172 



Projection Apparatus and Accessories. 



Xo. .-,11933 



50 933. 1 : 3. 



50 936. 1 : 5 



50 940. 1 : 3. 



50 944. 1 : 3. 



p 

 3 



50.933. Thorium Light Burner (as suggested by Prof. Linnemann), Fig. 50,933, with s <1 

 1 thorium plate 2. 5. o 



The light is produced by rendering incandescent a thorium slab mounted in platinum, by means 

 of a flame supplied by house gas and oxygen. The thorium slabs can be used many hundreds of times. 



The consumption of oxygen and house gas is: -j 



for 60 candle-power, 24 litres gas and 15 litres oxygen 



120 37 26 



200 ,, 48 ,, 44 per hour. 



The gas is conducted to the disc at ordinary pressure, the oxygen being compressed to 15 times 

 this pressure. 



50.934. Thorium Discs, mounted in platinum, as spare to No. 50,933, 10 mm diameter . . 0. 15. o 



50.935. - - do., 15 mm diameter 1. 0. o 



We recommend the use of thorium discs in lieu of the zirconium discs previously employed, as 

 the life of the former is considerably longer. The used platinum is allowed for if returned. 



50.936. Limelight Burner, Figure, for house gas and oxygen, or for hydrogen and gas, 

 with regulating taps. The lime cylinder can be rotated and adjusted vertically by bevil 



gear. With support 1. 0. 



50.937. --The preceding, giving about 500 metric C. P 1. 5. 



50.938. --idem, as No. 50,936, with regulator tap for quickly regulating the burner without 

 the jet being entirely extinguished and in such manner that the ratio of mixing remains 

 unchanged 1. 10. 



50.939. idem, as No. 50,937, with regulator tap and arrangement for quickly removing 

 the cylinder from the burner and replacing same, and having lateral and vertical ad- 

 justment by rack and pinion \ 3.15. o 



50.940. Limelight Burner (Drummond limelight), Figure, for compressed hydrogen or 

 compressed house-gas, or house-gas taken from the lead, for gasoline, or for ether with 

 compressed oxygen 2. 0. 



For Gasoline Carburettor, etc., see Nos. 50,957 50,959. 



50.941. Lime Cylinders, of Vienna lime, with hole. Price per 12 in case 0. 5. 



50.942. - - do., each one separate in case Each 0. 0. 9 



50.943. Lime Discs, 40 mm diameter Price per 12 in case 0. 5. 



l. 254. 5292, 



r.:t!i9. LT>S. 



