﻿32 



BULLETIN 1138, U. S. DEPARTMENT OF AGRICULTURE. 



mi' EFFE< 1' 01 HEATING I PON Till: antinm RITIC VALUE OF OX I.IVER. HEART, AND 



KIDNEY. 



Since liver, heart, and kidney are, of course, not used in a raw 

 condition as human food, it is importanl to know the effect of cooking 

 upon the antineuritic value of these tissues. In Tahle 20 are pre- 

 sented the results of feeding experiments with pigeons to test the 

 effects of heating upon the antineuritic properties of ox liver. The 

 changes in weight are shown in Figures 32 and 33. 



Table 20. — Effect of heating ox liver on its antineuritic value. 



Liver ration. 



Pigeon 



No. 



Survival 

 period. 



Change in 



weight. 



Result. 



TEX 59. 



30 per cent ox liver heated 2 hours at 100° C 

 Do 



91 

 92 

 93 

 94 



Days. 

 IS 

 20 

 20 

 35 



Per cent. 



-IS. 5 



-6.0 



-1S.0 



Polvneuritis. 



Hied 



Do 





Do 















23 



— 15.1 











FEN 60. 



30 per cent ox iiver heated 2 hours at 124° 



S6 



88 



89 



556 



25 

 23 

 17 

 24 



-16.8 

 -13.9 

 -17.6 

 -23.7 





Do 



"Do. 



Do 



Do. 



Do 



Do. 











22 



-18.0 











PEN 61. 



30 per cent ox liver heated 2 hours at 130° 



SI 

 S2 

 83 

 84 



25 

 32 

 30 

 35 



-24.3 

 -34.7 

 -44.9 



-27.7 



Do. 



Do 



Do. 



Do 



Do. 



Do 













31 



-32.9 











PEN 62. 



Do 



Do 



Do 



Do 



169 

 170 

 171 

 172 

 173 



70 

 43 

 65 

 48 

 70 



-4.2 

 , -9.8 

 -25. 4 

 -2.9 

 -1.5 



Do. 

 Polvneuritis. 



Do. 



Do. 

 Fair condition end of test. 







59 



-11.0 











PEN 63. 

 25 per cent ox liver baked 30 minutes at 186° 



4 

 5 



6 



42 

 55 

 55 



-12.1 

 +3.7 



+ 1.6 



Polyneuritis. 



Fine condition end of test. 

 Do. 



Do 



Do 







51 



-2.3 











Pen 59 was fed a ration which contained 30 per cent of liver that 

 had been heated two hours in live steam at 100° C. The liver was 

 first dried in the usual way and then spread out in a thin layer in 

 pans and heated in an Arnold sterilizer for two hours and again 

 dried. The result of the feeding test with the ration containing 30 

 per cent of this lot of liver indicates that the antineuritic value of 

 the tissue had been largely destroyed. One pigeon developed poly- 

 neuritis on the eighteenth day, another on the twentieth day, a third 

 died on the same day without positive symptoms of polyneuritis, 

 while the fourth bird was in fair condition on the thirty-fifth day 

 when the test was concluded. 



