The nature of inoculation explained, [electronic resource] : and Its Merits Stated; in an essay, intended to supply what appeared still wanting to clear up that subject. And wherein The Nature of the Difference, between Inoculation and the Natural Small-Pox, is fully shewn; all Extremes in Opinion or Practice are avoided; and the true Use and best Manner of Preparation, from a Knowledge and Experience therein, of an earlier Date than what any, who have written on the Subject, pretend to, are declared; with a View to the general Good. To which is added, an appendix, containing Some Thoughts on the first Appearance of the Small-Pox in the World, and an Address to Inoculators and Others.