The Literary and Scientific Class Book: Embracing the Leading Facts and Principles of Science. Illustrated by Engravings, with Many Difficult Words Explained at the Heads of the Lessons, and Questions Annexed for Examination; Designed as Exercises for the Reading and Study of the Higher Classes in Common Schools. Selected from the Rev. John Platts' Literary and Scientific Class Book, and from Verious Other Sources, and Adapted to the Wants and Condition of Youth in the United States |
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Page 39
... heat and contracted by cold ; clocks therefore will go faster in winter , and slower in summer , for the longer a pendulum is , the slower are its vibrations . The common remedy for this inconvenience is raising or lowering the weight ...
... heat and contracted by cold ; clocks therefore will go faster in winter , and slower in summer , for the longer a pendulum is , the slower are its vibrations . The common remedy for this inconvenience is raising or lowering the weight ...
Page 70
... heat there is to the common heat of the sun , as the surface of the glass is to the surface of the focus . If a lens four inches in diameter collect the sun's rays into a focus at the distance of twelve inches , the image will not be ...
... heat there is to the common heat of the sun , as the surface of the glass is to the surface of the focus . If a lens four inches in diameter collect the sun's rays into a focus at the distance of twelve inches , the image will not be ...
Page 71
... heat of the sun and the heat of the focus of a double convex lens ? 4. Describe the burning glass formed at London . 5. What ex- amples are given of images of objects being inverted by a convex lens ? 6. How may a camera obscura be made ...
... heat of the sun and the heat of the focus of a double convex lens ? 4. Describe the burning glass formed at London . 5. What ex- amples are given of images of objects being inverted by a convex lens ? 6. How may a camera obscura be made ...
Page 94
... heat which maintains the productive power of nature , and makes the earth a fit habitation for man . The figure of the sun is a spheroid , higher under the equator than about the poles ; and his diameter is computed to be nearly nine ...
... heat which maintains the productive power of nature , and makes the earth a fit habitation for man . The figure of the sun is a spheroid , higher under the equator than about the poles ; and his diameter is computed to be nearly nine ...
Page 95
... heat from the sun ? ( see Appendix . ) 8. What rule is given ? 9. What is said of the attraction of bodies ? 10. What is the rule for finding the distances of the planets from the sun ? 11. What was ascertained by Kepler ? 12. What is ...
... heat from the sun ? ( see Appendix . ) 8. What rule is given ? 9. What is said of the attraction of bodies ? 10. What is the rule for finding the distances of the planets from the sun ? 11. What was ascertained by Kepler ? 12. What is ...
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Common terms and phrases
acid angle animals apparent magnitude appear astronomers atmospheric air attraction axis beauty called caloric celestial equator centre colours combined combustion comets conductor convex convex lens copper dark degree Describe diameter distance diurnal motion earth eclipse elasticity electricity equal equator fall fixed flowers fluid focus force glass gold gravity heat heavens hundred hydrogen inches insects iron Jupiter kind lens LESSON Linnĉus magnet mercury meridian metals microscope miles minerals minutes moon motion naked eye nature Newtonian telescope night object orbit oxyd oxygen particles pass philosophy piece pistils piston planets plates poles produced QUESTIONS.-1 rays of light reflected refraction retina revolve round round the sun salts Saturn side sidereal day solar solid sonorous body sound species specific gravities stamens stars substances sulphur sulphuric acid sun's surface telescope tion tube Uranus valve vapour vegetable vessel vibrations weight
Popular passages
Page 272 - TO him who in the love of nature holds Communion with her visible forms, she speaks A various language; for his gayer hours She has a voice of gladness, and a smile And eloquence of beauty, and she glides Into his darker musings, with a mild And healing sympathy, that steals away Their sharpness, ere he is aware.
Page 272 - A man of a polite imagination is let into a great many pleasures that the vulgar are not capable of receiving. He can converse with a picture, and find an agreeable companion in a statue. He meets with a secret refreshment in a description, and often feels a greater satisfaction in the prospect of fields and meadows, than another does in the possession.
Page 274 - THESE, as they change, ALMIGHTY FATHER, these Are but the varied God. The rolling year Is full of THEE. Forth in the pleasing Spring THY beauty walks, THY tenderness and love. Wide flush the fields ; the softening air is balm ; Echo the mountains round ; the forest smiles ; And every sense, and every heart is joy. Then comes THY glory in the Summer months, With light and heat refulgent. Then THY sun...
Page 77 - O'er mountain, tower, and town, Or, mirrored in the ocean vast, A thousand fathoms down ! As fresh in yon horizon dark, As young thy beauties seem. As when the eagle from the ark First sported in thy beam. For, faithful to its sacred page, Heaven still rebuilds thy span • Nor lets the type grow pale with age That first spoke peace to man.
Page 76 - And yet, fair bow, no fabling dreams, But words of the Most High, Have told why first thy robe of beams Was woven in the sky.
Page 20 - The world is full of poetry — the air Is living with its spirit ; and the waves Dance to the music of its melodies, And sparkle in its brightness. Earth is veiled, And mantled with its beauty; and the walls That close the universe with crystal in, Are eloquent with voices, that proclaim The unseen glories of immensity, In harmonies, too perfect, and too high, For aught but beings of celestial mould, And speak to man in one eternal hymn, Unfading beauty, and unyielding power.
Page 55 - ... stupendous alike for its force and its flexibility, — for the prodigious power which it can exert, and the ease, and precision, and ductility, with which it can be varied, distributed, and applied. The trunk of an elephant, that can pick up a pin, or rend an oak, is as nothing to it.
Page 121 - Day, too, hath many a star To grace his gorgeous reign, as bright as they : Through the blue fields afar, Unseen, they follow in his flaming way : Many a bright lingerer, as the eve grows dim, Tells what a radiant troop arose and set with him.
Page 251 - As beasts excel cold rocks and brambles rude ; Men, who their duties know, But know their rights, and, knowing, dare maintain...
Page 122 - ... gaze, And steers, undoubting, to the friendly coast ; And they who stray in perilous wastes, by night, Are glad when thou dost shine to guide their footsteps right. And, therefore, bards of old, Sages, and hermits of the solemn wood, Did in thy beams behold A beauteous type of that unchanging good, That bright eternal beacon, by whose ray The voyager of time should shape his heedful way.