A Treatise on the Kaleidoscope1858 |
From inside the book
Արդյունքներ 45–ի 1-ից 5-ը:
Էջ 1
... reflecting plates were necessarily inclined to each other during the operation of placing their surfaces in parallel planes ; and I was therefore led to remark the circular arrangement of the images of a candle round a centre , and the ...
... reflecting plates were necessarily inclined to each other during the operation of placing their surfaces in parallel planes ; and I was therefore led to remark the circular arrangement of the images of a candle round a centre , and the ...
Էջ 2
... reflected images appeared at once in the form of two curves ; and that the succession of splendid colours formed a pheno- menon which I had no doubt would be considered , by every person who saw it to advantage , as one of the most ...
... reflected images appeared at once in the form of two curves ; and that the succession of splendid colours formed a pheno- menon which I had no doubt would be considered , by every person who saw it to advantage , as one of the most ...
Էջ 5
... reflected images had the same form and the same magnitude , in consequence of being placed at the same distance from the eye . This , also , was the position in which the eye was necessarily placed when looking through the fluid with ...
... reflected images had the same form and the same magnitude , in consequence of being placed at the same distance from the eye . This , also , was the position in which the eye was necessarily placed when looking through the fluid with ...
Էջ 11
... reflection of the rays forming either of the two last images " ( namely , bo ẞ and a o a ) ; but this is clearly absurd , for the sector a oẞ would thus be formed of two images lying above each other , which is impossible . In order to ...
... reflection of the rays forming either of the two last images " ( namely , bo ẞ and a o a ) ; but this is clearly absurd , for the sector a oẞ would thus be formed of two images lying above each other , which is impossible . In order to ...
Էջ 12
... images , bo ß , a oa , but is composed of the images of two half sectors , one of which is formed by the mirror A o , and the other by the mirror B 0 . mirror a 0 . Mr ... reflected image x will be formed 12 CHAP . I. PRELIMINARY PRINCIPLES.
... images , bo ß , a oa , but is composed of the images of two half sectors , one of which is formed by the mirror A o , and the other by the mirror B 0 . mirror a 0 . Mr ... reflected image x will be formed 12 CHAP . I. PRELIMINARY PRINCIPLES.
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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.