Technology Quarterly, Volume 10 (Google eBook)

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students, 1897 - Technology
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Page iii - THE MASSACHUSETTS INSTITUTE OF TECHNOLOGY. The objects of this Society are to awaken and maintain an active interest in the practical sciences, and to aid generally in their advancement and development in connection with arts, agriculture, manufactures, and commerce.
Page 54 - The corresponding values of the relative mean cross-sections as calculated by formula (1) are 2.48. That is to say, the average cross-section of the mercury molecule or atom is very nearly the same as that of the carbon dioxide molecule, and is about 2 times as large as that of the hydrogen molecule. This last result does not differ very greatly from that (2.68) corresponding to the relative molecular volumes of mercury and hydrogen as calculated for 300 by Koch. These results indicate that atoms...
Page 113 - ... itself is determinate. This proposition leads to results of particular interest when applied to the Earth, as I showed in two papers published in 1849*, where among other things I proved that if the surface be assumed to be, in accordance with observation, of the form of an ellipsoid of revolution, Clairaut's Theorem follows independently of the adoption of the hypothesis of original fluidity, or even of that of an internal arrangement in nearly spherical strata of equal density. But though the...
Page 91 - ... two liters of alcohol in seven hours. The same result was obtained when cultures were rolled up in a mattress and the whole tied into as compact a bundle as possible. The reason of the remarkable penetrating power of the gas is undoubtedly in the fact that when hot it is of almost the same specific gravity as air, and hence, readily mixes with air and has no tendency to separate out.
Page 370 - Yucatan. Second, that the people revealed in the caves had reached the country in geologically recent times. Third, that these people, substantially the ancestors of the present Maya Indians, had not developed their culture in Yucatan, but had brought it with them from somewhere else.
Page 160 - Riegler t states that iodic acid is readily obtained in the pure state, that it may be accurately weighed out, and that a solution of it may be exactly made up to a desired strength and kept for a long time unaltered. He further states that when a solution of sodium thiosulphate is titrated with iodic acid the reaction takes place according to the equation, 6Na,S,Oj + 6HI0 3 = 3Na 2 S 4 0...
Page 423 - Contributed by Members of the Instructing Staff of the Massachusetts Institute of Technology. ARTHUR A. NOYES, Editor. HENRY P. TALBOT, Associate Editor. REVIEWERS. ANALYTICAL CHEMISTRY HP Talbot BIOLOGICAL CHEMISTRY WR Whitney CARBOHYDRATES GW Rolf'e GENERAL CHEMISTRY AA Noyes GEOLOGICAL AND MINERALOGICAL CHEMISTRY....
Page 143 - The occurrence and behavior of tellurium in gold ores, more particularly with reference to the Potsdam ores of the Black Hills, South Dakota.
Page 151 - REVIEWER. On the Permeation of Hot Platinum by Gases. BY WYATT W. RANDALL. Am. Chem. /., 19, 682-691. After giving a brief review of the previous work done on the permeation of metals by gases, the author describes the apparatus used in his own experiments. This consists of a platinum tube closed at one end, fitted into a hard-glass tube, and connected at its protruding open end with a Topler pump and a sparking tube for examining the spectrum. The hard-glass tube and the platinum tube within...
Page 85 - The sample is treated with copper ammonium chloride in the usual manner, and the separated carbon is collected on an asbestos filter, where it is washed successively with water, alcohol, and ether; it is then transferred to a Rose crucible, dried at 120, and weighed. A stream of oxygen is led into the crucible which is heated over a Bunsen flame, and the carbon is thus burned off in from three to five minutes ; the difference in weight is the "total carbon.

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