Of mechanics and astronomyJ. Grigg, T. Desilver, E. Littel, Towar & Hogan, and Kimber & Sharpless, 1829 |
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Página 89
... Axis , which gains power in propor- tion as the circumference of the wheel is greater . nearest to him , and then the weaker must be OF THE WHEEL AND AXIS . 91.
... Axis , which gains power in propor- tion as the circumference of the wheel is greater . nearest to him , and then the weaker must be OF THE WHEEL AND AXIS . 91.
Página 91
... Axis . Father . Well , Emma , do you understand the principle of the lever , which we discussed so much at large yesterday ? than that of the axis ; this machine may be H 2 OF THE WHEEL AND AXIS . 89.
... Axis . Father . Well , Emma , do you understand the principle of the lever , which we discussed so much at large yesterday ? than that of the axis ; this machine may be H 2 OF THE WHEEL AND AXIS . 89.
Página 92
... axis , then a single pound r , will balance a weight w , of eight pounds . Charles . Is it by an instrument of this ... axis , because the advantage gained is in propor- tion as the circumference of the wheel is greater than that of the ...
... axis , then a single pound r , will balance a weight w , of eight pounds . Charles . Is it by an instrument of this ... axis , because the advantage gained is in propor- tion as the circumference of the wheel is greater than that of the ...
Página 93
... axis ; this explains why the difficulty of drawing the water , or any other weight , in- creases as it ascends nearer the top . Charles . Then by diminishing the axis , or by increasing the length of the handle , advantage is gained ...
... axis ; this explains why the difficulty of drawing the water , or any other weight , in- creases as it ascends nearer the top . Charles . Then by diminishing the axis , or by increasing the length of the handle , advantage is gained ...
Página 94
... axis of the cage , the bird by its motion would draw it up , for as it hops from the bottom bar to the next , its momentum causes that to descend , and thus the operation is performed , both with regard to the cage , and to those large ...
... axis of the cage , the bird by its motion would draw it up , for as it hops from the bottom bar to the next , its momentum causes that to descend , and thus the operation is performed , both with regard to the cage , and to those large ...
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Termos e frases comuns
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
Passagens mais conhecidas
Página 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.
Página 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.
Página 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.
Página 109 - Of thirty years, to Mercury, whose disk Can scarce be caught by philosophic eye, Lost in the near effulgence of thy blaze.
Página 109 - One sun by day, by night ten thousand shine ; And light us deep into the DEITY.
Página 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.
Página 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.
Página 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.
Página 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.
Página 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...