Production in Chickens

[摘要] 1. 1. Six hundred forty-five chickens and ten rabbits were used for precipitin-production.2. 2. Chickens were found to be excellent precipitin-producers when injected with quantities as low as 1.75 ml of a 1:9 dilution of serum-protein.3. 3. The titer of chicken-antisera changes upon standing. Tests made after nine or more days showed a marked increase over the titers secured within 24 hours after bleeding. Rabbit-antisera did not show such changes.4. 4. Titers of 1:8,096,000 were frequently secured after three series of injections, and one antiserum gave a titer of 1:32,384,000.

[学科分类] 生物科学（综合）