6 FEBRUARY 1915, Page 26

The problems of the nature and causation of sex are

among the most doubtful which confront biologists. Dr. L. Doncaster in his new volume on The Determination of Sex (Cambridge University Press, 7s. 6d. net) does not profess to offer any dogmatic solution of the difficulty, but rather gives a critical account of the present state of our knowledge. The book will be read with interest by students of biology and genetics, and is not of too technical a character for the general reader whose tastes lie in those directions.