A Treatise on the Kaleidoscope |
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Page 33
... containing the fixed mirror , The images formed S 2 and 3 2 4 and 5 by ៤ reflections , move with 4 times the velocity of 6 and 7 8 the mir- 8 and 9 16 ror ; whereas in the semicircle M a e , containing the moveable mirror , S The 1 and ...
... containing the fixed mirror , The images formed S 2 and 3 2 4 and 5 by ៤ reflections , move with 4 times the velocity of 6 and 7 8 the mir- 8 and 9 16 ror ; whereas in the semicircle M a e , containing the moveable mirror , S The 1 and ...
Page 82
... containing a plane glass screws into the outer ring CD , when the instrument is not in use ; and there is an object plate containing frag- ments of differently coloured glass . This object plate consists of two plates of glass , one ...
... containing a plane glass screws into the outer ring CD , when the instrument is not in use ; and there is an object plate containing frag- ments of differently coloured glass . This object plate consists of two plates of glass , one ...
Page 86
... containing a convex lens . A short tube , or cell , a a a a , for containing the object plates , slips upon the end of the tube , and should always be moved round from right to left , in order that the motion may not unscrew the portion ...
... containing a convex lens . A short tube , or cell , a a a a , for containing the object plates , slips upon the end of the tube , and should always be moved round from right to left , in order that the motion may not unscrew the portion ...
Contents
Page | 4 |
On the principles of the Kaleido | 15 |
On the effects produced upon | 35 |
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Common terms and phrases
angle A O B angles of incidence angular aperture angular point apparent magnitude applied beauty brass rim catoptric centre CHAP circle circular field coloured glass combination composed constructed convex lens direct vision distance effects produced equal exhibited eye end field of view figure fixed flectors focal length fragments gular half Hence images formed inches inclination Indigo instru instrument intensity inverted image ject Kaleido Kaleidoscope last reflected last sector leidoscope lens light looking-glass M N O P magnitude manner ment mirror A O motion move number of images number of reflections number of sectors object plate odd aliquot optical ornaments pattern pieces placed plane mirrors polygon position principles rays rectilineal reflected images regular polygon ring RR rors round scholium screws seen by direct semitones shewn in Fig shews side specula speculum speculum metal square stationary Street Madison surface symmetrical picture symmetrically related three reflectors tion transparent triangle velocity