198 Diseases of Puidtry 



nucleic acid but that it is not present in the nucleins of nucleic 

 acids that have been isolated by processes involving the use 

 of alkalies or heat." 



Treatment. — Prevention is the best treatment. This dis- 

 ease can be easily prevented by feeding a rational diet. The 

 disease may be cured by feeding rice polishings or an extract 

 made from them. It can also be cured by a dose of 30 mg. of 

 Funk's base. This is, of course, not available for therapeutic 

 purposes. 



Prognosis. — If the cause is not removed the birds die. 

 If the food is changed so that it has a sufficient supply of the 

 deficient material they recover. 



