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air-waves angle angle of incidence aperture atmosphere atoms attraction axis axle ball battery body called cause center of gravity colors concave condensed conductor connected convex lens cubic currents density Describe determined diminished direction distance earth effect elastic electricity electrified equal equilibrium exerted fall feet per second flow fluids force friction gases glass heat hence Illustrate inches inclined plane increase indices of refraction inertia inversely lenses lever Leyden jar liquid magnetic mercury miles miles per hour mirror motion move Natural Philosophy number of vibrations object opposite parallel particles pass pendulum piston placed plate polarity pole pressure prism Problem produced quantity of matter rays of light refracting telescopes refraction retina rise side solid sound space specific gravity square steam string substances surface temperature tion tricity tube undulations velocity vessel voltaic wave length weight wheel wire zinc
Page 254 - Its aliment is coal, wood, charcoal, or other combustibles. It consumes none while idle. It never tires, and wants no sleep. It is not subject to malady when originally well made, and only refuses to work when worn out with age. It is equally active in all
Page 254 - hundreds of horses, it is obedient to the hand of a child. Its aliment is coal, wood, charcoal, or other combustibles. It consumes none while idle. It never tires, and wants no sleep. It is not subject to malady when originally well made, and only refuses to work when worn out with age. It is equally active in all
Page 254 - 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. ; and a small engine, in the character of a steam pony, may be seen dragging after it on a rail-road a hundred tons of merchandise, or a regiment of soldiers, with thrice the speed of our fleetest
Page 80 - the weight. Levers are of three kinds. In the first, the fulcrum is between the power and the weight. In the second, the weight is between the
Page 321 - could scarcely be more promptly informed. Then, in many cases where distance intervenes not, light can impart at once knowledge, which, by any other conceivable means, could come only tediously, or not at all. For example, when the illuminated countenance is revealing the secret
Page 130 - the next instant, all that was to be seen of him was a pair of legs sticking out of the water, the movements of which showed that he was by no means at his ease. He was picked up by help at hand, and, with his genius cooled, and schooled by the event, was conducted
Page 254 - pony, may be seen dragging after it on a rail-road a hundred tons of merchandise, or a regiment of soldiers, with thrice the speed of our fleetest horse coaches. It is
Page 253 - recording them, moreover, to tell how much work it has done, as a clock records the beats of its pendulum. It regulates the
Page 94 - AC. That is, The power is to the weight as the height of the plane to its length. If,
Elements of Machine Construction and Drawing; or, Machine Drawing ...
Biblioteca scientifica Roberto Mantovani