﻿VITAMIN B IN EDIBLE TISSUES OF OX, SHEEP, AND HOG. 7 



of high antineuritic value is heated in an autoclave for two hours at 

 130° C. its protective properties are practically destroyed. For these 

 reasons all the polished rice which was used in subsequent experi- 

 ments as a base in the rations with muscle, was heated two hours at 

 130° C. in an autoclave. The change in weight of the pigeons in 

 pens 1, 2, and 3 is shown graphically in Figure 4, at the end of this 

 paper. The marked and rapid decrease in the weights of the birds 

 is at once apparent. 



/^E/V^ PE/V*? 



^/CE rf£/9r££? s^/CE /SES?rE£> 

 2 /iOt/&^ //V 2 /-/O'J&S /// 

 pen / /?<yrcCL/?^E s?r /?t/rocLs?//E /?r 



(SA/rPE/?r£D P/CE /3C°C /SO°C 



/<SO 



ESPCA/ MO/e/ZO/vrrt/. ^P/9CE PEPPESENTS /O P/9KS 



Fig. 4. — Variations in weight of pigeons resulting from feeding polished rice. The 

 numbers opposite beginnings of lines refer to Pigeon Nos. of tables. 



The graphs presented in Figures 4 to 45, inclusive, are based upon 

 the weights of the pigeons recorded at approximately weekly intervals 

 during the experiments, except that the weight of any bird suffering 

 from a congestion of food in its crop, an early symptom of poly- 

 neuritis, was not recorded. Since most pigeons that develop poly- 

 neuritis suffer from this condition of the crop, it was found to be 

 inadvisable to weigh each bird at the time it developed polyneuritis. 

 For this reason, then, the graph of a pigeon usually indicates a shorter 

 period than the survival period for the same bird recorded in the 

 table. Occasionally a graph may indicate a slightly longer period 

 than the survival period shown in the table. In such cases the crop 

 of the bird was normal and the last weighing was made a few days 

 after the development of the disease. The percentage change in 

 weight of each pigeon, as indicated in the tables, is based upon the 

 initial weight and upon the last normal weight as shown in the graph 

 for the same bird. The graphs are presented distinctly for the pur- 

 pose of showing at a glance the rate and extent of the change in 

 weights of the pigeons during the experiments, and not for the pur- 

 pose of indicating the survival periods of the birds. 



TESTS WITH OX MUSCLE. 



The results of the feeding tests with ox muscle are shown in Tables 

 2, 3, and 4, and the changes in the weights of the birds are shown 

 graphically in Figures 5, 6, 7, 8, 9, and 10. 



Pens 4 and 5 (Table 2) were fed rations containing 25 and 15 per 

 cent, respectively, of muscle derived from the round of the carcass 

 of a single fat steer. The slight difference in the average survival 

 periods of the two pens of birds is not material. There was prac- 



