A Treatise on the Kaleidoscope1858 |
From inside the book
Արդյունքներ 55–ի 1-ից 5-ը:
Էջ 5
... seen ; and that this point was the only one out of an infinite number at which the uniformity of the light of the circular field was a maxi- mum , and from which the direct and the reflected images had the same form and the same ...
... seen ; and that this point was the only one out of an infinite number at which the uniformity of the light of the circular field was a maxi- mum , and from which the direct and the reflected images had the same form and the same ...
Էջ 10
... seen round o is therefore explained the first , A O B , is the white paper sector seen by direct vision ; the second , A o b , is an image of the first formed by one reflexion from the mirror a o ; and the third is another image of the ...
... seen round o is therefore explained the first , A O B , is the white paper sector seen by direct vision ; the second , A o b , is an image of the first formed by one reflexion from the mirror a o ; and the third is another image of the ...
Էջ 12
... seen by the last reflexion from the mirror B O E , and another image would be seen at x , if the mirror A O E had extended as far as x ; but as this is impossible , without covering the part of the mirror B o E , which gives the first ...
... seen by the last reflexion from the mirror B O E , and another image would be seen at x , if the mirror A O E had extended as far as x ; but as this is impossible , without covering the part of the mirror B o E , which gives the first ...
Էջ 13
... seen by reflexion from the mirror to which it is nearest will be ,,, 10 , 12 , while the num- ber of images formed by the mirror from which x is most distant will be 1 , § — 1 , § — 1 , -1 ; that is , an image more always reaches the ...
... seen by reflexion from the mirror to which it is nearest will be ,,, 10 , 12 , while the num- ber of images formed by the mirror from which x is most distant will be 1 , § — 1 , § — 1 , -1 ; that is , an image more always reaches the ...
Էջ 18
... by converting simple into compound or beautiful forms , and arranging them , by successive reflexions , into one perfect whole . This principle , it will be readily seen , cannot 18 CHAP . II . PRINCIPLES OF THE KALEIDOSCOPE .
... by converting simple into compound or beautiful forms , and arranging them , by successive reflexions , into one perfect whole . This principle , it will be readily seen , cannot 18 CHAP . II . PRINCIPLES OF THE KALEIDOSCOPE .
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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.