THe Printer not being acquainted with the Island, wherein the Copy of this Discourse was written, nor with the marks of Reference frequently used in it, was forced to guess at many interlined and imperfectly obliterated words and sentences, as also at the true places of many of them. Wherefore he desires the Reader to excuse the literal Errata and mis-pointings; and as for others, (if any seem to be) to enquire of Dr Petty himself, for his own sence and direction concerning them.