A letter to the Right Honourable Spencer Perceval ... on the expediency and propriety of regulating by Parliamentary authority the practice of variolous inoculation, with a view to the extermination of the small-pox.

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A letter to the Right Honourable Spencer Perceval ... on the expediency and propriety of regulating by Parliamentary authority the practice of variolous inoculation, with a view to the extermination of the small-pox. Public Domain Mark. Source: Wellcome Collection.