A Treatise on the Kaleidoscope1858 |
From inside the book
Արդյունքներ 33–ի 1-ից 5-ը:
Էջ 8
... tion ; and of instructing the artist how to employ it in the numerous branches of the useful and ornamental arts to which it is applicable . CHAPTER I. PRELIMINARY PRINCIPLES RESPECTING THE EFFECTS OF COMBINING TWO 8 HISTORY OF THE ...
... tion ; and of instructing the artist how to employ it in the numerous branches of the useful and ornamental arts to which it is applicable . CHAPTER I. PRELIMINARY PRINCIPLES RESPECTING THE EFFECTS OF COMBINING TWO 8 HISTORY OF THE ...
Էջ 12
... tion of that Corollary is decidedly erroneous . This Corol- lary is stated in the following manner : — “ When a ( the angle of the mirrors ) is a measure of 180 ° two images coin- cide , " and it is demonstrated , that since two images ...
... tion of that Corollary is decidedly erroneous . This Corol- lary is stated in the following manner : — “ When a ( the angle of the mirrors ) is a measure of 180 ° two images coin- cide , " and it is demonstrated , that since two images ...
Էջ 17
... tion from the first surface of the mirror , in order that the direct and the reflected image may join , and constitute one united whole ; for if the image is reflected from the poste- rior surface , as in the case of a looking - glass ...
... tion from the first surface of the mirror , in order that the direct and the reflected image may join , and constitute one united whole ; for if the image is reflected from the poste- rior surface , as in the case of a looking - glass ...
Էջ 28
... tion as the Kaleidoscope , while the sector seen by direct vision , and all the sectors formed by an even number of reflexions , are at rest . In order to understand this , let M , Fig . 10 , be a plane mirror , and 28 EFFECTS PRODUCED ...
... tion as the Kaleidoscope , while the sector seen by direct vision , and all the sectors formed by an even number of reflexions , are at rest . In order to understand this , let M , Fig . 10 , be a plane mirror , and 28 EFFECTS PRODUCED ...
Էջ 32
... tion , and with the same velocity as the images in the sectors дов , воа . By a similar process of reasoning , the same results will be obtained , whatever be the number of the sectors , and whether the angle A O B be the even or the ...
... tion , and with the same velocity as the images in the sectors дов , воа . By a similar process of reasoning , the same results will be obtained , whatever be the number of the sectors , and whether the angle A O B be the even or the ...
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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.