Of mechanics and astronomyJ. Grigg, T. Desilver, E. Littel, Towar & Hogan, and Kimber & Sharpless, 1829 |
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Page 40
... poles , and the distance from the centre to the poles is about eighteen or nineteen miles less than its distance from the centre to the equator , consequently , bodies ought to be something heavier at , and near the poles , than they ...
... poles , and the distance from the centre to the poles is about eighteen or nineteen miles less than its distance from the centre to the equator , consequently , bodies ought to be something heavier at , and near the poles , than they ...
Page 52
... pole , with weights at each end , across the rope on which they dance , keeping their eyes fixed on some object , parallel to the rope , by which means they know when their centre of gravity declines to 52 MECHANICS .
... pole , with weights at each end , across the rope on which they dance , keeping their eyes fixed on some object , parallel to the rope , by which means they know when their centre of gravity declines to 52 MECHANICS .
Page 53
... pole , they are enabled to keep the centre of gravity over the base , narrow as it is . It is not however rope - dancers only that pay attention to this principle , but the most common actions of the people in gene- ral are regulated by ...
... pole , they are enabled to keep the centre of gravity over the base , narrow as it is . It is not however rope - dancers only that pay attention to this principle , but the most common actions of the people in gene- ral are regulated by ...
Page 75
... poles upon which the seats were fixed ? Father . Yes , the greater the distance at which these seats were placed from the centre of mo- tion , the greater was the space which the little boys and girls travelled for their half - penny ...
... poles upon which the seats were fixed ? Father . Yes , the greater the distance at which these seats were placed from the centre of mo- tion , the greater was the space which the little boys and girls travelled for their half - penny ...
Page 87
... pole between them , the ability of each may be consulted by placing the burden as much nearer to the stronger man , as his strength is greater than that of his partner . Emma . Which would you call the prop in this case ? Father . The ...
... pole between them , the ability of each may be consulted by placing the burden as much nearer to the stronger man , as his strength is greater than that of his partner . Emma . Which would you call the prop in this case ? Father . The ...
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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...