A System of Natural Philosophy, in which the Principles of Mechanics, Hydrostatics, Hydraulics [etc.] are Familiarly Explained: To which are Added Questions for the Examination of the Pupils ...Robinson, Pratt & Company, 1835 |
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Page viii
... surface and mountains , 260 Saturn , Herschel , Diagram of the solar system , 218 Eclipses , 220 Lunar eclipses , 261 263 221 Solar eclipses , 264 | Tides , 266 Motions of the planets , 222 Latitude and Longitude , 268 Circular orbits ...
... surface and mountains , 260 Saturn , Herschel , Diagram of the solar system , 218 Eclipses , 220 Lunar eclipses , 261 263 221 Solar eclipses , 264 | Tides , 266 Motions of the planets , 222 Latitude and Longitude , 268 Circular orbits ...
Page 11
... surface which they cover , -a single grain being sufficient to extend over a surface of fifty square inches . The ultimate particles of matter , however widely they may be diffused , are not individually destroyed , or lost , but under ...
... surface which they cover , -a single grain being sufficient to extend over a surface of fifty square inches . The ultimate particles of matter , however widely they may be diffused , are not individually destroyed , or lost , but under ...
Page 12
... surface of the Ear.h form the soil , which nourishes the growth of plants and other vegetables ; and these , in their turn , form the nutriment of animals . Thus is there a per- petual change from death to life , and from life to death ...
... surface of the Ear.h form the soil , which nourishes the growth of plants and other vegetables ; and these , in their turn , form the nutriment of animals . Thus is there a per- petual change from death to life , and from life to death ...
Page 13
... surface of the earth , never changes its position in respect to other things on the earth . It has of itself no power to move , and would , therefore , for ever lie still , unless moved by some external force . This fact is proved by ...
... surface of the earth , never changes its position in respect to other things on the earth . It has of itself no power to move , and would , therefore , for ever lie still , unless moved by some external force . This fact is proved by ...
Page 15
... surfaces be brought together , with a slight turning pressure , they will adhere with such force that two men can hardly pull them apart by the two strings . In like manner , two pieces of plate glass , when their surfa- ces are cleaned ...
... surfaces be brought together , with a slight turning pressure , they will adhere with such force that two men can hardly pull them apart by the two strings . In like manner , two pieces of plate glass , when their surfa- ces are cleaned ...
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Common terms and phrases
air pump angle appear atmosphere attraction axis balance ball barometer barrel boat bulk called centre of gravity centrifugal force circle colors common concave mirror consequence convex lens convex mirror degrees descend diameter direction distance earth eclipse elastic electric equal equator exactly experiment Explain fig falling body feet filled fluid fulcrum glass greater heat hence hydrometer illustrated inches inclined plane increased instrument kind of lever length less machine magnetic mercury meridian metals miles moon motion move object orifice particles pass pendulum perpendicular piece pipe piston poles pounds pressure principle proportion pulley quantity of matter raised rays of light reflected reflecting telescope refracted respect retina revolution revolve rise rope round screw seen side solar space specific gravity substances sun's Suppose surface suspended telescope thrown tion tube turned upwards valve velocity vessel vibrations visual angle weight
Popular passages
Page ii - In conformity to the act of Congress of the United States, entitled, " An act for the encouragement of learning, by securing the copies of maps, charts and books, to the authors and proprietors of such copies, during the times therein mentioned ;
Page 232 - It has already been explained, that the ecliptic is the plane of the earth's orbit, and is supposed to be placed on a level with the earth's horizon, and hence, that this plane is considered the standard, by which...
Page 206 - The names of the 12 signs of the zodiac are, Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, and Pisces. The...
Page 236 - ... degrees, or one half of the Earth. If, therefore, the axis of the Earth were perpendicular to the plane of its orbit, the days and nights would...
Page 215 - Different opinions have been entertained by astronomers respecting the cause of these belts and spots. By some they have been regarded as clouds, or as openings in the atmosphere of the planet, while others imagine that they are of a more permanent...
Page 130 - ... came to prepare with all haste for a storm. The barometer had begun to fall with appalling rapidity. As yet, the oldest sailors had not perceived even a threatening in the sky, and were surprised at the extent and hurry of the preparations: but the required measures were not completed, when a more awful hurricane burst upon them than the most experienced had ever braved. Nothing could withstand it; the sails already furled and closely bound to the yards, were riven away in tatters; even the bare...
Page ii - Wilson, of the said district, hath deposited in this office the title of a book, the right whereof he claims as author and proprietor, in the words following...
Page 205 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, etc.
Page 260 - ... degrees. Did the planes of the orbits of the earth and moon coincide, there would be an eclipse of the moon at every full, for then the moon would pass exactly through the earth's shadow.
Page 197 - From this it is evident that, if the eye of the spectator is moved to another position, he will not see the red ray coming from the same drop of rain, but only the blue, and if to another position, the green, and so of all the others. But in a shower of rain, there are drops at all heights and distances, and though they perpetually change their places, in respect to the sun and the eye, as they fall, still there will be many which will be in such a position as to reflect the red rays to the. eye,...