A Treatise on the Kaleidoscope1858 |
From inside the book
Արդյունքներ 34–ի 1-ից 5-ը:
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... four mirrors forming a 98 100 102 105 square , 107 · 2. On combinations of four mirrors forming a rectangle , 109 · 3. On combinations of three reflectors at angles of 60 ° , · 109 4. On combinations of three reflectors at angles of 90 ...
... four mirrors forming a 98 100 102 105 square , 107 · 2. On combinations of four mirrors forming a rectangle , 109 · 3. On combinations of three reflectors at angles of 60 ° , · 109 4. On combinations of three reflectors at angles of 90 ...
Էջ 6
... four competent judges , given in the Appendir In a trial for the infringement of a Patent several years ago , a distinguished instruments having been exhibited to some of the London opticians 6 HISTORY OF THE KALEIDOSCOPE .
... four competent judges , given in the Appendir In a trial for the infringement of a Patent several years ago , a distinguished instruments having been exhibited to some of the London opticians 6 HISTORY OF THE KALEIDOSCOPE .
Էջ 9
... four or five to ten or twelve inches long ; their greatest breadth being about an inch when the length is six inches , and increasing in proportion as the length increases . When these two plates are put together at an angle of 60 ...
... four or five to ten or twelve inches long ; their greatest breadth being about an inch when the length is six inches , and increasing in proportion as the length increases . When these two plates are put together at an angle of 60 ...
Էջ 30
... four times the velocity of the mirror . If the mirror м moves round a centre , the very same re- sults will be obtained from the very same reasoning , only the angular motion of the mirror and the image will then be more conveniently ...
... four times the velocity of the mirror . If the mirror м moves round a centre , the very same re- sults will be obtained from the very same reasoning , only the angular motion of the mirror and the image will then be more conveniently ...
Էջ 34
... four times as great as that of the mirror ; the next pair will have a velocity eight times as great , and the next pair a velocity sixteen times as great as that of the mirror , the velocity of any pair being always double the velocity ...
... four times as great as that of the mirror ; the next pair will have a velocity eight times as great , and the next pair a velocity sixteen times as great as that of the mirror , the velocity of any pair being always double the velocity ...
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Common terms and phrases
A O E aliquot angle A O B angles of incidence angular aperture angular point aperture A O B apparent magnitude beauty brass rim broad milled Camera Obscura cell centre CHAPTER circle circular field coloured glass combination composed cone construction convex lens direct vision distance effects produced equal exhibited Fcap figure fixed focal length History images formed inches inclination instrument inverted image JOHN WILSON CROKER Kaleido Kaleidoscope last sector light luminous m n o p manner metallic motion move object-box object-plate objects placed obliquely observer optical pieces plane mirrors plates of glass polygon Portrait position Post 8vo preceding principles rays re-entering angles reflected images regular polygon ring round salient angles screw Second Edition seen by direct shown in Fig side speculum metal square stationary symmetrical picture Third Edition three reflectors tion triangle tube velocity Vols Woodcuts
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Էջ 1 - Medal, the reflectors were in some cases inclined to each other, and he had occasion to remark the circular arrangement of the images of a candle round a centre, or the multiplication of the sectors formed by the extremities of the glass plates. In repeating, at a subsequent period, the experiments of M. Biot on the action of fluids upon light, Dr B.