"Frictional" Quotes from Famous Books
 ... makes them curious, might be collected from old literature to any extent. Thus, among the sounds usually called 'rappings,' Mr. Crookes mentions, as matter within his own experience, 'a cracking like that heard when a frictional machine is at work'. Now, as may be read in Southey's Life of Wesley and in Clarke's Memoirs of the Wesleys, this was the very noise which usually heralded the arrival of 'Jeffrey,' as they called the Epworth 'spirit'. {125b} It has been alleged that the charming ...
— Cock Lane and Common-Sense • Andrew Lang
... propellers is always a fruitful source of inefficiency. With a given screw, the loss due to friction may be taken to vary approximately as the square of the speed. This is not to say that the frictional resistance is greater in proportion to the thrust at high than at low speeds. The blades of screws for any speed should be as smooth and clean as possible, but for high speed screws the absolute saving of friction ...
— Scientific American Supplement, No. 598, June 18, 1887 • Various
... the algebras, in the diagram of which a pile of three shells, resting on the base, has been omitted. It is then seen that unless the pressures at an angle of 60 deg. with the horizontal are sufficient to produce frictional resistance of a very large amount, the balls will roll and instantly break the arch action suggested by the author. Consequently, an almost infinitesimal settlement of the "centering" may cause the complete destruction of ...
— Pressure, Resistance, and Stability of Earth • J. C. Meem
... of an engine, multiply the area of the cylinder in square inches by the average effective pressure in pounds per square inch, less 3 lb. per square inch as the frictional allowance, and also by the speed of the piston in feet per minute, dividing the product by 33,000, and the quotient ...
— Getting Gold • J. C. F. Johnson
... a machine for exciting the electric power in larger quantities by simply turning a ball of sulphur between the bare hands. Improved by Sir Isaac Newton and others, who employed glass rubbed with silk, it created sparks several inches long. The ordinary frictional machine as now made is illustrated in figure i, where P is a disc of plate glass mounted on a spindle and turned by hand. Rubbers of silk R, smeared with an amalgam of mercury and tin, to increase their efficiency, press the rim of the plate between them as it revolves, and a brass conductor ...
— The Story Of Electricity • John Munro |
