An Introduction to Natural Philosophy: Designed as a Text Book, for the Use of the Students in Yale College, Compiled from Various Authoritie[s]Collins & Brother, 1859 - 592 pages |
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Common terms and phrases
angle of incidence applied atmosphere axis axle ball beam body center of gravity colors column common center concave concave lens condensed conductor consequently convex lens curve cycloid cylinder descend diameter diminished direction distance earth effect elastic electricity electrified electrometer equal equilibrium experiments fall feet fluid focus forces acting friction given glass greater Hence horizontal inches inclined plane increased insulated iron length lever Leyden jar light machine magnet mechanical miles mirror motion move Natural Philosophy needle object opposite parallel parallelogram particles passing pendulum perpendicular piston placed plate pole pounds pressure principle produced pulley radius ratio rays Reflecting Telescope reflexion refraction represented resistance rest screw side sound space described specific gravity spherical aberration square steam string supposed surface telescope tion triangle tricity tube velocity vessel vibrations weight wheel
Popular passages
Page 503 - When one medium is a vacuum, n is the ratio of the sine of the angle of incidence to the sine of the angle of refraction. retardation, S — optical path difference between two beams in an interferometer; also known as "optical path difference
Page 339 - ... is equal to the weight of a column of water whose base is the section of the piston, and whose height is the distance of the level of the water in the barrel AC, above the level in the reservoir.
Page 281 - ... fluid, or with which it will descend, if it is heavier, is equal to the difference between its own weight and the weight of an equal quantity of the fluid.
Page 470 - That in the same plate of steel, of the size of a few square inches only, portions are found varying considerably in their capability of receiving magnetism, though not apparently differing in any other respect.
Page 535 - ... whence it follows, that the different thicknesses of the fluids at the places where the rings appeared, were nearly as 3 to 4 ; that is, in the ratio of the sine of incidence to the sine of refraction (Art. 749,) when the light passes from water into air.
Page 281 - ... to their necks, so that in their frequent falls overboard, they are not in danger. Life-boats have a large quantity of cork mixed in their structure, or of air-tight vessels of thin copper or tin plate; so that, even when the boats are filled with water, a considerable part still floats above the general surface. Swimming is much easier to quadrupeds than to man, because the ordinary motion of their legs in walking and running is that which best supports them in swimming.
Page 114 - The pulley is a small wheel, movable about its axis by means of a cord, which passes over it. When the axis of a pulley is fixed, the pulley only changes the direction of the power ; if movable pulleys are used, an equilibrium is produced, when the power is to the weight, as one to the number of ropes applied to them.
Page 139 - DB ; hence, (Art. 177,) the time of one vibration will be to the time of a body's falling freely down half the length of the pendulum, as the circumference of a circle to its diameter.
Page 45 - Thus if a body be acted upon by two forces, one of which would cause it to move uniformly over the...
Page 183 - 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...