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The oeconomy of quackery considered, in a reply to Mr. Spilsbury's pamphlet, entitled, Free thoughts on quacks and their medicines. To which is added, an answer to a surgeon's Letter to the Master, Wardens, and Court of Assistants, on their permitting aliens, apothecaries, and quacks, to encroach on the business of surgeons / [Thomas Prosser]. Public Domain Mark. Source: Wellcome Collection.