Abstract
Twenty-six rabbits were given injections with watery suspensions of cabbage, lettuce, carrots, potatoes, wheat, corn and oats, with their alcoholic extracts and, with a mixture of these alcoholic extracts, a pig serum to see whether the above substances contain heterophilic antigen. The immunization was not followed by increase of antisheep hemolysin. Therefore these materials do not contain heterophilic antigen of the Forssmann type.

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