Study of Rocks: An Elementary Text-Book on Petrology (Classic Reprint) - Tapa dura

Sinopsis

Excerpt from Study of Rocks: An Elementary Text-Book on Petrology

Assistant Naturalist to the Geological Survey, for some interesting notes on his method of preparing microscopic sections of coal, and to Mr. J. B. Jordan, of the Mining Record Office, for the revision of the chapter on the preparation of microscopic sections, and for the use.of the wood-block representing the construction of his section-cutting machine.

In the classification I have to some extent deviated from the systems commonly adopted; and, in the general treatment of the different subjects, original ideas and observations are more or less plentifully interwoven with the information derived from books.

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