THE VITAMINES IN THE ANIMAL KINGDOM 



97 



"beriberi, namely, white rice, that it would lack nothing but B-vita- 

 mine, although we were able to induce a typical beriberi with a syn- 

 thetic diet lacking vitamine A (275) . As we have already pointed out 

 in the case of the chicken, all these dietary deficiencies can complicate 

 the picture of experimental beriberi unnecessarily. Because of the 



FIG. 12. GROWTH CURVES OF SQUABS 



Parents were fed on a diet limited to the corn and wheat kernel, supple- 

 mented by the addition of calcium carbonate (oyster shells) (Voegtlin-Myers). 



protein deficiency of white rice, Butcher (276), and others, used an 

 addition of 3 per cent casein, calculated on the dry weight of rice. 



Pigeon beriberi. The method most commonly used to induce beri- 

 beri in pigeons is to feed white rice, although other foodstuffs and 

 mixtures of isolated substances are available for that purpose. 



