Library of Useful Knowledge: Natural philosophy, Volumen3 |
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Términos y frases comunes
already altitude angle apparent ascertained astronomers axis becomes body calculated called cause centre circle consequently considerable considered continually correction corresponding course declination described determined diameter direction distance drawn earth ecliptic effect equal equator equinox evident existence explained extreme fact figure fixed force former give given greater greatest half heavens horizon important increases instance known latitude latter least length less light longitude lunar manner mean measured meridian method moon moon's motion move nature nearly necessary node object observed opposite orbit parallax parallel passing period planet pole position present produced proportion quantity radius refraction remarkable represent respect round seen side similar situated solar South sphere star sun's supposed surface tables term tion triangle true variation varies whole zenith
Pasajes populares
Página 20 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Página 157 - D'Alembert, was the Precession of the equinoxes and the Nutation of the earth's axis, according to the theory of gravitation.
Página 48 - 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.
Página 11 - The lowest and most level parts of the earth, when penetrated to a very great depth, exhibit nothing but horizontal strata composed of various substances, and containing almost all of them innumerable marine productions. Similar strata, with the same kind of productions, compose the hills even to a great height. Sometimes the shells are so numerous as to constitute the entire body of the stratum. They are almost...
Página 32 - Scotland was divided into two provinces — the one on the north, and the other on...
Página 189 - ... the squares of the periodic times are as the cubes of the distances from the common centre, the centripetal forces will be inversely as the squares of the distances.
Página 16 - ... invisible. These animals are of a great variety of shapes and sizes, and in such prodigious numbers, that, in a short time, the whole surface of the rock appears to be alive and in motion. The most common...
Página 4 - In experimental philosophy we are to look upon propositions collected by general induction from phenomena as accurately or very nearly true, notwithstanding any contrary hypotheses that may be imagined, till such time as other phenomena occur, by which they may either be made more accurate, or liable to exceptions.
Página 17 - ... mark ; but the coral sand and other broken remnants thrown up by the sea, adhere to the rock, and form a solid mass with it, as high as the common tides reach. That elevation, surpassed the future remnants, being rarely covered, lose their adhesive...
Página 16 - The most common worm is in the form of a star, with arms from four to six inches long, which are moved about with a rapid motion, in all directions, probably to catch food. Others are so sluggish, that they may be mistaken for pieces of the rock, and are generally of a dark colour, and from four to five inches long, and two or three round.
Información bibliográfica
| Título | Library of Useful Knowledge: Natural philosophy, Volumen3 Library of Useful Knowledge: Natural Philosophy, Society for the Diffusion of Useful Knowledge (Great Britain) Library of useful knowledge Volumen3 de Natural Philosophy, Society for the Diffusion of Useful Knowledge |
| Colaborador | Society for the Diffusion of Useful Knowledge (Great Britain) |
| Editor | Baldwin and Cradock, 1834 |
| Procedencia del original | Universidad de Michigan |
| Digitalizado | 4 Oct. 2007 |
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