This is a recent historical study and may be a very substantial contribution to the study of decadence.

Alcoholism. (1906.) By W. C. Sullivan.

This little book of Dr. Sullivan's contains a useful and scrupulously moderate chapter on the relation of alcohol to human degeneration.

The Drink Problem. (1907.) By Fourteen Medical Authorities.

The Children of the Nation. (1906.) By Sir John Gorst.

Infant Mortality. (1906.) By George Newman.

The Hygiene of Mind. (1906.) By T. S. Clouston.

Diseases of Occupation. (1908.) By Sir T. Oliver.

The Prevention of Tuberculosis. (1908.) By A. Newsholme.

These volumes all deal in part with questions of racial poisoning and racial hygiene.