Published online by Cambridge University Press: 15 May 2009
Woodhouse's experiments on the carcinogenicity of ten different fractions for the skin of mice have been analysed statistically. Two experiments separated by a considerable period of time were performed on each fraction.
A number of different measures of carcinogenicity were used. All agree in showing that
(1) The apparent carcinogenicity was greater in the 2nd series of experiments.
(2) There were significant differences in carcinogenicity. The fractions can be divided into three groups within which the carcinogenicities were about the same, viz. F H I K, B D G L E, M.
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