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 130
... eclipse of the sun . The same thing occasionally happens with Venus , but she is at so great a distance , that we cannot see it without the help of a telescope : through that instrument she has been observed passing over the sun's face ...
... eclipse of the sun . The same thing occasionally happens with Venus , but she is at so great a distance , that we cannot see it without the help of a telescope : through that instrument she has been observed passing over the sun's face ...
Página 132
... eclipses of the moons of Jupiter have enabled astronomers to determine the longitude of different places on the earth . Perhaps I may be able to give you some notion of the way in which this is done . No doubt some of you have learned ...
... eclipses of the moons of Jupiter have enabled astronomers to determine the longitude of different places on the earth . Perhaps I may be able to give you some notion of the way in which this is done . No doubt some of you have learned ...
Página 133
... other on Mount Etna , have their telescopes in readiness to observe the phenomenon . They will both see the eclipse at the same moment of time ; but if the English 134 FINDING THE LONGITUDE observer finds , on looking at.
... other on Mount Etna , have their telescopes in readiness to observe the phenomenon . They will both see the eclipse at the same moment of time ; but if the English 134 FINDING THE LONGITUDE observer finds , on looking at.
Página 134
... eclipses may be calculated beforehand . tronomers have observed these satellites so ac- curately , that they can tell how long they are in revolving round Jupiter , when they will pass into his shadow , and how soon they will re- appear ...
... eclipses may be calculated beforehand . tronomers have observed these satellites so ac- curately , that they can tell how long they are in revolving round Jupiter , when they will pass into his shadow , and how soon they will re- appear ...
Página 135
... eclipse , and the hour and the minute in the printed table , which is computed for the meri- dian of Greenwich : he must then allow fifteen degrees for every hour of difference ; and thus he may easily find the longitude of any place on ...
... eclipse , and the hour and the minute in the printed table , which is computed for the meri- dian of Greenwich : he must then allow fifteen degrees for every hour of difference ; and thus he may easily find the longitude of any place on ...
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Términos y frases comunes
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
Pasajes populares
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!