Two sheep have been repeatedly injected with an aqueous extract of ragweed-pollen. The sera of these sheep contain an antibody which inhibits the Prausnitz-Küstner reaction to an extract of ragweed-pollen.


The immunization of the sheep was conducted by and the serum obtained through the coöperation of the Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana.

This content is only available via PDF.