Geometrical Optics: Adapted to the Use of the Higher Classes in Schools, Etc |
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Page 87
... of remote objects are their want of light and magnitude , and both these defects are farther increased by concave lenses . " ( Encyclopædia Metropolitana . ) CHAPTER XI . Telescopes . 73. Roger Bacon , A. X. ] 87 LENSES .
... of remote objects are their want of light and magnitude , and both these defects are farther increased by concave lenses . " ( Encyclopædia Metropolitana . ) CHAPTER XI . Telescopes . 73. Roger Bacon , A. X. ] 87 LENSES .
Page 88
... telescopes and microscopes . In 1570 , in the first English edition of Euclid's Ele- ments , by Sir Henry Billingsley , there are mentioned " per- spective glasses , " clearly the same as our telescope . In 1591 , Thomas Digges of ...
... telescopes and microscopes . In 1570 , in the first English edition of Euclid's Ele- ments , by Sir Henry Billingsley , there are mentioned " per- spective glasses , " clearly the same as our telescope . In 1591 , Thomas Digges of ...
Page 89
... telescopes in Holland . Borelli informs us that the children of Zachariah Jansen , a spectacle - maker of Middle - Burgh , amusing them- selves in their father's shop , placed by chance a convex and a concave lens in such a way , that ...
... telescopes in Holland . Borelli informs us that the children of Zachariah Jansen , a spectacle - maker of Middle - Burgh , amusing them- selves in their father's shop , placed by chance a convex and a concave lens in such a way , that ...
Page 91
... telescope , from the following facts . " Happening to be in Venice in the month of May 1609 , he learned in that city that a Belgian had invented a perspective instrument , by means of which distant objects appeared nearer and larger ...
... telescope , from the following facts . " Happening to be in Venice in the month of May 1609 , he learned in that city that a Belgian had invented a perspective instrument , by means of which distant objects appeared nearer and larger ...
Page 92
... telescope of superior magnifying power . This he found to be a task of very difficult accomplishment , for the art of grinding and polishing lenses was then in its infancy .... Soon afterwards he made another instrument which magnified ...
... telescope of superior magnifying power . This he found to be a task of very difficult accomplishment , for the art of grinding and polishing lenses was then in its infancy .... Soon afterwards he made another instrument which magnified ...
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Common terms and phrases
Algebra angle of incidence Aq AQ ARITHMETIC astronomical beam beginners BROOKE FOSS WESTCOTT called Cambridge caustic curve centre CHAPTER Christ's College circle CLASS-BOOK Clifton College cloth colours concave lens Conic Sections conical convex lens cornea course Crown 8vo direction divergent ELEMENTARY TREATISE English Examination Papers explain Extra fcap eye-lens figure focal length formed Fourth Edition Galilean Geometrical Focus glass Grammar Greek Head Master John's College late Fellow Latin lenses luminous point magnifying power minimum deviation mirror MIXED MATHEMATICS nearer numerous Examples object object-glass OPTICS parallel rays pencil of rays placed plane reflexion point q principal focus principles prism rays close rays fall rays from Q rays which fall reader red rays reflected rays reflecting telescope retina Schools Second Edition seen shew small pencil spectrum straight line student Suppose telescope tion TRIGONOMETRY violet
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