CHAPTER XXXI

The Permian Volcanoes of Scotland

Geographical Changes at the Close of the Carboniferous Period--Land and Inland-Seas of Permian time--General Characteristics and Nature of the Materials erupted--Structure of the several Volcanic Districts: 1. Ayrshire, Nithsdale, Annandale; 2. Basin of the Firth of Forth 53

## CHAPTER XXXII Permian Volcanoes of England

The Devonshire Centre--Eruptive Rocks of the Midland Coal-fields 94

## BOOK VIII

THE VOLCANOES OF TERTIARY TIME

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