A Compendium of Natural Philosophy: Adapted to the Use of the General Reader and of Schools and Academies : to which is Now Added a Supplement Containing Instructions to Young Experimenters : with a Copious List of Experiments |
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acts air pump angle apparatus applied atmosphere attraction axis axle balance ball beam bodies falling center of gravity centrifugal force colors column concave condensed consequently convex convex lens cylinder depth descend Describe diameter diminished direction distance earth effect elasticity electricity electrified electrometer equal equilibrium example experiments feet figure fluid force friction fulcrum glass greater Hence horizontal inches inclined plane increased lens less lever Leyden Jar light machine magnet means mechanical advantage miles mirror move needle object opposite orifice parallel pass pendulum perpendicular pipe piston plate pole portion pressure prime conductor principle produced proportioned pulley quantity of water quicksilver rays refracting Refracting Telescope resistance rest revolve rope screw sewing needle ship side space specific gravity spherical aberration square steam steam engine suppose surface thread tion tube valve velocity vessel vibrations weight wheel wind wire
Popular passages
Page 176 - In the present perfect state of the engine it appears a thing almost endowed with intelligence. It regulates with perfect accuracy and uniformity the number of its strokes in a given time, counting or recording them, moreover, to tell how much work it has done, as a clock records the beats of its pendulum ; it regulates the quantity of steam admitted to work; the briskness of the fire; the supply of water to the boiler ; the supply of coals to the fire ; it opens and shuts its valves with absolute...
Page 334 - Reggio, sees upon the water numberless series of pilasters, arches, castles well delineated, regular columns, lofty towers, superb palaces with balconies and windows, villages and trees, plains with herds and flocks, armies of men on foot and on horseback, all passing rapidly in succession on the surface of the sea.
Page 136 - A very slight declivity suffices to give the running motion to water. Three inches per mile, in a smooth straight channel, gives a velocity of about three miles per hour. The Ganges, which gathers the waters of the Himalaya mountains, the loftiest in the world, is, at eighteen hundred miles from its mouth, only eight hundred feet above the level of the sea — that is, above twice the height of St.
Page 56 - ... the arc of a circle, of which the point of suspension is the centre. On reaching the vertical position, it will have acquired a velocity equal to that which it would have acquired by falling vertically through the versed sine of the arc...
Page 177 - ... when originally well made, and only refuses to work when worn out with age ; it is equally active in all climates, and will do work of any kind ; it is a water-pumper, a miner, a sailor, a cotton-spinner, a weaver, a blacksmith, a miller, &c.
Page 114 - These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.
Page 10 - Force is any cause which moves or tends to move a body, or which changes or tends to change its motion.
Page 13 - The weight of a body is the force it exerts in consequence of its gravity, and is measured by its mechanical effects, such as bending a spring.
Page 69 - WHEN a lever is applied to raise a weight, or to overcome a resistance, the space through which it acts at one time is small, and the work must be accomplished by a succession of short and intermitting efforts. The common lever is. therefore, used only in cases where weights are required to be raised through small spaces.
Page 371 - It is clear from these observations, that the lens will form a violet image of the sun at v, a red image at r, and images of the other colors of the spectrum at intermediate points between r and...