PART Ⅰ:RESEARCH INTO CAUSATION 1
1．HISTORICAL ASPECTS OF CANCER＆W．R．Bett 1
2．THE INCUBATION PERIOD OF CANCER IN MAN＆E．L．Kennaway 6
3．THE CARCINOGENIC EFFECT OF CHOLESTEROL＆E．L．Kennaway 24
4．CARCINOGENESIS＆P．R．Peacock 32
5．CHEMICAL MECHANISMS O F NORMAL AND ABNORMAL CELL DIVISION＆J．N．Davidson 76
6．BIOCHEMISTRY OF CANCER INDUCTION＆A．Clark Griffin 123
7．HORMONES AND NEOPLASIA＆Michael B．Shimkin 161
8．THE PART PLAYED BY VIRUSES IN THE ORIGIN OF TUMOURS＆Leon Dmochowski 214
9．NUTRITION AND THE GENESIS OF TUMOURS＆Albert Tannenbaum and the late Herbert Silverstone 306
10．THE GENETIC COMPONENT OF CANCER＆P．C．Koller 335
11．ENVIRONMENTAL FACTORS IN THE PRODUCTION OF HUMANCANCER＆W．C．Hueper 404
12．CARCINOGENIC EFFECTS OF RADIATION＆A．Glucksmann,L．F．Lamerton and W．V．Mayneord 497