﻿34 



BULLETIN 1138, U. S. DEPART.M KXT ()!•' AGBICULTURE. 



birds with those from pens 59 to Gl, inclusive, it is apparent that 

 frying caused a much smaller destruction of the antineuritic vitamin 

 in ox liver than the other methods of heating. By comparing the 

 results obtained from pen 62, Table 20, with those from pen 37, Table 

 13, it appears that the fried liver had an appreciably lower antineuritic 

 value than the uncooked product. 



Pen 63 was fed a ration which contained 25 per cent of ox liver that 

 had been baked 30 minutes in an oven at 1S6° C. The liver was sliced 

 as for frying and then baked in a gas oven until cooked through. The 

 cooked liver was ground and dried. One bird in this pen developed 

 polyneuritis on the forty-second day, but the other two were in good 

 condition on the fifty-fifth day when the test was concluded. The 

 baked liver appeared to have practically the same antineuritic value 

 as the fried product. 



The effect of cooking on the antineuritic values of ox heart and 

 kidney is shown in Table 21, and the changes in the weights of the 

 pigeons fed are seen in Figure 34. The heart was washed free of blood 

 and then cooked in boiling water for 75 minutes and finally baked for 



Table 21. — Effect of cooking upoji the antineuritic value of ox heart and kidney. 



Heart and kidney rations. 



Pigeon 

 No. 



Survival 

 period. 



Change in 

 weight. 



Result. 



PEN 64. 



68 

 69 

 70 



71 



Bays. 

 59 

 37 

 22 

 59 



Per cent. 

 - 3.2 

 -18.0 

 -12.1 

 + 1.9 





Do 



Polyneuritis. 



Do 



Do. 



Do 



Good condition end of test. 











44 



- 7.9 











PEN 65. 



41 

 42 

 43 

 44 



20 

 50 

 24 

 56 



- 4.6 

 -21.7 



-12. :>> 

 -31. 3 



Polyneuritis. 



Do 



Do. . 



Do. 



Do... 



Very thin end of test. 









38 



-17.5 











PEN 66. 



25 per cent cooked ox kidney 



Do 



Do 



Do 



45 

 46 

 47 

 48 



54 

 56 

 56 

 56 



-10.0 

 -18.8 

 -16.0 

 - 7.2 



Polyneuritis. 



Fair condition end of test. 



Do. 



Do. 



Average 







56 



-13.0 





S<30 



360 



4 3-20 



\ soo 



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 ^ 260 



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 200 



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Fig. 34. — Cooked ox heart and ox kidney; changes in weights of pigeons fed. 



