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The eighth report of the British Empire Cancer Campaign shows important advances. The substance in tar which produces cancer has been isolated by Dr. J. W. Cook and his associates, at the Cancer Hospital, and found to be a chemically pure substance known to chemists as 1: 2: 5: 6-dibenzanthracene. This is an advance of the first magnitude toward knowledge of the causation of cancer. Experiments are progressing to find a method of freeing lubricating oils from the cancer-producing substance. This would prevent such conditions as mule spinners' cancer. Perhaps the most important result is the production by Dr. T. W. Lumsden at the Cancer Research Laboratory of the London Hospital of an antiserum. Sheep injected with human cancer cells do not acquire the disease but produce anticancer substances. When their blood is added to cultures of mouse cancer cells, these die within a few minutes, while normal
LONDON. JAMA. 1931;97(10):715. doi:10.1001/jama.1931.02730100039018