THIS Syllabus contains the Wernerian sys tem, except some partial deviations and altera tions ; the reason of which I think to explain in the course of my Lectures. The Apo- phyllite, for example, appears to me to be more qualified to the family of Zeolithe, than to the family of Fel-spar, where it is placed by Werner. To shew the difference, between the Wernerian system in the year 1795, in which the Catalogue of the Leskean Museum was O published in Germany, and the newest system of 1810, I marked the Minerals known at that time mth Italic letter's ; the Minerals since dis covered or determined, are printed mth Roman letters. x