CONTENTS. CHAPTER II. Slates of Great Britain. (a) Cambrian slates ..... (b) Lower Silurian slates .... List of slate quarries in Wales . (c) Devonian slates of Cornwall, &c. . (d) Lake districts ..... (e) Scotland ...... (f) Ireland ...... CHAPTER III. Slate Bocks of the Continent. France Belgium . Germany Austria, &c. Italy Sweden and Norway CHAPTER IV. Slate Rocks of the American Continent. Slate rocks of Canada ..... Slate rocks of United States .... PART XIV. Concluding Observations. CHAPTER I. On the physical and chemical characters of Building Stones . CHAPTER II. On the selection of Building Stones, with special regard to climate and the nature of the atmosphere APPENDIX. Weights per cubic foot of British Building Stones xix TAGE 292 292 293 295 296 296 297 299 299 300 300 300 301 302 303 304 311 317