The Construction of Mill Dams: Comprising Also the Building of Race and Reservoir Embankments and Head Gates, the Measurement of Streams, Gauging of Water Supply, &c

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J. Leffel, 1874 - 336페이지
 

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320 페이지 - QC A New, Revised, and considerably Enlarged Edition (the 6th), with very numerous Illustrations. 4s. 6d. cloth limp; 5s. 6d. cloth boards, gilt. 82. THE POWER OF WATER, as applied to drive Flour Mills, and to give motion to Turbines and other Hydrostatic Engines.
326 페이지 - EDITION. Entirely rewritten by the ablest writers on every subject. Printed from new type, and illustrated with Several Thousand Engravings and Maps. THE work originally published under the title of THE NEW...
143 페이지 - ... (the periodical wind which blows half the year in one direction and the other half in the opposite, and which in the Indian Ocean blows from the southwest from April to October, bringing heavy rains, after which it changes to the northeast for the rest of the year) was nearly ten feet lower than usual.
281 페이지 - ... subject to variation according to circumstances ; but the rule ordinarily adopted is to make the crown from 3 to 5 feet above high-water mark. The breadth of crown is still more variable, ranging in different localities from 3 feet to 12 feet or more, the latter being an exceptional figure. CHAPTER XLV. RACE AND RESERVOIR EMBANKMENTS— (Continued). The necessity of adapting the slope of an embankment, especially on the water side, to the disturbing causes which will operate upon it, and the...
312 페이지 - ... may be accurately gauged by their flow through the same notch. The reason of this is obvious, from considering that in the triangular notch, when the quantity flowing is very small, the flow is confined to a small space admitting of accurate measurement ; and that the space for the flow of water increases as the quantity to be measured increases, but still continues such as to admit of accurate measurement.
304 페이지 - ... at each end. Cut a notch in the board sufficient in depth to pass all the water to be measured, and not more than two-thirds of the width of the stream in length. The bottom of notch B in the...
320 페이지 - Translated from the fourth augmented and improved German edition, by ECKLEY B. COXE, AM, Mining Engineer. Vol.
312 페이지 - They are, however, but ill adapted for the measurement of very variable quantities of water, such as commonly occur to the engineer to be gauged in rivers and streams. If the rectangular notch is to be made wide enough to allow the water to pass in flood times, it must be so wide that for long periods, in moderately dry weather, the water flows so shallow over its crest, that its indications cannot be relied on. To remove in some degree this objection, gauges for...
122 페이지 - ... rubble" or small boulders underneath the flags. Live moss is packed between the flag stones to prevent the silt being driven through. At the foot of the dam is another row of sheet piling, similarly supported, and protected by a fir plank at top from the action of the water. Over the layer of rubble is placed a row of regular stones, laid endwise and leaning, so as to be perfectly secure from derangement by floods. In the up-stream direction from the crest of the dam is also placed a layer of...
308 페이지 - E, 5£ inches deep ; in the first or last column find the figure 5, follow the horizontal column, until the perpendicular column is reached containing ^ at the top. In the square where these two columns meet will be found (5.18) five and eighteen hundredths cubic feet ; this is the quantity of water that...

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