﻿24 



BULLETIN L138, r. s. DEPARTMENT <>!•' ACKH 'I I . i i i;i:. 



periods and the changes in weight of the three pens of pigeons, it is 

 apparent that neither 5 nor L5 per cent of ox liver in the ration was 

 sufficient te protect the birds against polyneuritis for any considerable 

 tune, but that 30 per cent of ox liver was sufficient to protect three 

 pigeons for at least L05 days. Each of the three pigeons had gained 

 in weight and was in fine condition at the close of the test, but the 

 fourth bird getting the same ration developed polyneuritis on the 

 ninety-third day. The changes in weight of the pigeons arc shown 

 in Figure 21. 



Table 13. — Experimental feeding of dried ox liver and polished r< 



Liver ration. 



Pigeon 

 No. 



Survival 

 period. 



Change in 



weight. 



Result. 



PEN 3.3. 



5 per cent ox liver 



Do 



Do 



Do 



110 

 114 

 115 

 117 



Days. 

 44 

 39 

 45 



40 



Per cent. 

 -15.3 

 -28.2 

 -17.0 

 -22.9 



Polyneuritis. 

 Do. 

 Do. 

 Do. 



Average 



42 



-20.9 





PEN" 36. 



1 5 per cent ox liver 



Do 



Do 



Do 



116 



US 

 119 

 121 



55 

 40 

 37 



45 



-14.8 



-10. S 

 -1.8 



-10.0 



Fair condition at end of test. 

 Polvneuritis. 



Do. 



Do. 



Average 



44 



- 9.4 





PEN" 37. 



30 per cent ox liver 



Do 



Do 



Do 



120 

 123 

 124 

 214 



105 

 105 

 105 

 93 



+ 19.3 

 + 9.9 

 + 2.4 

 -.1.3 



Fine condition at end of test. 



Do. 



Do. 

 Polyneuritis. 







102 



+ 7.6 















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Fig. 21. — Dried ox liver; changes in weights of pigeons fed. 

 TESTS WITH CALF LIVER. 



The results of the feeding tests with calf liver are shown in Table 14. 

 Three pens of pigeons were fed rations which contained 5, 15, and 30 

 per cent, respectively, of calf liver. On taking into consideration 

 both the survival periods of the pigeons and their changes in weights, 

 it is evident that the ration which contained 5 per cent calf liver had 

 the lowest antineuritic value, followed in turn by those containing 

 15 and 30 per cent of the tissue. The changes in the weights of the 

 birds are seen in Figure 22. 



