Of mechanics and astronomyJ. Grigg, T. Desilver, E. Littel, Towar & Hogan, and Kimber & Sharpless, 1829 |
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Page 69
... heavenly bodies , the moon for instance , which is impelled by two forces , performs her motion in a circular curve round the earth , and not in a diagonal between the direction of the projectile force and that of the attraction of ...
... heavenly bodies , the moon for instance , which is impelled by two forces , performs her motion in a circular curve round the earth , and not in a diagonal between the direction of the projectile force and that of the attraction of ...
Page 117
... heavens that I ever saw . James . It is uncommonly clear , and the long- er I keep my eyes fixed upwards , the more stars seem to appear : how is it possible to number these stars ? and yet I have heard that they are numbered , and even ...
... heavens that I ever saw . James . It is uncommonly clear , and the long- er I keep my eyes fixed upwards , the more stars seem to appear : how is it possible to number these stars ? and yet I have heard that they are numbered , and even ...
Page 118
... heavens ? I should suppose there were millions . Tutor . This number is certainly the limit of what you can at present behold ; and that which leads you , and persons in general , to conjecture that the number is so much larger , is ...
... heavens ? I should suppose there were millions . Tutor . This number is certainly the limit of what you can at present behold ; and that which leads you , and persons in general , to conjecture that the number is so much larger , is ...
Page 119
... heavens . Tutor . You know that we see objects only by means of the rays of light which proceed from them in every direction . And you must for the present , give me credit when I tell you that the distance of the fixed stars from us is ...
... heavens . Tutor . You know that we see objects only by means of the rays of light which proceed from them in every direction . And you must for the present , give me credit when I tell you that the distance of the fixed stars from us is ...
Page 120
... heaven Is as the book of God before thee set , Wherein to read his wond'rous works , and learn His seasons , hours , or days , or months , or years . MILTON . I will show you two experiments which will go a good way to remove the ...
... heaven Is as the book of God before thee set , Wherein to read his wond'rous works , and learn His seasons , hours , or days , or months , or years . MILTON . I will show you two experiments which will go a good way to remove 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...