504 



Spectrum Analysis and Synthesis. 



No. 54070 - 



11 



54070. 1:8. 



54 072. 1 : 16. 



54078. 1:9. 



* 54,070. Apparatus for Demonstrating the Spectrum and the Fraunhofer Lines, Figure, s. d. 



consisting of a flint glass prism of 40 mm side and an achromatic lens 50 mm diam., 



fitted together on one stand, the prism rotary 3. 0. 



The apparatus can be placed both in front of the heliostat or the projection lantern, as it has 

 a tall adjustable stand. 



* 54,071. - - idem, with prism of 45 mm side and achromatic lens 60 mm diameter ... 4. 0. 



* 54,072. Apparatus with 7 Mirrors, Figure, for re-combining the light split up into the 



spectrum colours; consisting of 7 plane mirrors 55 mm diam., in mounts, movable in 



all directions, on adjustable stand 4. 0. 



* 54,073. - - idem, smaller, with mirrors 40 mm diameter 3. 0. 



* 54,074. - - idem, with three mirrors 40 mm diameter 1. 10. 



* 54,075. Laminated Mirror after Costing (Ztschr. f. d. phys. u. chem. U. 11, 1898, p. 132; 



M. T. p. 186) 2. 10.0 



* 52,043. Oscillating Prism, Fig. 51,949 B, p. 278, for mixing the spectrum colours, for the Whir- 



ling Table (M. P., 8th. Edn., II, 1, Fig. 137), prism 60x30 mm; price without Whirlin- 



Table '. 1.5.0 



#52,044. -- idem, prism 70x35 mm, see No. 52,044, p. 285 1.10.0 



52.034. One Set Colour Discs, 7 different mono-chromatic discs and one with the seven colours 



of the spectrum (Gan.-Atk. Figs. 562/64), see No. 52,034, p. 284 0. 5.0 



The mono-chromatic discs are slotted in accordance with Maxwell's method, in order to produce 

 mixed colours and white. 



52.035. Newton's Colour Disc with the 7 Spectrum Colours, painted as clearly as possible on 



a metal disc, giving white when rotated, 120 mm size; see No. 52,035, p. 284 ... 0. 4.0 



52.036. - - idem, larger, 250 mm diameter, see No. 52,036 on p. 284 0. 6. 



54,076. Top for Rotating Colour Discs, Figure, with flywheel and grip, without Colour Disc 0. 10. 

 54,078. Colour Disc with Rotating Apparatus, Figure 1. 5.0 



The coloured sectors are on the back of the disc and are not visible in the illustration. 



51,969. Cord Gearing for setting colour discs and the like into very rapid rotation, fitting 

 Whirling Tables Nos. 51,949/51,968, cf. Fig. 51,969, p. 279; without Colour Disc or 

 Whirling Table 1. 0.0 



In addition to the Whirling Table and a Colour Disc being necessary for this collect inn, the 

 larger Cord Pulley of Apparatus No. 51,975 is required, and this Apparatus should be ordered separately 

 if not available. 



* 54,079. Transparent Colour Disc (Newton's) with 7 colours on glass, for objective projection, 



with device for rotating 1. 0.0 



The colour disc gives a good white. 



Cl. 1365, 



* Can be used with Projection Apparatus. isei, 1364, taue. 



