THE GROWTH OF COAL.

DEDICATED TO THE MEMORY OF DR. SCHIMPER, OF STRASBURG, The Author of "La Flore du Monde Primitif," and many other Contributions to Fossil Botany, and of DR. H. R. GOEPPERT, whose Essay on the Structure and Formation of Coal was One of my first Guides in its Study.

Questions of Growth and Driftage—Testimony of a Block of Coal under the Microscope—Different Kinds of Coal—Conditions Necessary to Accumulation in Situ—Coal Beds and their Accompaniments—Underclays and Roofs—Vegetable Remains—History of Coal Groups—Summary of Evidence—Subsidence of Coal Areas—Stigmaria and other Coal Plants—Later Coal Accumulations—The Story and Uses of Coal

Part of a Coal Group, at the South Joggins, with underclays and erect trees and Calamites (p. 238).