Show science produces produce tumor with mice experiments doctors do not know the cause of cancer but scientists have pro deuced tumors by rubbing mice with i certain coal tar substances and synthetic chemicals the great research problem now is to grow tumors in mice with extracts from human cancer victims recently dr john frederick menke of stanford n university hospital anno announced lince that he had injected mice with fat soluble essences from human breast cancers for the first time in cancer history he claimed two of the mice had grown tumors I 1 meantime dr paul eby steiner of the university of chicago was working on ii a different track tracks since human bile salts are close chemical relatives of the cancer producing synthetics he concentrated on the liver he announced an extract has been prepared from the livers of persons who died of cancer which on injection into mice produced sarcomas sar comas cancers at the site of the injection dr sterner steiner procured aver over 20 pounds of livers from pers persons bris who had died from cancer of the stomach lung esophagus pancreas rectum atu all the livers were perfectly normal he ground them extracted the tat fat dried the residue reside e to a flaky brown material in june 1939 he injected a solution of the powder into 56 mice re he suits to date 1 36 mice have died of various diseases 2 seven are still alive and healthy 3 1113 13 tu mors have appeared to check this experiment dr steiner made a like preparation from the livers of persons who had died from a variety of diseases other than cancer injected the extract into 63 mice no tumors appeared |