A Letter to Sir Henry Halford, bart : proposing a method of inoculating the small-pox which deprives it of all its danger, but preserves all its power of preventing a second attack / by R. Ferguson.

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A Letter to Sir Henry Halford, bart : proposing a method of inoculating the small-pox which deprives it of all its danger, but preserves all its power of preventing a second attack / by R. Ferguson. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.