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 10
... obvious , that they would possess length , breadth , and thickness , for they could yet be seen , felt , and measured . But suppose each of these little blocks to be again divided a thousand times , it is true we could not measure them ...
... obvious , that they would possess length , breadth , and thickness , for they could yet be seen , felt , and measured . But suppose each of these little blocks to be again divided a thousand times , it is true we could not measure them ...
Page 11
... obvious , that if we break a piece of marble into two parts , these two parts may again be divided , and that the process of division may be continued until these parts are so small as not individually to be seen or felt . But as every ...
... obvious , that if we break a piece of marble into two parts , these two parts may again be divided , and that the process of division may be continued until these parts are so small as not individually to be seen or felt . But as every ...
Page 13
... obvious that the ball would continue to move longer , and go to a greater distance . Next suppose we avoid the friction of the ice , and throw the ball through the air , it would then continue in motion still longer with the same What ...
... obvious that the ball would continue to move longer , and go to a greater distance . Next suppose we avoid the friction of the ice , and throw the ball through the air , it would then continue in motion still longer with the same What ...
Page 15
... obvious to the mind of the student . Attraction of cohesion acts only at insensible distances , as when the particles of bodies apparently touch each other . Take two pieces of lead , of a round form , an inch in diame- ter , and two ...
... obvious to the mind of the student . Attraction of cohesion acts only at insensible distances , as when the particles of bodies apparently touch each other . Take two pieces of lead , of a round form , an inch in diame- ter , and two ...
Page 16
... obvious , that if the particles of matter are equally attracted to- wards the common centre , and are free to arrange themselves , no other figure could In what substances is cohesive attraction the strongest ? In what sub- stances is ...
... obvious , that if the particles of matter are equally attracted to- wards the common centre , and are free to arrange themselves , no other figure could In what substances is cohesive attraction the strongest ? In what sub- stances is ...
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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,...