Mar. xo, 1923 
Growth-Promoting Substance by Azotobacter 
829 
EXPERIMENTS WITH PIGEONS 
The curative effect of Azotobacter upon pigeons affected with poly¬ 
neuritis was noted. A pen of pigeons was started on a feed of polished 
rice and water July 14. When pronounced symptoms of polyneuritis 
were observed, the sick pigeon was fed by hand, portions of the dried 
Azotobacter. The treated birds were left on the rice diet throughout 
the experiment. The record of observation follows: 
Pigeon 3743 showed symptoms of polyneuritis on July 25. It grew 
daily worse and upon July 28 was exceedingly lame and unable to stand 
