A Treatise on the Kaleidoscope1858 |
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Page 5
... tube , and fitted up on the preceding principles , the Kaleidoscope , in its simple form , was completed . In this form , however , the Kaleidoscope could not be considered as a general philosophical instrument of univer- sal ...
... tube , and fitted up on the preceding principles , the Kaleidoscope , in its simple form , was completed . In this form , however , the Kaleidoscope could not be considered as a general philosophical instrument of univer- sal ...
Page 6
... tube , con- taining a convex lens , or , what is better , an achromatic object - glass of such a focal length , that the images of objects , of all magnitudes and at all distances , might be distinctly formed at the end of the ...
... tube , con- taining a convex lens , or , what is better , an achromatic object - glass of such a focal length , that the images of objects , of all magnitudes and at all distances , might be distinctly formed at the end of the ...
Page 36
... tube and lens described in Chapter X. , and by employing the vertical and horizontal bars of a window , which may be set at different angles , by viewing them in perspective . CHAPTER IV . ON THE EFFECTS PRODUCED UPON THE SYMMETRY 36 ...
... tube and lens described in Chapter X. , and by employing the vertical and horizontal bars of a window , which may be set at different angles , by viewing them in perspective . CHAPTER IV . ON THE EFFECTS PRODUCED UPON THE SYMMETRY 36 ...
Page 51
... tube whose diameter is equal to that of the cir- cular field . This approximation to uniformity in the inten- sity of the light in all the sectors , which arises wholly from the determination of the proper position of the eye , is one ...
... tube whose diameter is equal to that of the cir- cular field . This approximation to uniformity in the inten- sity of the light in all the sectors , which arises wholly from the determination of the proper position of the eye , is one ...
Page 59
... tube from the posterior surface of the glass plates , that surface should be coated with a varnish of the same refrac- tive and dispersive power as the glass . If the plates of glass have been skilfully cut with the diamond , so as to ...
... tube from the posterior surface of the glass plates , that surface should be coated with a varnish of the same refrac- tive and dispersive power as the glass . If the plates of glass have been skilfully cut with the diamond , so as to ...
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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.