Elements of Natural Philosophy: A Text-book for High Schools and AcademiesSheldon, 1880 - 457 pages |
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acid acting angle angle of incidence apparatus atmospheric pressure attraction axis axle battery boiling called centre of gravity coil concave condensation convex lens cork cylinder direction distance earth effect electricity electrified electroscope equal experiment feet flask fluid focus friction Give given glass horizontal hydrometer illustrated inches iron kilogram kinetic energy latent heat length lens lever Leyden jar light liquid luminous machine magnet melted mercury metal mirror molecules motion move needle number of vibrations particles pass pendulum piece pipe piston placed plane plate position pounds prime conductor produced properties of matter pulleys quantity rays reflected refracted represented sensible heat shown in Fig solid sound specific gravity specific heat steam string substance sulphuric sulphuric acid surface temperature tension thermometer tion tricity tube vapor velocity vertical vessel wave weight wheel wire
Popular passages
Page 117 - The pressure per unit of area exerted anywhere upon a mass of liquid is transmitted undiminished in all directions, and acts with the same force upon all surfaces, in a direction at right angles to those surfaces.
Page 31 - Every body continues in its state of rest, or of uniform motion in a straight line, unless it is compelled to change that state by forces impressed upon it.
Page 235 - Oxygen and hydrogen combine in the proportion of one volume of the former, to two of the latter, to form water.
Page 162 - The BAROSCOPE consists of a beam like that of a balance, from one extremity of which is suspended a hollow sphere of copper, and from the other extremity a solid sphere of lead. These are made to balance each other in the atmosphere. If the instrument be placed under the receiver of an air-pump and the air exhausted, the copper sphere will descend.
Page 348 - ... (however themselves heated) may be assumed to be the source of the heat against which it is desired to insulate the storage chamber. Experiment has shown that cells or small chambers of dry, dead air form the best insulator. In the proportioning of these...
Page 273 - It varies directly as the square root of the elasticity, and inversely as the square root of the density.
Page 377 - To look at anything means to place the eye in such a position that the image of the object falls on the small region of perfectly clear vision. This we may call direct vision, applying the term indirect to that exercised with the lateral parts of the retina — indeed with all except the yellow spot.