No. 5 



Projection Apparatus on Stand. 



167 



50 842. 1 : 12. 



50856. 1:10. 



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Kohl's Megadiascope. Detailed description and prices of this universal projector (which can be adapted 

 to all kinds of projection in use -- for photographs and apparatus; also for microscopic, mega- 

 -rnpic and horizontal projection; for use in conjunction with Paalzow's optical bench, and for 

 optical experiments, etc.) are given on pp. 1201 1232 (bound up at the end of this section), 

 Fig. 9515. 



Skiopticon, with Optical Bench and Achromatic Objective, F i g. 50,842. 



The house is constructed of sheet iron and has 2 doors; it has double walls and is well ventilated. The 

 doors are provided with peep holes. 



Switchboards, Series Resistances for D. C. Arc Lamps, and Transformers for A. C. also Flexible Double Cable, 

 see pp. 168 and 169. 



50.855. Projection Apparatus on Stand (Kolbe type), cf. Fig. 50,856 (Kolbe, Einfiihrung in die d. 

 Elektrizitatslehre, 2 nd Edition, Vol. II, 1905, Fig. 13 and p. 186. Kolbe-Skellon, Introduc- 

 tion into Electricity, Fig. 88), with arc lamp Xo. 50,892 for hand regulation; in simple house ! 7. 0. 



50.856. - - do., with triple Nernst Lamp Xo. 50,923, Figure j 7. 0. 



When ordering, kindly quote the type of current and the voltage. 



Cl. 249, 1546. 



