Scientific Dialogues: Intended for the Instruction and Entertainment of Young People: in which the First Principles of Natural and Experimental Philosophy are Fully Explained, Volume 1J. Grigg, T. Desilver, 1829 - Science |
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Page 28
... ball of light wood be dipped in oil , and then put into water , the water will recede so as to form a small channel around the ball . Charles . Why do cane , steel , and many other things bear to be bent without breaking , and when set ...
... ball of light wood be dipped in oil , and then put into water , the water will recede so as to form a small channel around the ball . Charles . Why do cane , steel , and many other things bear to be bent without breaking , and when set ...
Page 31
... ball , fired from a cannon , pass through 800 feet in a second of time ; and in the same time your brother's arrow pass through 100 feet only , how much swifter does the can- non ball fly than the arrow ? Emma . Eight times swifter ...
... ball , fired from a cannon , pass through 800 feet in a second of time ; and in the same time your brother's arrow pass through 100 feet only , how much swifter does the can- non ball fly than the arrow ? Emma . Eight times swifter ...
Page 33
... weight to sustain , in the other , the weight must be multiplied into the velocity , or , to speak in a popular manner , into the distance of the height from which it fell . If a ball a ( Plate 1. Fig . 6. ATTRACTION OF GRAVITATION . 33.
... weight to sustain , in the other , the weight must be multiplied into the velocity , or , to speak in a popular manner , into the distance of the height from which it fell . If a ball a ( Plate 1. Fig . 6. ATTRACTION OF GRAVITATION . 33.
Page 34
... ball a ( Plate 1. Fig . 6. ) lean against the obstacle b , it will not be able to overturn it , but if it be taken up to c and suffered to roll down the inclined plane AB against b , it will certainly overthrow it ; -in the former case ...
... ball a ( Plate 1. Fig . 6. ) lean against the obstacle b , it will not be able to overturn it , but if it be taken up to c and suffered to roll down the inclined plane AB against b , it will certainly overthrow it ; -in the former case ...
Page 35
... ball must pass over in a second of time , in order that the mo- menta of the battering ram and the ball may be equal , or in other words , that they may have the same effect in beating down an enemy's wall . Emma . I now fully ...
... ball must pass over in a second of time , in order that the mo- menta of the battering ram and the ball may be equal , or in other words , that they may have the same effect in beating down an enemy's wall . Emma . I now fully ...
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Common terms and phrases
advantage gained angle appear astronomers attraction of cohesion attraction of gravitation axis ball body called centre of gravity centre of motion Charles clock consequently CONVERSATION days and nights degrees diameter distance diurnal motion earth ecliptic Emma Ephemeris equal equator explain fall Father feet fixed stars force fulcrum full moon globe greater half heat heavens hemisphere hence Herschel horizon inch inclined plane James journey Jupiter kind law of motion length less lever light line of direction marble Mars matter means mechanical power Mercury millions of miles minutes moon's move nearer observe orbit papa perpendicular philosophy planets polar circles poles pound pound weight principle proportion pulleys rays reason retrograde motion revolves rise rotation round the sun Saturn screw seen sidereal day Solar System space passed sun's superior planets suppose surface tides tion turn Tutor velocity Venus visible wedge weight
Popular passages
Page 223 - 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 206 - 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 75 - Powers, are certain simple instruments, commonly employed for raising greater weights, or overcoming greater resistances, than could be effected by the natural strength without them. 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 250 - When even at last the solemn hour shall come, And wing my mystic flight to future worlds, I cheerful will obey; there, with new powers, Will rising wonders sing. I cannot go Where universal love not smiles around, Sustaining all yon orbs, and all their suns; From seeming evil still educing good, And better thence again, and better still, In infinite progression.
Page 120 - 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 188 - 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 239 - 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, The guilty nations tremble.
Page 198 - Were slunk, all but the wakeful nightingale ; She all night long her amorous descant sung; Silence was pleas'd: now glow'd the firmament With living sapphires; Hesperus, that led The starry host, rode brightest, till the moon Rising in clouded majesty, at length Apparent queen unveil'd her peerless light, And o'er the dark her silver mantle threw.
Page 60 - It is a law of nature, with respect to matter, that every motion and change of motion is proportional to the force impressed, and in the direction of that force.
Page 196 - 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...