A Treatise on the Kaleidoscope1858 |
From inside the book
Արդյունքներ 25–ի 1-ից 5-ը:
Էջ 8
... methods of using it as an instrument of recrea- 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 ...
... methods of using it as an instrument of recrea- 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 ...
Էջ 37
... methods of construction , we shall pro- ceed to investigate the principles upon which these methods . are founded , in so far as the position of the eye is con- cerned . When any object is made to touch a common looking- glass in one or ...
... methods of construction , we shall pro- ceed to investigate the principles upon which these methods . are founded , in so far as the position of the eye is con- cerned . When any object is made to touch a common looking- glass in one or ...
Էջ 54
... method of using the table , let us suppose that the angle of incidence , or o R p , Fig . 19 , is 85 ° then the number of rays in the corresponding point of the reflected sector a ob ( Fig . 17 ) will be 543. By letting fall ...
... method of using the table , let us suppose that the angle of incidence , or o R p , Fig . 19 , is 85 ° then the number of rays in the corresponding point of the reflected sector a ob ( Fig . 17 ) will be 543. By letting fall ...
Էջ 55
... method of calculation is applicable only with strictness to the two sectors A o b , Boa , formed by one reflexion , for the intensity of the light in the other sectors which are formed by more than one reflexion , must be affected by ...
... method of calculation is applicable only with strictness to the two sectors A o b , Boa , formed by one reflexion , for the intensity of the light in the other sectors which are formed by more than one reflexion , must be affected by ...
Էջ 62
... method of forming , select- ing , and mixing the objects , will be described in the next chapter . At present , we shall confine our attention to the various methods which may be employed in applying them to the end of the reflectors ...
... method of forming , select- ing , and mixing the objects , will be described in the next chapter . At present , we shall confine our attention to the various methods which may be employed in applying them to the end of the reflectors ...
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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.