A treatise concerning the small-pox. [electronic resource] : In which a plain and easy method of curing that disease under its most direful symptoms, is discover'd. And The Case of Women with Child at that Time particularly consider'd; and so stated, as to be render'd even safer than that of other Women. The whole made apparent from Reason, and the Natural Disposition of the Parts: Exemplified by several Instances of Fact. In a letter, written in the year 1716, to the learned Dr. John Bateman, then President of the Royal College of Physicians, by F. Bellinger, Of the College of Physicians.