A School compendium of natural and experimental philosophyA.S. Barnes, 1852 - 404 pages |
Common terms and phrases
air-pump angle aphelion apparatus appear Astronomy attraction axis axle ball battery called causes centre of gravity Ceres circle color comets communicated concave condensing conductor constellation constructed convex convex lens copper crystalline lens cylinder degree diameter direction distance earth eclipse effect elasticity electricity Electro-Magnetism Explain Fig Explain the figure fall fixed stars fluid force friction fulcrum galvanic glass heat heavenly bodies Herschel Hydrostatics hygrometer illustration inclined plane Jupiter kinds length lens lenses lever Leyden jar machine magnet mechanical powers Mercury metals mirror moon motion move needle object orbits Pallas particles pass perihelion perpendicular Philosophy piston placed plates pole pounds pressure principle produced properties proportion pulley quantity reflected reflecting telescope refracted represents retina revolve rise Saturn screw side solar specific gravity steam substances surface telescope tion tricity tube velocity Venus vessel Vesta vitreous humor voltaic voltaic pile weight wheel wire zinc
Popular passages
Page 84 - ... the angle of reflection is always equal to the angle of incidence, the image for any point can be seen only in the reflected ray prolonged.
Page 110 - Prime cheerer, Light ! Of all material beings first, and best ! Efflux divine ! Nature's resplendent robe ! Without whose vesting beauty all were wrapt In unessential gloom '; and thou, O Sun ! Soul of surrounding worlds ! in whom best seen Shines out thy Maker...
Page 167 - Venus a pea, on a circle 284 feet in diameter; the Earth also a pea, on a circle of 430 feet; Mars a rather large pin's head, on a circle of 654 feet; Juno, Ceres, Vesta, and Pallas, grains of sand, in orbits of from 1000 to 1200 feet; Jupiter a moderate-sized orange, in a circle nearly half a mile across...
Page 168 - This disregard is neither supercilious nor causeless. The constellations seem to have been almost purposely named and delineated to cause as much confusion and inconvenience as possible. Innumerable snakes twine through long and contorted areas of the heavens, where no memory can follow them ; bears, lions and fishes, large and small, northern and southern, confuse all nomenclature, &c. A better system of constellations might have been a material help as an artificial memory."!
Page 155 - They have subsequently constructed another, which will sustain 2063 pounds. It consists of a bar of soft iron, bent into the form of a horse-shoe, and wound with twenty-six strands of copper bell-wire, covered with cotton threads, each thirtyone feet long; about eighteen inches of the ends are left projecting, so that only twenty-eight feet of each actually surround the iron. The aggregate length of the coils is therefore 72d feet.
Page 31 - ... forced into the spout. where, meeting with the particle 3, it presses it upwards, and this pressure will be continued from 3 to 4, from 4 to 5, and so on, till the water in the spout has risen to a level with that in the body of the vessel. If water be...
Page 155 - ... covered with cotton threads, each thirty-one feet long : about eighteen inches of the ends are left projecting, so that only twenty-eight feet of each actually surround the iron ; the aggregate length of the coils is therefore 728 feet. Each strand is wound on a little less than an inch : in the middle of the horseshoe it forms three thicknesses of wire, and on the ends, or near the poles, it is wound so as to form six thicknesses.
Page 25 - ... time 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 126 - ... some chemical action on one of the plates, while it has no action, or a different action upon the other.
Page 168 - Of course we do not here speak of those uncouth figures and outlines of men and monsters, which are usually scribbled over celestial globes and maps, and serve, in a rude and barbarous way, to enable us to talk of groups of stars, or districts in the heavens, by names which, though absurd or puerile in their origin, have obtained a currency from which it would be difficult to dislodge them. In so far as they have really (as some have) any slight resemblance to the figures called up in imagination...