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Megadiascope. 



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Fig. 27. No. 9500 with Nos. 9529 and 9638. 1 : 15. 



Price List. 

 Megadiascope, large Model, 3050 amperes Direct Current. 



9500. Kohl's Megadiascope (German Design), large Model, F i g. 27, with arc lamp for 30 

 to 50 amperes Direct Current with hand regulation, for diapositives up to 9 x 12 cm. 

 and opaque illustrations up to 18 x 24 cm. with Horizontal Projection Apparatus and 

 Megascope, and with size 1 optical outfit. Price, exclusive of Table or Kegulatinu 

 Kesistance .................................. 



For prices of the Megadiascope with other Optical Outfits, see Table on p. 1220. 



This megadiascope has a projector are lamp, handregulated, for direct current of 30 to 50 amperes; 

 parabolic mirror 280mm. in diameter; condenser 170mm. in diameter; achromatic projection objective with 

 rack and pinion focussing; continuous cooling water trough, with cock, and arranged for filling with 

 ferrous ammonium sulphate; adjustable stage on slider; objective carrier on slider; extensible optical 

 bench with upright for supporting same; diapositive change-frame for size 9 x lO'/s cm.; oak chamber 

 with peep-holes of dark glass, and curtains; oblique adjusting arrangement for the superstructure of the 

 house by means of a screw ; metal projection chamber with air-circulation ; doors with peep-glasses, together 

 with double-pole switch, wood tongs and key for the carbons; a Horizontal Projection Apparatus, 1-' i g. 6, 



66. 0. 



Cl 4022. 



