The secrets of generation : comprising the art of procreating the sexes at will, of begetting sound and vigorous infants, &c. &c. : with directions for self-management in sexual and venereal diseases / by Michael Ryan.

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The secrets of generation : comprising the art of procreating the sexes at will, of begetting sound and vigorous infants, &c. &c. : with directions for self-management in sexual and venereal diseases / by Michael Ryan. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)