174 



Projection Apparatus and Accessories. 



No. 50 !)liO 



50960. 1:8, 



50962. 1:3. 



50964. 1:6. 



50967. 1:5. 



50 968. 1 : 6. 



50,960. Retort for generating Oxygen, Figure, constructed of cast iron with wrought 

 iron annex pipe, on tripod, unexplosive as it is lagged with plaster of Paris. Price 



s. d. 



An excellent source of light is obtained with this burner, as pictures 4 metres square can be 

 secured with it. The arrangement is quite simple and safe to manipulate. The pressure is generated 

 by a small pressure pump and should be about 1 atmosphere. The construction .differs from the 

 illustration. 



50.965. Spare Double Mantle 



50.966. Burner portion for spirit incandescent burner 



50.967. Acetylene Lamp, Figure, with sheet iron base 



This lamp generates its own gas, is quite safe, and gives a very clear, brilliant light. 



50.968. Acetylene Lamp, Figure, quite safe, of extraordinary efficiency and easy to work 



The carbide holder takes up to 500 g calcium carbide and lasts about 2 hours for 1 double burner. 



50.969. - - do., larger 



This apparatus takes up to 1 kg carbide and lasts about 4 hours for 1 double burner. 



50.970. Acetylene Gas Burner, giving a first-class light, with reflector and stand and 2 burners 



50.971. - - do., with triple burner with reflector and stand 



50.972. Calcium Carbide Per kg 



Lower prices are quoted for quantities greater than 1 kg. 



50.973. Diapositive Holder with change frame, for plates 13x18 cm 



0. 

 0. 

 1. 



1. 



0. 



0. 9 



3. 



4. 



15. 



5. O 



12. 

 18. 



1. 



1. 5. 



For Hydrogen Generating Apparatus, Rubber Bags 

 and Gasometers, see later parts of this list. 



Cl. 57Hfl. 2fi3, 3280, 

 266, 5188. 



