Principles of Public Health / A Simple Text Book on Hygiene, Presenting the Principles Fundamental to the Conservation of Individual and Community Health - Thomas Dyer Tuttle

By John W. Ritchie, of the College of William and Mary in Virginia, and Joseph S. Caldwell, of the George Peabody College for Teachers, Nashville, Tennessee. Illustrated. Cloth. vi + 184 pages. List price 40 cents, mailing price 48 cents.

PRIMER OF SANITATION

By John W. Ritchie. Illustrated. Cloth. vi + 200 pages. List price 50 cents, mailing price 60 cents.

HUMAN PHYSIOLOGY

By John W. Ritchie. Illustrated in black and colors. Cloth. vi + 362 pages. List price 80 cents, mailing price 96 cents.

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