A Treatise on the Kaleidoscope1858 |
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Page 2
... whole effect , though inconceivably inferior to the creations of the Kaleidoscope , was still far superior to anything that I had previously witnessed . In giving an account of these experiments to M. Biot on the 6th of March 1815 , I ...
... whole effect , though inconceivably inferior to the creations of the Kaleidoscope , was still far superior to anything that I had previously witnessed . In giving an account of these experiments to M. Biot on the 6th of March 1815 , I ...
Page 3
... whole picture , which , independently of all colouring , give to the visions of the Kaleidoscope the pecu- liar charm which distinguishes them from all artificial crea- tions.1 Although I had thus combined two plain mirrors , so as to ...
... whole picture , which , independently of all colouring , give to the visions of the Kaleidoscope the pecu- liar charm which distinguishes them from all artificial crea- tions.1 Although I had thus combined two plain mirrors , so as to ...
Page 13
... whole image at e , as perfect as any of the rest . In this last case , when the angle A O B is a little different from an even aliquot part of 360 ° , the eye at E will perceive at e an appearance of two incoincident images ; but this ...
... whole image at e , as perfect as any of the rest . In this last case , when the angle A O B is a little different from an even aliquot part of 360 ° , the eye at E will perceive at e an appearance of two incoincident images ; but this ...
Page 17
... whole ; for if the image is reflected from the poste- rior surface , as in the case of a looking - glass , the direct and the inverted image can never coalesce into one form , but must always be separated by a space equal to the ...
... whole ; for if the image is reflected from the poste- rior surface , as in the case of a looking - glass , the direct and the inverted image can never coalesce into one form , but must always be separated by a space equal to the ...
Page 18
... whole , in which there is nothing redundant and nothing . deficient ; and this is the precise effect which is produced by the application of the Kaleidoscope to the simple form abc . FIG . 5 . The fundamental principle , therefore , of ...
... whole , in which there is nothing redundant and nothing . deficient ; and this is the precise effect which is produced by the application of the Kaleidoscope to the simple form abc . FIG . 5 . The fundamental principle , therefore , of ...
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Common terms and phrases
A O E angle A O B angles of incidence angular aperture angular point apparent magnitude arranged beautiful brass rim catoptrics cell CHAPTER circle circular field coloured glass combination composed cone constructed convex lens DAVID BREWSTER direct vision distance effects produced equal exhibited Fcap figure fixed focal length half History images formed inches inclination Indigo instrument intensity inverted image JOHN WILSON CROKER Kaleido Kaleidoscope last sector lens light looking-glass LORD manner motion move number of reflexions number of sectors object placed object-box object-plate observer odd aliquot optical pair pattern pieces plane mirrors plates of glass Portrait position Post 8vo principles re-entering angles reflected images reflectors ring salient angles screw Second Edition sector A O B seen by direct shown in Fig side similarly situated speculum metal surface symmetrical picture symmetrically related Third Edition tion 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.