Acetylene Gas, Its Nature, Properties and Uses: Also Calcium Carbide, Its Composition, Properties and Method of Manufacture

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author, 1898 - 88 pages
 

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Page 49 - The metal is a combination of copper and zinc, the best admixture being found to be 60 per cent, of the former, and 40 per cent, of the latter. The...
Page 80 - ... one degree Fahrenheit is called a British thermal unit. Instead of writing out the words British thermal unit in full, it is customary to abbreviate them to BTU Thus, 7 pounds of water raised 15 F. would equal 7 X 15 = 105 BTU The unit of heat used here will be the BTU 1129. The Thermal Unit. The amount of heat necessary to raise one pound of water 1 C. is called a thermal unit. Since 1 C. = | X 1 F., it follows that the thermal unit is - times as large as a BTU Hence, to change...
Page 25 - Carolina, while experimenting with an electric furnace with a view to obtaining the metal Calcium by the reduction of its oxide in the electric arc...
Page 40 - ... to the liquid, and the solution was allowed to stand until the fine haze of sulphur particles which separated from the hypo- sulphite had finished forming. When the haze had completely formed, a third reading with the " fog " cell interposed was taken on the photometer, and from the three results, it was possible to deduce the amount of light absorption due to the haze, as apart from the absorption of the cell and its liquid contents, the actual results being as follows : Percentage of loss...
Page 39 - O1075 grin, of sodium hyposulphite to the litre. The illuminating power of the light source to be tested was first read on the photometer in the ordinary way, and the cell containing the clear liquid was then interposed half-way between the source of light and the screen, and a second reading was taken, the difference between the two giving the light cut off by the cell and the liquid which it contained ; '05...
Page 48 - The element calcium is never found in the free state, but always in combination with one or more other elements.
Page 28 - Acetylene would flow through a given sized aperture in a given time than would be the case with coal gas.
Page 39 - ... of hydrochloric acid per litre was then added to the liquid, and the solution was allowed to stand until the fine haze of sulphur particles, which separated from the hyposulphite, had finished forming ; experiments showing that this took some time, but that, owing to the extremely fine state of division of the particles, the haze would remain constant, when once formed, over a very long period. When the haze had completely formed, a third reading with the
Page 29 - ... that quantity, and when the gas is purified, practically no sulphuretted or phosphoretted hydrogen or other deleterious products of combustion. Acetylene and oxygen ignite at a temperature of about 480 C, and the temperature of the flame is about 1,000 C. The maximum degree of heat is developed when Acetylene is burned with an equal volume of oxygen, the temperature of combustion then being about 3,800 C. M.

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