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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angle appear atmosphere attraction axis balance ball barrel becomes body called cause centre circle colors common consequence convex described diameter direction distance earth eclipse effect electric equal equator exactly experiment Explain fall feet figure fixed fluid force forward fulcrum give given glass gravity greater half hand heat hence illustrated inches inclined increased kind length lens less lever light machine magnetic manner matter means mercury metals miles mirror moon motion move natural object orbit parallel particles pass piece piston plane poles position pounds pressure principle produced proportion pump quantity raised rays rays of light reason reflected refracted represented respect rise rope round screw seen side sound space standing stars substances Suppose surface thrown tion tube turned velocity vessel weight wheel whole
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,...