The Literary and Scientific Class Book: Embracing the Leading Facts and Principles of Science with Many Difficult Words Explained at the Heads of the Lessons, and Questions Annexed for Examination. Selected from the Rev. John Platts' Literary and Scientific Class Book, and from Various Other SourcesJohn Prentiss, 1827 - 318 страница |
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Страница 56
... rays of light from the sun . The air is invisible because it is perfectly transparent ; but it may be felt on moving the hand in it , or when it moves and produces what we call wind . It is nearly nine hundred times lighter than water ...
... rays of light from the sun . The air is invisible because it is perfectly transparent ; but it may be felt on moving the hand in it , or when it moves and produces what we call wind . It is nearly nine hundred times lighter than water ...
Страница 66
... light . Transparent , admitting rays of light to pass through . Opaque ' , stopping the rays of light . Zenith , a point in the heavens directly over our heads , the pole of the horizon . Na'dir is a point diametrically opposite to the ...
... light . Transparent , admitting rays of light to pass through . Opaque ' , stopping the rays of light . Zenith , a point in the heavens directly over our heads , the pole of the horizon . Na'dir is a point diametrically opposite to the ...
Страница 67
... LIGHT , 67 A ray as an elastic ball which is struck against a wall . of light striking perpendicularly upon a plane mirror , is re- flected back in the same direction ; but those rays which strike it obliquely , are reflected back in an ...
... LIGHT , 67 A ray as an elastic ball which is struck against a wall . of light striking perpendicularly upon a plane mirror , is re- flected back in the same direction ; but those rays which strike it obliquely , are reflected back in an ...
Страница 68
... LIGHT . perpendicular . If you put a piece of money into an empty basin , and stand at such a distance that it may not be visi- ble ; then let another person pour water into the basin , and the money will be seen ; for the rays of light ...
... LIGHT . perpendicular . If you put a piece of money into an empty basin , and stand at such a distance that it may not be visi- ble ; then let another person pour water into the basin , and the money will be seen ; for the rays of light ...
Страница 69
... rays of light coming from a point , and continually sepa- rating as they proceed , are said to diverge ; the point is called the radiant point . Converge ' , rays which tend to a common point are said to converge . A Beam of light is a ...
... rays of light coming from a point , and continually sepa- rating as they proceed , are said to diverge ; the point is called the radiant point . Converge ' , rays which tend to a common point are said to converge . A Beam of light is a ...
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Друга издања - Прикажи све
The Literary and Scientific Class Book: Embracing the Leading Facts and ... Levi Washburn Leonard,John Platts Приказ није доступан - 2016 |
Чести термини и фразе
acid angle animal animalcules apparent magnitude appear atmospheric air attraction axis barometer called caloric candle celestial centre combined combustion comets concave conductor convex lens dark degree Describe diameter distance diving bell earth eclipse elasticity electric equal equator fall fixed flower fluid focus force glass gravity heat heavens hundred inch insects invented iron Jupiter kind lenses LESSON machine magnet magnifying magnitude mercury meridian metal microscope millions of miles minerals minutes mirror moon motion naked eye nature night object optics orbit oxyd oxygen particles pass piece piston planets plate poles prism produced QUESTIONS.-1 rays of light rection reflected refraction retina revolve round round the sun salts side sidereal day skreen solar solar day solid sonorous body sound specific gravities stars substances sulphur sulphuric acid surface telescope tion tube Uranus valve vapour vegetable vessel Vesta vibrations weather weight
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Страница 228 - 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 156 - Soft roll your incense, herbs, and fruits, and flowers, In mingled clouds to Him, whose sun exalts, • Whose breath perfumes you, -and whose pencil paints.
Страница ii - District, has deposited in this office the title of a book, the right whereof he claims as proprietor, in the words following, to wit : " THE CHILD'S BOTANY," In conformity to the act of the Congress of the United States, entitled, " An act for the encouragement of learning by securing the copies of maps, charts, and books to the authors and proprietors of such copies, during the times therein mentioned...
Страница 228 - 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 230 - 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 61 - 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 88 - ... 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.
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 211 - As beasts excel cold rocks and brambles rude ; Men, who their duties know, But know their rights, and, knowing, dare maintain...
Страница 68 - Horrid with frost and turbulent with storm, Blows autumn, and his golden fruits, away : Then melts into the spring : soft spring, with breath Favonian, from warm chambers of the south, Recalls the first.