Minutes of Proceedings of the Institution of Civil Engineers, Volume 142

Front Cover
The Institution, 1900 - Civil engineering
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Page 416 - The chemical analysis of the coal should be made only by an expert chemist. The total heat of combustion computed from the results of the ultimate analysis may be obtained by the use of Dulong's formula (with constants modified by recent determinations), viz., 14,600 C -f 62,OOOlH - —I -f 4COO S, in which C, H, O, and S...
Page 208 - Institution shall be considered the property thereof, unless there shall have been some previous arrangement to the contrary, and the Council may publish the same, in any way and at any time they may think proper. But should the Council refuse, or delay the publication of such Paper, beyond a reasonable time, the Author thereof shall have a right to copy the same, and to publish it as he may think fit, having previously given notice, in writing, to the Secretary of his intention. No person shall...
Page 263 - ... with an elongation of not less than 25 per cent, measured on the Standard test piece В or 30 per cent, measured on the Standard test piece 0.
Page 508 - Hatt at the annual meeting, 1902, and shows the values of the tensile coefficient of elasticity of concrete bars. TABLE V. The size of the specimens was 4x4 inches square, and the elongations were measured on a length of 17^ inches, although the specimens were about 30 inches long.
Page 208 - Society, unless there shall have been any previous engagement with its author to the contrary ; and the Council may publish the same in any way and at any time that they may think proper. But should the Council refuse or...
Page 417 - Loss due to unconsumed hydrogen and hydrocarbons, to heating the moisture in the air, to radiation, and unaccounted for. (Some of these losses may be separately itemized if data are obtained from which they may be calculated.) Totals . . * The weight of gas per pound of carbon burned may be calculated from the gas analyses as follows: Dry gas per pound carbon = — — - , in which CO,, CO, O, and N are the percentages by volume of the several gases.
Page 149 - ARMSTRONG moved for a committee to inquire into certain surveys said to be made on Lake St. Peter. He said he understood that besides the report of the committee appointed by the Board of Trade to enquire into the works on Lake St. Peter, another report had been presented to the Board of Trade by Capt. Boxer and five other gentlemen, which he understood was to be suppressed. Mr. Cayley said that he thought that the hon. member had made use of a very uncalled for expression as to the suppression of...
Page 416 - ... radiation, of the amount of infiltration of air through the setting, and (by condensation of all the steam made by the boiler) of the total heat imparted to the water. As these determinations are rarely undertaken, it is not deemed advisable to give directions for making them. XXI. Calculations of Efficiency — Two methods of defining and calculating the efficiency of a boiler are recommended. They are: 1.
Page 417 - X [(212 - 0 + 966 + 0.48 (T - 212)] ( t = temperature of air in the boiler-room, T = that of the flue gases). 3. Loss due to moisture formed by the burning of hydrogen - per cent of hydrogen to combustible -f- 100 X 9 X [(212 - t) + 966 + 0.48 (T - 212)].
Page 415 - ... just beyond the outlet from the separator. The drip from the separator should be caught and weighed, and the percentage of moisture computed therefrom added to that shown by the calorimeter. Superheating should be determined by means of a thermometer placed in a...

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