Structural Materials in Parts of Oregon and Washington

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U.S. Government Printing Office, 1909 - Building materials - 33 pages
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Page 64 - The calculation of the comparative fineness of ground materials by means of a surface factor: Trans. Am. Ceram. Soc., vol. 7, 1905, p. 441. 79. Ashley, Harrison Everett, The testing of the raw materials of a whiteware pottery: Trans. Am. Ceram. Soc., vol. 9, 1907. 80. Zschokke, B., Investigations on the plasticity of clays: Bull. Soc. d'Encouragement, vol. 103, 1902, pp. 619-658. Baumaterialienkunde, 1902, Nos. 24, 25-26; 1903, Nos. 1-2, 3-4, 5-6. Tonindustrie-Zeitung, vol. 29, 1905, p. 1657. 81....
Page 63 - The preparation of colloidal elements: Zeitschr. angew. Chemie, vol. 21, 1908, pp. 632-639. 66. Bodeker, , Jour. Landwirtschaft, vol. 3, 1859, p. 48. 67. Wolff, , Landw. Zeitung Nord und Mitteldeutschland, Nos. 32 and 33, 1859. 68. Wood, JT, The compounds of gelatin and tannin: Jour. Soc. Chem. Ind., vol. 27, 1908, pp. 384-387. 69. Cameron, FK, and Patten, HE, The distribution of solute between water and soil. 70. Hirsch, H., Behavior of clay in salt solutions: Tonindustrie-Zeitung, vol. 28, 1904,...
Page 61 - Schreiner and Reed, Certain organic constituents of soils in relation to soil fertility: US Dept. Agr., Bur. Soils, Bull. 47, 1907, p.
Page 12 - ... of natural clays; for he apparently thought that clay could be dried and wetted repeatedly without injuriously affecting its plasticity/ or, in other words, without affecting the activity of the colloids. Ashley said further that in this supposition Grout was not in accord with practical experience. Clay used by potters has in most cases never been deprived of its natural moisture. After once being dried out at as low a temperature as 60 C., it is found to have lost noticeably in plasticity.
Page 62 - Arizona; Rubyville, Schell Creek range, and top of Grass Mountain, Ely Range, Nevada; Meadow Creek, south of Fillmore, Utah. 1883.
Page 7 - The hydrated aluminum silicate, kaolin, is the most characteristic of these. Some feldspar is usually present. The grains of these minerals may show crystal faces (especially in the case of kaolins), but more commonly they are of irregular shapes; upon most of these grains is an enveloping colloid coating. This is mainly of silicate constitution, but may consist partly of organic colloids, of iron, manganese, and aluminum hydroxides, and of hydrated silicic acid. Quartz grains, which are generally...
Page 15 - Colloids are commonly spoken of as reversible and irreversible, according to whether they will pass from sol to gel and back to sol, or whether, having passed into the gel form, they can not be reconverted to the sol. The process of passing from sol to gel is best called "coagulation," though sometimes " pectinization " is used; that of passing from gel to sol is called peptinization.
Page xxi - ... In the sandstones and shales of the Shasta series ("Myrtle formation") south and southeast of Roseburg are a number of lens-shaped masses of limestone, which Diller " has designated the Whitsett limestone lentils. They occur at intervals along the ridge and slopes extending northeast from Umpqua River nearly to the head of the north fork of Deer Creek. The limestone is a massive gray rock, and as it has yielded satisfactory lime at several localities it is probably of good quality. The southwesternmost...
Page 20 - Mayer's experiments, a less amount favors the deflocculation, or breaking up of the lumps. Thus it is the practice in the laboratory of the Bureau of Soils of the Agricultural Department (4) to 'add 10 drops of strong ammonia to a 5-gram sample of clay in 75 cubic centimeters of distilled water in order to assist in separating the clay into its finest particles preliminary to mechanical analysis. With alkaline soils ammonia hinders the deflocculation, and should therefore be omitted in dealing with...
Page 55 - Rept., vol. 6, p. 65, pl. 12, figs. 9-9c. Upper and Lower Coal Measures: Fort Scott, Olathe, Kansas City, Eudora, Lawrence, Lecompton, Topeka, Beaumont, Grand Summit, Kans. Widely distributed but moderately rare throughout the Coal Measures and base of the Permian. Abundant near base of Permian. 1903. Meekella striaticostata. Girty, US Geol. Surv., Prof. Paper No. 16, p. 350. Hermosa formation: San Juan region, Colorado. Carboniferous: Lead ville district, Colorado. A few specimens obtained at different...

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