An Introduction to Natural Philosophy: Designed as a Text-book, for the Use the of Students [i]n Yale College. Compiled from Various Authoritie[s] |
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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 elasticity 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 reflexion refracting telescopes 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, & — optical path difference between two beams in an interferometer; also known as "optical path difference
Page 216 - ... that the axle describes a small one, therefore the power is increased in the same proportion as the circumference of the wheel is greater than that of the axle. If the velocity of the wheel is...
Page 376 - The first seven letters of the alphabet, A, B, C, D, E, F, G, are...
Page 535 - Having given the radius of an arc of any colour in the secondary rainbow, find the ratio of the sine of incidence to the sine of refraction when rays of that colour pass out of air into water.
Page 381 - Nothing was ever written upon the subject of electricity, which was more generally read and admired in all parts of Europe than these Letters. There is hardly any European language into which they have not been translated; and, as if this were not sufficient to make them properly known, a translation of them has lately been made into Latin.
Page 86 - MECHANICAL POWERS, are six in number ; viz. 1 . The Lever ; 2 The Wheel and Axle ; 3. The Pulley ; 4. The Inclined Plane ; 5 The Screw; 6. The Wedge.
Page 574 - Observations. (203.) 1. The eye should be protected from all extraneous light, and should not receive any of the light which proceeds from the illuminating centre, excepting what is transmitted through or reflected from the object.
Page 521 - The intensity declines rapidly to M and slowly to N, at both of which points it vanishes. The yellow spectrum has its maximum intensity at Y, the intensity declining to zero at M and N; and the blue has its maximum intensity at B, declining to nothing at M and N. The general curve which represents the total illumination at any point will be outside these...
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 360 - The labyrinth consists of the vestibule, e, the three semi-circular canals, c, imbedded in the hard bone, and of a winding cavity, d, called the cochlea, like that of a snail shell, in which fibres, stretched across like harp-strings, constitute the lyra. The exact uses of these various parts are not yet perfectly known. The membrane of the tympanum may be pierced, and the chain of bones may be broken, without loss of hearing, f CHAPTER II.