Excerpt from Gypsum Products: Their Preparation and Uses

In response to requests from the public, received by bureaus of the Department of the Interior, for information about the method of making gypsum plaster, the writer has prepared the general description given in this paper, which is based on various published reports, including the bulletin on gypsum and salt in Oklahoma, by the Oklahoma Geological Survey, 6 the volume on gypsum in Canada by the Mines Branch, Department of Mines, Canada} and on the writer's knowledge of the subject from observation in gypsum quarries, mines, and mills. Furthermore, the manuscript. Received in June, 1916, careful reading and criticism by engineers of the largest producers of gypsum products in the United States, by the manager of a company operating in several States, and by the president of a small gypsum company. Therefore, the information presented may be considered up to date and in accordance with general practice. The paper is published by the Bureau of Mines as one of a series of reports on mineral technology.

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