Of mechanics and astronomyJ. Grigg, T. Desilver, E. Littel, Towar & Hogan, and Kimber & Sharpless, 1829 |
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Page 48
... raised to c , at which point if a weight be hung , it will be found that the line of direction falls out of the base , and therefore the body must fall . Emma . I think I now see the reason of the advice which you gave me , when we were ...
... raised to c , at which point if a weight be hung , it will be found that the line of direction falls out of the base , and therefore the body must fall . Emma . I think I now see the reason of the advice which you gave me , when we were ...
Page 54
... raised a little above the plane ; the body will roll towards the elevated end of the rulers , and appear to ascend ; the parts of the cone that rest on the rulers growing smaller as they go over a large opening , and thus letting it ...
... raised a little above the plane ; the body will roll towards the elevated end of the rulers , and appear to ascend ; the parts of the cone that rest on the rulers growing smaller as they go over a large opening , and thus letting it ...
Page 76
... raise weights , move heavy bodies , and overcome resistances , which , with- out their assistance , could not be ... raise fifty pounds to a certain distance in one minute , and if by the help of machinery , you wish to raise 500 pounds ...
... raise weights , move heavy bodies , and overcome resistances , which , with- out their assistance , could not be ... raise fifty pounds to a certain distance in one minute , and if by the help of machinery , you wish to raise 500 pounds ...
Page 77
... raised to a certain height , it may be full as convenient to elevate them one by one , as to take the advan- tage of the mechanical powers in raising them all at once . Because , as we have shown , the same time will be necessary in ...
... raised to a certain height , it may be full as convenient to elevate them one by one , as to take the advan- tage of the mechanical powers in raising them all at once . Because , as we have shown , the same time will be necessary in ...
Page 79
... raise weights , while it is sup- ported at a point by a prop or fulcrum , on which , as the centre of motion , all the other parts turn . A B ( Plate III . Fig . 17. ) will represent a lever , and the point c the fulcrum or centre of ...
... raise weights , while it is sup- ported at a point by a prop or fulcrum , on which , as the centre of motion , all the other parts turn . A B ( Plate III . Fig . 17. ) will represent a lever , and the point c the fulcrum or centre of ...
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Common terms and phrases
24 hours angle annual motion appear Aries astronomers attraction of cohesion axis body called Capricorn centre of gravity centre of motion Charles clock consequently CONVERSATION darkness days and nights degrees diameter distance diurnal motion earth earth's orbit eclipse Emma enlightened equal equator explain fall Father feet figure fixed stars force fulcrum full moon globe greater half harvest moon heat heavens hemisphere hence Herschel horizon inch inclined plane inhabitants James Julius Cæsar larger Leap-Year length less lever Libra light matter mechanical power Mercury millions of miles minutes moon's move nearer observe parallel perpendicular planets Plate VII polar circles poles pound pulleys rays revolves rise rotation round the sun satellite Saturn seasons seen shadow shine sidereal day solar summer sun and earth sun's supposed surface synodical month tance tides tion tropic tropic of Cancer tropic of Capricorn turn Tutor velocity Venus vertical visible weight winter
Popular passages
Page 177 - Amid the radiant orbs, That more than deck — that animate — the sky, The life-infusing suns of other worlds ; Lo ! from the dread immensity of space Returning, with accelerated course, The rushing comet to the Sun descends ; And as he sinks below the shading earth, With awful train projected o'er the heavens, 1710 The guilty nations tremble.
Page 161 - On earth join all ye creatures to extol Him first, him last, him midst, and without end. Fairest of stars, last in the train of night, If better thou belong not to the dawn, Sure pledge of day, that crown'st the smiling morn With thy bright circlet, praise him in thy sphere, While day arises, that sweet hour of prime.
Page 144 - Less than archangel ruined, and the excess Of glory obscured ; as when the sun, new risen, Looks through the horizontal misty air Shorn of his beams, or from behind the moon, In dim eclipse, disastrous twilight sheds On half the nations, and with fear of change Perplexes monarchs.
Page 109 - Of thirty years, to Mercury, whose disk Can scarce be caught by philosophic eye, Lost in the near effulgence of thy blaze.
Page 109 - One sun by day, by night ten thousand shine ; And light us deep into the DEITY.
Page 126 - evidence of things not seen," in the fulness of Divine grace ; and was profound on this, the greatest concern of human life, while unable even to comprehend how the " inclination of the earth's axis to the plane of its orbit" could be the cause of the change of the seasons.
Page 41 - These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.
Page 86 - To ask or search I blame thee not, for heaven Is as the book of God before thee set, Wherein to read his wondrous works, and learn His seasons, hours, or days, or months, or years.
Page 28 - If the force with which it strikes the air below it, is equal to the weight of its body, then the re-action of the air upwards is likewise equal to it, and the bird being acted upon by two equal forces in contrary directions, will rest between them. If the force of the stroke is greater than its weight, the bird will rise with the difference of these two forces ; and if the stroke be less than its weight, then it will sink with the difference.
Page 134 - But opposite in levell'd west was set His mirror, with full face borrowing her light From him, for other light she needed none In that aspect, and still that distance keeps Till night...