Spons' Dictionary of Engineering, Civil, Mechanical, Military, and Naval; with Technical Terms in French, German, Italian, and Spanish, Volume 2E. & F.N. Spon, 1874 |
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Common terms and phrases
acid adjustment ammonia angle angle of repose antimony arch ashlar bottom cable carriage carried cast-iron centre condenser connected consists construction copper counterforts culvert cupel curve cutters cutting cylinder depth diameter direction distance embankment employed engine equal filter flues frame furnace gradient ground gutta-percha heat hemp horizontal hydrochloric acid inch inclined instrument insulator iron laid length lever litharge machine masonry material means metal method necessary obtained operation ordinary passing pipe piston placed plane plate portion pressure pulley pump purlins purpose quantity rafter railway reciprocating saws reservoir resistance ribs river rivets road roof rope screw sextant shaft shown in Fig side silver slope SPAN steam stone strain strands stratum struts sufficient surface temperature theodolite thickness tons truss tunnel tuyeres usually velocity ventilation vertical wall weight wheel width wire yarns zinc
Popular passages
Page 2731 - French authors, viz., that there ought to be no practically appreciable tension at any point of the masonry, whether at the outer face when the reservoir is empty, or at the inner face when the reservoir is full. Experience has shown that in structures of brickwork and masonry that are exposed to the overturning action of forces which fluctuate in amount and direction...
Page 2977 - ... box, to single minutes Upon the other side are marked the number of links to be deducted from each chain, for various angles of inclination, in order to reduce the distances, as measured along ground rising or falling at these angles, to the corresponding horizontal distances.
Page 2771 - On some roads the boards have been spiked to the sills ; but this is, at present, regarded as unnecessary, the stability of the boards being best secured by well packing the earth between and around the sills, so as to present, with them, a uniform bearing surface to the boards, and by adopting the usual precautions for keeping the subsoil well drained, and preventing any accumulation of rainwater on the surface. The boards for...
Page 2771 - ... inches beyond those next to them, for the purpose of presenting a short shoulder to the wheels of vehicles, to facilitate their coming upon the plank surface, when from any cause they may have turned aside. On some roads the boards have been spiked to the sills ; but this is...
Page 2783 - ... commence to form. It is recommended by some that when fresh material is added, the surface on which it is spread should be broken with a pick to the depth of half an inch to an inch, and the fresh material be well settled by ramming, a small quantity of clean sand being added to make the stone pack better. When not daily repaired by persons whose sole business it is to keep the road in good order, general repairs should be made in the months of October and April, by removing all accumulations...
Page 2773 - Now, at first sight, it would appear that, under such circumstances, a perfectly straight line drawn from one town to the other would be the best that could be chosen.
Page 2758 - As soon as the work is staked, the muck ditch most be filled in again, with buckshot earth or clay obtained from without the base of the levee, and the earth tamped in by horses or mules, ridden rapidly back and forward constantly while the earth is being...
Page 2775 - Upon hard macadamized, and upon paved roads, the traction increases with the velocity : the increments of traction being directly proportional to the increments of velocity above the velocity 3-28 feet per second, or about 2£ miles per hour.
Page 2981 - L ; nn or the defect of a division upon the vernier from a division upon the limb is equal to the nth part of a division upon the limb, n being the number of divisions upon the vernier *. * If...
Page 2775 - At a walking pace, the resistance to traction is the same, under the same circumstances, for carriages with springs and for carriages without springs.