11 JULY 1925, Page 42

We would call the attention of our readers to Mr.

David, Master's book New Cancer Facts (Bodley Head). In it he gives an account of Dr. Louis Sambon's careful investigations and his startling conclusions. Dr. Sambon believes he has traced the general cause of cancer to infection by a parasitic worm. In ordinary cases the germ would not be able to enter the cell, but the worm breaks a way for it and it settles down inside. The two chief spreaders of the parasite, he thinks, are the cockroach and the rat. We hope to be able to deal fully in a subsequent issue with the reasons for Dr. Sambon's conclusions, and to point out again the advisability of taking urgent steps to check the ravages of these pests.