. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 3S0 THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. f November. seciirilv of tlie rail, lessening tlie attrition, and being constructed willi us little or less metal than the supports generally used. It will be admitted according to tlieory and practice, by a perfect cylinder rolling on a perfectly horizontal plane, the weight of the cylinder is received in vertical pressure on the surface of the plane. But as the wheels used on railways are not portions of cylinders but are porti
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 3S0 THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. f November. seciirilv of tlie rail, lessening tlie attrition, and being constructed willi us little or less metal than the supports generally used. It will be admitted according to tlieory and practice, by a perfect cylinder rolling on a perfectly horizontal plane, the weight of the cylinder is received in vertical pressure on the surface of the plane. But as the wheels used on railways are not portions of cylinders but are portions or frustra of two cones with their bases opposite, formed by an axle (whose centre is the axis of the cones) at the distance of the gauge of the rails; allliough the surface of the rails should be perfect planes, the pressure or weight and force of the •vehicles, and their contents transmitted from the surface of the wheels on to the rails, will not be vertical but at right angles to the head or surface of the wheels (which are portions of two cones), consequently the resistance to the force from the wheels ought to be in the direction the force is received from the surface of the wheels, and the strength and support for the wheels of railway carriages ought to be laterally as well as vertically. In the common intermediately supported rail, this is endeavoured to be obtained laterally by the flange of the rail, and vertically by the depth of the rail, assisted a little by placing the chairs declining a little in- wards, but which is entirely at the mercy of the workmen employed to lay the rails. Fig. 5. Fig. I. ri!,' Fig- 3. ) Fi^'. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original London : [William Laxton]
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Keywords: ., boo, bookcentury1800, booksubjectarchitecture, booksubjectscience
