Produced by Chuck Greif and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images available at The Internet Archive) _This Edition consists of 84 copies, of which 75 copies are for sale._ _This is No._ TWO MEDICAL TRACTS BY J. P. MARAT, M.D. Reprint of Two Tracts 1. AN ESSAY ON GLEETS. 2. AN ENQUIRY INTO THE NATURE, CAUSE, AND CURE OF A SINGULAR DISEASE OF THE EYES. By JEAN PAUL MARAT, M.D. EDITED WITH AN INTRODUCTION BY JAMES BLAKE BAILEY LIBRARIAN OF THE ROYAL COLLEGE OF SURGEONS OF ENGLAND PRINTED FOR PRIVATE CIRCULATION ONLY BY PERCIVAL & CO. LONDON 1891 INTRODUCTION The two tracts here reprinted were written in English by Jean Paul Marat during his residence in Church Street, Soho, where he practised as a Physician. Both of the tracts are exceedingly rare. Speaking of the former one, Mr. Morse Stephens, in his article on “Marat” in the _Encyclopædia Britannica_,[1] says, “no copy is to be found.” Since the date of Mr. Stephens’s notice of Marat a copy has come to light, and is now in the possession of Dr. J. F. Payne. Of the latter tract there is only one known copy: this is in the Library of the Royal Medical and Chirurgical Society of London. I have to thank the Council of the Society and Dr. Payne for their kindness in allowing copies of the pamphlets to be made for the purpose of publication. The first tract is dedicated to the Worshipful Company of Surgeons in London, and is dated November 1775. As the type is broken the day of the month cannot be read with certainty in the copy from which this was reprinted: there is no other known copy to which reference can be made. The date is either the 21st or 24th: as regards the month and the year there is no doubt. The second tract has an address to the Royal Society, and is dated January 1st, 1776: as Marat returned to Paris in 1777 both these works were issued towards the end of his residence in London.