Fruits of philosophy, or, The private companion of young married people / by Charles Knowlton, M.D. ; containing the various hypothesis of generation; structure of the female organs; menstruation; conception; remedies against barrenness and impotency; and a review of the most efficient checks to impregnation, viz: sponges, non-emission, baudruches and chemical injections.

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Fruits of philosophy, or, The private companion of young married people / by Charles Knowlton, M.D. ; containing the various hypothesis of generation; structure of the female organs; menstruation; conception; remedies against barrenness and impotency; and a review of the most efficient checks to impregnation, viz: sponges, non-emission, baudruches and chemical injections. Public Domain Mark. Source: Wellcome Collection.