1. Human sebum, as a vehicle for methylcholanthrene, is similar to lard filtrate.

  2. Sebaceous substances from different animal species seem to differ in relation to carcinogenesis.

  3. The nature of the anticarcinogenic action of lanolin, so far, is unexplained.

*

This investigation was aided by grants from the D. Palumbo Fund, and the Stella Hirshey Fund. With the technical assistance of Miss Katie Cobbs.

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