The Use of Motives in Teaching Morals and Religion

Sex and Life: A Message to Undergraduate Men

The Experimental Evidence for the Inheritance of Acquired Characters in Organisms

A Case of Phosphorescence as a Mating Adaptation

An Appreciation of the Pedagogical Possibilities of the Biological Laboratory

The Use of Motives in Teaching Morals and Religion

Zoology: A Textbook for Universities, Colleges and Normal Schools

Zoology: A Textbook for Universities, Colleges and Normal Schools

Biology of Sex for Parents and Teachers

Zoology: A Textbook for Universities, Colleges and Normal Schools

First Course in Zoology: A Text-book for Secondary Schools, Normal Schools and Colleges

The Use of Motives in Teaching Morals and Religion

The Sex Factor in Human Life: A Study Outline for College Men

Biology of Sex for Parents and Teachers

Sex and Social Health: A Manual for the Study of Social Hygiene

Biology of Sex for Parents and Teachers

The Father and His Boy: The Place of Sex in Manhood Making

Love and Marriage: Normal Sex Relations, Volume 6

The Father and His Boy: The Place of Sex in Manhood Making

Parenthood and the Character Training of Children