A Compendium of Natural Philosophy, Adapted to the Use of Schools ...Clark, Austin & Smith, 1858 - 456 Seiten |
Inhalt
| 194 | |
| 195 | |
| 200 | |
| 203 | |
| 209 | |
| 216 | |
| 224 | |
| 230 | |
| 83 | |
| 99 | |
| 105 | |
| 112 | |
| 117 | |
| 118 | |
| 125 | |
| 143 | |
| 156 | |
| 173 | |
| 174 | |
| 181 | |
| 185 | |
| 236 | |
| 238 | |
| 242 | |
| 303 | |
| 309 | |
| 315 | |
| 354 | |
| 365 | |
| 371 | |
| 378 | |
| 384 | |
| 392 | |
| 429 | |
Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
air pump angle apparatus applied atmosphere attraction axis axle ball beam body center of gravity centrifugal force colors column concave concave lens condensed convex lens cylinder depth descend Describe diameter diminished direction earth effect elasticity electricity electrified electrometer equal example exhibited experiments fall feet figure fluid focus force friction fulcrum glass greater Hence horizontal inches inclined plane increased instrument insulated iron less lever Leyden Jar light machine magnet magnifying means mechanical mechanical advantage metallic microscope miles mirror motion move needle north pole object opposite orifice parallel pass pendulum perpendicular pipe piston plate pole portion pressure prime conductor principle produced properties pulley quantity of water quicksilver rays refracting Refracting Telescope resistance rest screw sewing needle side sound space specific gravity spherical aberration steam surface telescope temperature thread tion tube valve vapor velocity vessel vibrations weight wheel wind wire
Beliebte Passagen
Seite 192 - 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...
Seite 193 - ... pony, may be seen dragging after it, on a rail-road, a hundred tons of merchandise, or a regiment of soldiers, with greater speed than that of our fleetest coaches. It is the king of machines, and a permanent realization of the Genii of Eastern fable, whose supernatural powers were occasionally at the command of man.
Seite 83 - As the diameter of. the axle is to the diameter of the wheel, so is the power applied to the wheel, to the weight suspended on the axle.
Seite 152 - 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.
Seite 350 - 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.
Seite 68 - When a body is thrown horizontally from any elevation, with a velocity equal to that which it would have acquired by falling from that elevation to the earth, its random is twice as great as that height. Thus, if I throw a ball from a chamber window, with a velocity which it would have acquired in falling from the window to the ground, it will fall at a distance from the foot of the building equal to twice the height of the window.
Seite 70 - Powers, are certain simple instruments, commonly employed for raising greater weights, or overcoming greater resistances, than could be effected by the natural strength without them. These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.
Seite 414 - By the side of a pendulum of a clock beating seconds, (as that of Atwood's Machine,) suspend a small ball or weight, taking care to make the distance from the point of suspension to the center of the ball, as nearly as possible equal to that of the pendulum. First, make the ball vibrate in an arc much greater than that of the pendulum, letting it off from one side at the same instant that the pendulum begins to return from that side.
Seite 10 - Philosophy, we mean by particles, the smallest parts into which a body may be supposed to be divided by mechanical means, without any reference to the different elements of which such particles may be composed. Inquiries of the latter kind belong to Chemistry ; and. in general, we recognize no distinctions among the different kinds of matter which constitute various bodies, and classes of bodies, (except what relates to the states of solid and fluid.) leaving to Chemistry all inquiries respecting...
Seite 37 - A man in a boat pulling a rope attached to a large ship, seems only to move the boat: but he really moves the ship a little, for...