Lectures at Home: Discovery and Manufacture of Glass, Lenses and Mirrors, the Structure of the EyeDarton and Harvey, 1834 - 211 páginas |
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Página 28
... letters Flu . printed after the names of rivers ; the Latin word for river is flumen : a river flows along between its banks . Our English word fluid has the same origin ; we apply it to liquids , to sub- stances that will flow , and ...
... letters Flu . printed after the names of rivers ; the Latin word for river is flumen : a river flows along between its banks . Our English word fluid has the same origin ; we apply it to liquids , to sub- stances that will flow , and ...
Página 65
... letters are sorted and laid before a compo- sitor in a printing - office . A paste made of calcined marble , fine sand , gum , white of eggs , and oil , must then be spread , as a ground to receive the glass pins . The paste should be ...
... letters are sorted and laid before a compo- sitor in a printing - office . A paste made of calcined marble , fine sand , gum , white of eggs , and oil , must then be spread , as a ground to receive the glass pins . The paste should be ...
Página 124
... letters of a larger size , and more distinct in form than they could without such assistance . On the strength of this and some other passages , the invention of reading- glasses has been ascribed to Bacon ; but others have disputed his ...
... letters of a larger size , and more distinct in form than they could without such assistance . On the strength of this and some other passages , the invention of reading- glasses has been ascribed to Bacon ; but others have disputed his ...
Página 156
... letters appear magnified , only because you are enabled to distinguish them at a shorter distance . I have now made a hole with a much smaller pin ; and you will find that the letters are still more magnified , but less distinct than ...
... letters appear magnified , only because you are enabled to distinguish them at a shorter distance . I have now made a hole with a much smaller pin ; and you will find that the letters are still more magnified , but less distinct than ...
Página 164
... the power of magnifying dimi- nishes . You see that the fifth , or lowest power , is the largest lens of all . With No. 5 , applied close to the eye , I can read a word of three or COMPOUND MICROSCOPE . 165 four letters distinctly , and ...
... the power of magnifying dimi- nishes . You see that the fifth , or lowest power , is the largest lens of all . With No. 5 , applied close to the eye , I can read a word of three or COMPOUND MICROSCOPE . 165 four letters distinctly , and ...
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Termos e frases comuns
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
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Página 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.
Página 18 - Dido pass ; Or held, by Solomon's own invitation, A torch at the great Temple's dedication.
Página 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...
Página 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...
Página 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.
Página 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.
Página 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.
Página 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!
Página 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...
Página 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!