Lectures at Home: Discovery and Manufacture of Glass, Lenses and Mirrors, the Structure of the EyeDarton and Harvey, 1834 - 211 էջ |
From inside the book
Արդյունքներ 18–ի 1-ից 5-ը:
Էջ 19
... whole figure , they were formed of thin plates of some inferior metal , silvered over . A white metal , composed by mixing copper and tin , was also used for the purpose ; and as such mirrors soon became dim , it was customary to keep a ...
... whole figure , they were formed of thin plates of some inferior metal , silvered over . A white metal , composed by mixing copper and tin , was also used for the purpose ; and as such mirrors soon became dim , it was customary to keep a ...
Էջ 22
... whole of the civilized world . The middle ages are sometimes called the dark ages , because the ancient learning was then so much forgotten or neglected , that the greater part of Europe relapsed into an almost barba- rous state , and ...
... whole of the civilized world . The middle ages are sometimes called the dark ages , because the ancient learning was then so much forgotten or neglected , that the greater part of Europe relapsed into an almost barba- rous state , and ...
Էջ 23
... Whole , without stooping , towering crest and all . " You will now , I hope , recollect the circum- stances which led to the discovery of this useful art , and that the first glass was composed of sand and the ashes of the kali . As the ...
... Whole , without stooping , towering crest and all . " You will now , I hope , recollect the circum- stances which led to the discovery of this useful art , and that the first glass was composed of sand and the ashes of the kali . As the ...
Էջ 46
... whole substance . * If glass were allowed to grow cool in the open air , the outside would cool first , and it would be liable to break with the slightest scratch or touch . Some peo- ple think the reason of this is , that the outer ...
... whole substance . * If glass were allowed to grow cool in the open air , the outside would cool first , and it would be liable to break with the slightest scratch or touch . Some peo- ple think the reason of this is , that the outer ...
Էջ 50
... whole drop will burst into minute fragments . I have heard , that if one of these drops is put into a phial or tall glass filled with water , and the end of it is broken off with a pair of pincers , the bulb will fly in pieces with such ...
... whole drop will burst into minute fragments . I have heard , that if one of these drops is put into a phial or tall glass filled with water , and the end of it is broken off with a pair of pincers , the bulb will fly in pieces with such ...
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Common terms and phrases
ACHROMATIC TELESCOPE Alexander Severus ancient appear Arnott basin beads beautiful beneath bright burning-glasses called camera-obscura casting contrived converge convex lens cool crown-glass crystalline lens dark deception discovery distance distinct Dollond eclipse ELEUSINIAN MYSTERIES employed eye-glass farther Father Scheiner feet FINDING THE LONGITUDE fish flint-glass focus Galileo glass globe Greenwich half bound heat HERCULANEUM Hutton instrument inverted Joyce Jupiter kinds of glass Lardner LECTURE lenses looking looking-glasses magnified means melted microscope moon Mosaic Mount Etna Mysteries object object-glass observe OPTICAL oven pass perceive person phantom phial pieces of glass plate of glass plate-glass PORTLAND VASE power of refraction prism produced pupil quicksilver rays of light rays proceeding reflected REFLECTING TELESCOPES refraction retina Roman round sand seems seen Septimius Severus shilling specimen substance suppose surface telescope thing tin-foil tion TRANSIT OF VENUS transparent tube window word
Սիրված հատվածներ
Էջ 202 - Thus with the year Seasons return, but not to me returns Day, or the sweet approach of even or morn, Or sight of vernal bloom, or summer's rose, Or flocks, or herds, or human face divine: But cloud instead, and ever-during dark Surrounds me, from the cheerful ways of men Cut off, and for the book of knowledge fair Presented with a universal blank Of nature's works, to me expunged and rased, And wisdom at one entrance quite shut out.
Էջ 18 - Dido pass ; Or held, by Solomon's own invitation, A torch at the great Temple's dedication.
Էջ 17 - Revisiting the glimpses of the moon, Not like thin ghosts, or disembodied creatures, But with thy bones and flesh, and limbs and features. Tell us, for doubtless thou canst recollect, To whom should we assign the Sphinx's fame ? Was Cheops or Cephrenes architect Of either pyramid that bears his name ? Is Pompey's pillar really a misnomer ? Had Thebes a hundred gates, as sung by Homer...
Էջ 20 - And standest undecayed within our presence, Thou wilt hear nothing till the Judgment morning, When the great trump shall thrill thee with its warning. Why should this worthless tegument endure, If its undying guest be lost...
Էջ 19 - Since first thy form was in this box extended We have, above ground, seen some strange mutations : The Roman empire has begun and ended, New worlds have risen, we have lost old nations; And countless kings have into dust been humbled, While not a fragment of thy flesh has crumbled.
Էջ 17 - Memnonium was in all its glory, And time had not begun to overthrow Those temples, palaces, and piles stupendous, Of which the very ruins are tremendous. Speak! for thou long enough hast acted dummy. Thou hast a tongue, - come, let us hear its tune; Thou'rt standing on thy legs above ground, mummy! Revisiting the glimpses of the moon, Not like thin ghosts or disembodied creatures, But with thy bones and flesh, and limbs and features.
Էջ 202 - Though hard and rare : thee I revisit safe, And feel thy sovran vital lamp ; but thou Revisit'st not these eyes, that roll in vain To find thy piercing ray, and find no dawn ; So thick a drop serene hath quenched their orbs, Or dim suffusion veiled.
Էջ 16 - AND thou hast walked about (how strange a story!) In Thebes's streets three thousand years ago, When the Memnonium was in all its glory, And time had not begun to overthrow Those temples, palaces, and piles stupendous, Of which the very ruins are tremendous!
Էջ 114 - Fair all the pageant, — but how passing fair The slender form which lay on couch of Ind ! O'er her white bosom strayed her hazel hair, Pale her dear cheek, as if for love she pined ; All in her night-robe loose she lay reclined...
Էջ 18 - Thou couldst develop — if that withered tongue Might tell us what those sightless orbs have seen — How the world looked when it was fresh and young, And the great deluge still had left it green; Or was it then so old that history's pages Contained no record of its early ages ? Still silent!