( xvii ) CONTENTS. * n , Page vJF Earths and Stones '—. % Of Simple Earths, their Number and Cha- radter — — 4 Of Calcareous Earth — — ib. Barytic, or Ponderous Earth — 7 Magnefia, or Muriaric Earth — ib. Earth of Alum, or Argill — 9 Siliceous Earth — 10 Of the charadterizing Power of the fore- going Earths — — xi Scottilb, or Stronthiati Earth — 13 Jargonic Earth, or Jargonia — 14 Sidneia, or Sidney Earth — 15 Adamantine Earth — 17 Calces of Iron — — ib. Of the Formation of Stony Subftances 18 Of the diftindtive Charadters, and fyftema- tic Arrangement of Earths and Stones 23 Of the internal Properties of Minerals 42 An Idea of the Claffification ot Earths and Stones ^ Experiments on the fufible and infufible Proportions of Simple Earths —■ 49 b Tables