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 Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.