A Treatise on the Kaleidoscope1858 |
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Page 76
... cone . The light of a bright flame , placed in front of the cone , will 76 ILLUMINATION OF TRANSPARENT OBJECTS . -ON THE ILLUMINATION OF TRANSPARENT OBJECTS In the KaleidoSCOPE,
... cone . The light of a bright flame , placed in front of the cone , will 76 ILLUMINATION OF TRANSPARENT OBJECTS . -ON THE ILLUMINATION OF TRANSPARENT OBJECTS In the KaleidoSCOPE,
Page 77
... cone . This will be understood from the an- nexed figure , where M A N C is a portion of the cone , fixed to the end E F of the Kaleidoscope , and m n o p the object- M FIG . 24 . R R TO A B E m n S D F N box . If the angle formed by ...
... cone . This will be understood from the an- nexed figure , where M A N C is a portion of the cone , fixed to the end E F of the Kaleidoscope , and m n o p the object- M FIG . 24 . R R TO A B E m n S D F N box . If the angle formed by ...
Page 78
... cone A B C D , and after passing through the transparent cylindrical rim m n o p , illuminate the objects . Another cone A M N C , with its angle less than a right angle , may be joined to A B D C , so as to throw the rays obliquely ...
... cone A B C D , and after passing through the transparent cylindrical rim m n o p , illuminate the objects . Another cone A M N C , with its angle less than a right angle , may be joined to A B D C , so as to throw the rays obliquely ...
Page 90
... cones , connected together by a middle piece or ring , RR , into which they are both screwed . These two cones enclose two highly - polished metallic reflectors , A O , в o , Fig . 31 , only one of them , viz . , BO E , being seen in ...
... cones , connected together by a middle piece or ring , RR , into which they are both screwed . These two cones enclose two highly - polished metallic reflectors , A O , в o , Fig . 31 , only one of them , viz . , BO E , being seen in ...
Page 91
... cones , so as just to touch a line in the reflector A O E , which coincides with the axis of the cone , and to form a junction with that line in every part of the two meeting planes . The very nice. CHAP . XI . OF POLYANGULAR ...
... cones , so as just to touch a line in the reflector A O E , which coincides with the axis of the cone , and to form a junction with that line in every part of the two meeting planes . The very nice. CHAP . XI . OF POLYANGULAR ...
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Common terms and phrases
A O E angle A O B angles of incidence angular aperture angular point apparent magnitude arranged beautiful brass rim catoptrics cell CHAPTER circle circular field coloured glass combination composed cone constructed convex lens DAVID BREWSTER direct vision distance effects produced equal exhibited Fcap figure fixed focal length half History images formed inches inclination Indigo instrument intensity inverted image JOHN WILSON CROKER Kaleido Kaleidoscope last sector lens light looking-glass LORD manner motion move number of reflexions number of sectors object placed object-box object-plate observer odd aliquot optical pair pattern pieces plane mirrors plates of glass Portrait position Post 8vo principles re-entering angles reflected images reflectors ring salient angles screw Second Edition sector A O B seen by direct shown in Fig side similarly situated speculum metal surface symmetrical picture symmetrically related Third Edition tion 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.