Sodium oleate, oleic acid, linolic acid, and linolenic acid injected into mice in suitable amounts induce a material increase in the resistance against subsequent transplantation of cancer grafts, although they fail to exert so marked an influence on cancer grafts already in place.

Sodium palmitate and sodium stearate, on the other hand, do not produce immunity, at least in the amounts employed in the present study.

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Copyright, 1924, by The Rockefeller Institute for Medical Research New York
1924