A Treatise on the Kaleidoscope1858 |
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Page 2
... the polarized tints , it was wholly destitute of symmetry , as I was then ignorant of those positions for the eye and the objects , which are absolutely necessary to produce that magical 2 HISTORY OF THE KALEIDOSCOPE .
... the polarized tints , it was wholly destitute of symmetry , as I was then ignorant of those positions for the eye and the objects , which are absolutely necessary to produce that magical 2 HISTORY OF THE KALEIDOSCOPE .
Page 3
David Brewster. objects , which are absolutely necessary to produce that magical union of parts , and that mathematical symmetry throughout the whole picture , which , independently of all colouring , give to the visions of the ...
David Brewster. objects , which are absolutely necessary to produce that magical union of parts , and that mathematical symmetry throughout the whole picture , which , independently of all colouring , give to the visions of the ...
Page 4
... necessary . 1. That the reflectors should be placed at an angle , which was an even or an odd aliquot part of a circle , when the object was regular , and similarly situated with respect to both the mirrors ; or the even aliquot part of ...
... necessary . 1. That the reflectors should be placed at an angle , which was an even or an odd aliquot part of a circle , when the object was regular , and similarly situated with respect to both the mirrors ; or the even aliquot part of ...
Page 8
... necessary to draw up the following short treatise , for the purpose of explaining , in as popular a manner as I could , the princi- ples and construction of the Kaleidoscope ; of describing the different forms in which it is fitted up ...
... necessary to draw up the following short treatise , for the purpose of explaining , in as popular a manner as I could , the princi- ples and construction of the Kaleidoscope ; of describing the different forms in which it is fitted up ...
Page 37
... necessary to the produc- tion of symmetrical and beautiful forms , and may be all effected by particular methods of construction , we shall pro- ceed to investigate the principles upon which these methods . are founded , in so far as ...
... necessary to the produc- tion of symmetrical and beautiful forms , and may be all effected by particular methods of construction , we shall pro- ceed to investigate the principles upon which these methods . are founded , in so far as ...
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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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Page 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.