London's medicinal-informer : Containing, I. A brief enquiry into the ancient state of the practices of physick and surgery in the world. II. The present state of those professions in London. III. Quacks rightly distinguish'd from other practicers; characteris'd, and chastiz'd. IV. The venereal disease in its cause, nature, signes, dangerous effects; best most cheap, easy, safe, and private methods of cure, truly represented; in order to prevent peoples being ruin'd either by that disease, of by unskilful pretenders to its cure. By a London physician.