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 StatesJ. & J.W. Prentiss, 1830 - 320 страница |
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Страница 23
... hundred . Modern history , beginning with that period , reaches down to the pre- sent times . General history relates to nations and public af- fairs , and may be subdivided into ecclesiastical and civil , or ac- cording to some writers ...
... hundred . Modern history , beginning with that period , reaches down to the pre- sent times . General history relates to nations and public af- fairs , and may be subdivided into ecclesiastical and civil , or ac- cording to some writers ...
Страница 35
... hundred miles in twenty hours , your velocity is five miles in each hour . You may reverse this rule and say , that the time is equal to the space divided by the velocity , for one hundred divided by five gives twenty hours for the time ...
... hundred miles in twenty hours , your velocity is five miles in each hour . You may reverse this rule and say , that the time is equal to the space divided by the velocity , for one hundred divided by five gives twenty hours for the time ...
Страница 41
... hundred pounds , by the strength of a man equal to a hundred pounds weight . Now as the man's strength is only equal to the tenth part of the weight of the body to be raised , the arm of the lever , to which his strength is to be ...
... hundred pounds , by the strength of a man equal to a hundred pounds weight . Now as the man's strength is only equal to the tenth part of the weight of the body to be raised , the arm of the lever , to which his strength is to be ...
Страница 43
... hundred weight . The wheel and axle may be considered as a perpetual lever , the centre of the axle being the ... hundred pounds would be balanced on it by one hundred , because the plane is five times the length of the perpendicular ...
... hundred weight . The wheel and axle may be considered as a perpetual lever , the centre of the axle being the ... hundred pounds would be balanced on it by one hundred , because the plane is five times the length of the perpendicular ...
Страница 44
... hundred . It is much less labori- ous to ascend a hill by a winding gentle ascent than to climb up a steep declivity . In addition to there being a greater force required in ascending a hill , horses , that draw a load , are placed in a ...
... hundred . It is much less labori- ous to ascend a hill by a winding gentle ascent than to climb up a steep declivity . In addition to there being a greater force required in ascending a hill , horses , that draw a load , are placed in a ...
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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 Linnæus 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
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Страница 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.
Страница 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.
Страница 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...
Страница 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.
Страница 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.
Страница 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.
Страница 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.
Страница 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.
Страница 251 - As beasts excel cold rocks and brambles rude ; Men, who their duties know, But know their rights, and, knowing, dare maintain...
Страница 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.