Note 4 — Chapter IV · THE MINERAL CONSTITUTION OF BRICK-EARTHS.
Reading edition
Information on this subject will be found in Mr. J. H. Collins’ work, “The Hensbarrow Granite District.” Truro, 1878.
Reading edition
Information on this subject will be found in Mr. J. H. Collins’ work, “The Hensbarrow Granite District.” Truro, 1878.