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Carried over 
We supply the following illuminating apparatus at 
their manufacturer's prices: 
a) For demonstration in lectures: 
Electric arc lamp, projection lamp by Schuckert of Nurem- 
berg, with inclinable carbons; about 3000 c. p. with 1(5 amp. 
Other arc lamps according to order. 
We are prepared to supply detailed information respecting 
complete electric plants and shall be happy to suggest the 
necessary machinery (motor , dynamomachine etc.) for our 
clients. (Approximate total cost 3500 to 4000 M. for 3000 
c. p.) 
b) for lower magnifications, sufficient for objective demon- 
strations at short distances of screen and for photographic work 
with high powers: 
Zircon or Magnesia light with oxy-hydro-carbon burner. 
The complete apparatus consists of an 
Oxy-hydro-carbon lamp, mounted on adjustable iron stand 
with flexible inlet pipes 
Platinum disc to receive the incandescent body, 10 mm dia. 
Incandescent body, disc of zircon, 10 mm dia 
,, ,, prepared magnesia 10 mm dia. . . . 
Gas generator for continuous supply of oxygen 
Gasometer, made of copper with pressure gauge for controlling 
pressure of oxygen 
The chemical works of Dr. Th. Elkan, Berlin N., Tegelerstr. 
15, supply compressed oxygen (100 atm.) in globes holding 1000 
litres (price M. 10.). 
To cany over 
