Observations upon the reducing substances of pigeons' blood

Abstract
The average residual reducing value after glycolysis in pigeons'' blood was 73 mgm. "glucose" per 100 cc. (by the Hagedorn and Jensen method), while the normal was 230 mgm. [plus or minus] 20 mgm. Zinc filtrates did not contain aliphatic[long dash]SH compounds. There were apparently no variations between undieted and B-avitaminous birds. Ergothioneine hydrochloride was isolated from pigeons'' blood.