31 JULY 1926, Page 17

We' have received a fifth and revised edition of Professor

J. Arthur Thonisines Heredity (Murray, 21s.), which is a pannier and deeply interesting work on a very complex subject. In connexion' with ' the 'late BroWn-Sequard's rather 'ghastly experiments on epileptic guioea-pigs, we note that the author says that " altOgether apart fram convictions as to the ethical limits' of scientific inquiry, a sound biology is not likely to gain' much froth experiments the conditions of which are utterly different from 'those= oceurring in a_ state of Nature."