ما يقوله الناس - كتابة مراجعة
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angle axis axle balance barometer barrel beam body bottom brass bucket centre centrifugal force circular circular saw circumference cistern cock column common condensation construction contrivance cord Coulomb crane crank cylinder degree descend described diameter dilatation distance effect employed engine epicycloid equal experiments extremity Fahrenheit fastened feet fixed fluid frame friction frustum groove gudgeons hole horizontal horse hygrometer inches ingenious invention iron length lever lower machine machinery manner means mercury mill motion moveable moving force nearly observed pallet passes pendulum piece pinion pipe piston piston-rod pivots placed plane plate pressure pulley pump pyrometer quantity raised ratchet-wheel rise roller rope round scapement screw shaft shew side slide space specific gravity spindle spiral steam surface teeth temperature thermometer tion tooth tube turn upper valve velocity vertical vessel vibration water-wheel weight wheel
الصفحة 55 - ... (7) The load, at a maximum, that sails of a similar figure and position will overcome, at a given distance from the centre of motion, will be as the cube of the radius.
الصفحة 558 - I have seen the water run like a constant fountain stream forty feet high. One vessel of water rarefied by fire driveth up forty of cold water ; and a man that tends the work is but to turn two cocks, that, one vessel of water being consumed, another begins to force and refill with cold water, and so successively, the fire being tended and kept constant, which the self same person may likewise abundantly perform in the interim, between the necessity of turning the said cocks.
الصفحة 553 - A way how to make a boat work itself against wind and tide, yea both without the help of man or beast ; yet so that the wind or tide, though directly opposite, shall force the ship or boat against itself; and in no point of the compass...
الصفحة 562 - ... to keep them sweet, running through several streets, and so performing the work of scavengers, as well as furnishing the inhabitants with sufficient water for their private occasions...
الصفحة 444 - ... means afforded, ex re nata, and no need of provision beforehand, though much better if foreseen, and means prepared for it, and a premeditated course taken by mutual consent of parties.
الصفحة 55 - If sails are of a similar figure and position, the number of turns in a given time will be reciprocally as the radius or length of the sail.
الصفحة xvi - Another idea we have of body, is the power of communication of motion by impulse ; and of our souls, the power of exciting motion by thought. These ideas, the one of body, the other of our minds, every day's experience clearly furnishes us with : but if here again we inquire how this is done, we are equally in the dark. For in the communication of motion by impulse, wherein as much motion is lost to one body as is got to the other, which is the...
الصفحة 555 - A way in one night's time, to raise a bulwark twenty or thirty foot high, cannon-proof, and cannon mounted upon it, with men to overlook, command, and batter a town ; for, though it contain but four pieces, they shall be able to discharge two hundred bullets each hour. 31.