of hog 

 kidney, each protected pigeons against polyneuritis for a period of 

 63 days and all the birds were in good condition at the end of the 

 test. The birds getting the ration that contained 15 per cent hog 

 kidney maintained their weight, and those getting 25 per cent hog 

 kidney in their feed gained an average of 8.9 per cent. On comparing 

 the results of the tests with ox kidney and hog kidney it appears 

 that they have practically the same antineuritic value. 



Figures 28 and 29 show the changes in the weights of the pigeons 

 fed the ox- and hog-kidney rations. 





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 Fig. 2S.— Dried ox kidney; changes in weights of pigeons fed. 



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Fig. 29.— Dried hog kidney; changes in weights of pigeons fed. 



TESTS WITH OX SPLEEN AND HOG SPLEEN. 



In Table 19 are presented the results of the feeding tests with 

 ox spleen and hog spleen. Fifteen per cent of ox spleen in a ration 

 was sufficient to protect three out of four pigeons against poly- 

 neuritis during a test period of 57 days, but the fourth bird devel- 

 oped the disease on the fifty-second day. The average loss in weight 

 of the birds was 13 per cent. Twenty-five per cent of ox spleen 

 protected four pigeons for 57 days and the average loss in weight 

 was 15.6 per cent. 



The feeding tests with hog spleen yielded results very similar to 

 those obtained with ox spleen. Fifteen per cent of hog spleen pro- 

 tected three pigeons against polyneuritis for 57 days, but one bird 

 developed the disease on the forty-ninth day. Twenty-five per 

 cent of hog spleen protected three pigeons for 57 days, but one bird, 

 No. 67, was greatly emaciated at the close of the test. Another 

 bird, No. 83, died on the forty-fourth day without having shown 

 any characteristic symptoms of polyneuritis. Every pen of pigeons 

 on the ox-spleen and hog-spleen diets lost considerably in weight, the 

 percentages ranging from 13 to 20.4. Figures 30 and 31 show the 

 changes in the weights of the pigeons fed the ox- and hog-spleen rations. 



