180 



THE VITAMINES 



kilos of dried yeast, according to the method described. The sub- 

 stance was obtained from the decomposition of the silver baryta 

 fraction, and possessed a crystalline structure, melting at 210 C. 

 (uncorrected). This crude vitamine fraction was a splendid thera- 



FIG. 43. PIGEON BEFORE TREATMENT 



FIG. 44. SAME PIGEON 



(CF. FIG. 43) AFTER THREE HOURS, WITH 4 MGM. 

 OF YEAST VITAMINE 



peutic agent in a great number of beriberi pigeons. As the accom- 

 panying photograph shows (fig. 41-46), the preparation cured pigeons 

 completely in a very short time (2 to 3 hours). Further data on this 

 subject will be found in the protocol appearing at the end of this chap- 

 ter, showing, in the form of a table (p. 185), the action of substances 



