Contents: Diet and Sex Experiment of Dr. Francis G. Benedict of the Carnegie Institute on Influence of Low Protein Diet in Controlling Sexual Tendencies and Eliminating Nocturnal Emissions Is the Sexual Impulse Due to Natural Instinct or to Food Stimulation? The Internal Secretions of the Sex Glands the Physiological Value of Seminal Conservation Professor Steinach's Researches on Rejuvenation Why Sex Hormones are Present in the External Genital Secretion and Lost With It The Physiological Resorption of Semen