Lectures at Home: Discovery and Manufacture of Glass, Lenses and Mirrors, the Structure of the Eye |
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Page 10
... sand , which formed the shore of the river . A plant called kali grew there abundantly , and was of course burned to ashes . These ashes mixing with the bright , hard sand , which was melted by the heat of the fire , produced a sub ...
... sand , which formed the shore of the river . A plant called kali grew there abundantly , and was of course burned to ashes . These ashes mixing with the bright , hard sand , which was melted by the heat of the fire , produced a sub ...
Page 11
... sand . Suppose the accident the same in all its circumstances , and the story differing only in the characters of those who witnessed the pro- duction of this new substance . But can we think the result would have been the same ? That ...
... sand . Suppose the accident the same in all its circumstances , and the story differing only in the characters of those who witnessed the pro- duction of this new substance . But can we think the result would have been the same ? That ...
Page 12
... sand of the beach ? You know that hot water has the power of extracting the virtues of many plants ; we see this every day , in making tea and coffee , in brew- ing beer , and many other instances . I believe the Phoenicians went upon ...
... sand of the beach ? You know that hot water has the power of extracting the virtues of many plants ; we see this every day , in making tea and coffee , in brew- ing beer , and many other instances . I believe the Phoenicians went upon ...
Page 13
... sand ; and being freed from all its impurities , the application of sufficient heat will produce clear glass . Let us now observe the situation of the Pho- nicians who had made this grand discovery . They lived here on the shores of the ...
... sand ; and being freed from all its impurities , the application of sufficient heat will produce clear glass . Let us now observe the situation of the Pho- nicians who had made this grand discovery . They lived here on the shores of the ...
Page 23
... sand and the ashes of the kali . As the art of making glass improved and begun to be prac- tised in other countries , it was found that several plants beside kali would , after burning , yield a salt fit for the glass - maker . They are ...
... sand and the ashes of the kali . As the art of making glass improved and begun to be prac- tised in other countries , it was found that several plants beside kali would , after burning , yield a salt fit for the glass - maker . They are ...
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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
Popular passages
Page 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.
Page 18 - Dido pass ; Or held, by Solomon's own invitation, A torch at the great Temple's dedication.
Page 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...
Page 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...
Page 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.
Page 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.
Page 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.
Page 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!
Page 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...
Page 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!