Quackery unmask'd [electronic resource] : or, reflections on the sixth edition of Mr. Martin's Treatise of the venereal disease, and its appendix; and the pamphlet call'd, The charitable surgeon, &c. Containing A Full and Plain Detection and Refutation of some gross Errors, &c. of those Authors: Interspers'd with many new and useful observations concerning the Venereal Disease; and the Method and Medicines proper for its speedy, safe, and effectual Curation. Proper Remarks on Mr. Martin's Admirable Medicine, and his Infallible Preservative. A Full and True Account of Quacks; and their Method of Practice. An Account of some Excellent Medicines, &c. Highly necessary to be read by all Venereal Patients, who would prevent their own Ruin; and by all Physicians, Surgeons, and Apothecaries, who are here Vindicated from Mr. Martin's Aspersions. By J. Spinke, Licens'd Practitioner in Physick and Surgery.