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CHAPTER XXXVII.. Miscellaneous Mineral Substances Used in the Industrial Arts.

The Subterranean World · G. Hartwig — chapter 36 of 80 · ~22 words · public domain

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MISCELLANEOUS MINERAL SUBSTANCES USED IN THE INDUSTRIAL ARTS.

Alum—Alum Mines of Tolfa—Borax—The Suffioni in the Florentine Lagoons—China-clay—How formed?—Its Manufacture in Cornwall—Plumbago—Emery—Tripolite 458

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