Bulletin of the U.S. Department of Agriculture, Ausgaben 701-725

The Department, 1913

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Seite 20 - The cement shall be stored in such a manner as to permit easy access for proper inspection and identification of each shipment, and in a suitable weather-tight building which will protect the cement from dampness.
Seite 3 - To find the pressure in pounds per square inch of a column of water, multiply the height of the column in feet by .434. Approximately, we say that every foot elevation is equal to % Ib. pressure per square inch ; this allows for ordinary friction. To find the diameter of a pump cylinder...
Seite 20 - Portland cement is the product obtained by finely pulverizing clinker produced by calcining to incipient fusion an intimate and properly proportioned mixture of argillaceous and calcareous materials, with no additions subsequent to calcination excepting water and calcined or uncalcined gypsum.
Seite 68 - ... shall be punished by a fine of not less than twenty-five dollars ($25.00), nor more than one hundred dollars $100.00) or by imprisonment in a county jail for not less than ten days nor more than thirty days, or by both such fine and imprisonment.
Seite 33 - ... and, in smoothing off, the trowel should be drawn over the mold in such a manner as to exert a moderate pressure on the excess material. The mold should be turned over and the operation repeated.
Seite 20 - The average tensile strength in pounds per square inch of not less than three standard mortar briquettes...
Seite 20 - A pat of neat cement shall remain firm and hard, and show no signs of distortion, cracking, checking, or disintegration in the steam test for soundness.
Seite 49 - Raise the safety valves cautiously and frequently, as they are liable to become fast In their seats and useless for the purpose intended. 10.
Seite 20 - The specific gravity of cement shall not be less than 3.10. Should the test of cement as received fall below this requirement, a second test may be made upon a sample ignited at a low red heat. The loss in weight of the ignited cement shall not exceed 4 per cent.
Seite 9 - ... of the number of bales, the classification, the price or bona fide price offered, and other terms of purchase or sale, of any cotton involved in any transaction participated in by him, or to produce all books, letters, papers, or documents in his possession or under his control relating to such matter.

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