1228 



Megadiascope. 



Fig. 43. No. 9048 a 9648 d. 

 1 :10. 



Fi.U. 40. No. 9657. 1:60. 



Rheostat, for placing on the floor, F i g. 43. s. d. 



List No. 9641 9642 9643 9644 



Working Pressure 65 110 150 220 Volts 



Prices: 6. 0.0 8.10.0 10.10.0 12.10.0 



Rheostat, for 30 amperes, for fixing on the room wall or on to the table of Megadiascope 

 (see Fig. 27, p. 1218) with contact circuit, for use with switchboard No. 9621. 



List No. 9645 9646 9647 9648 



Working Pressure 65 110 150 220 Volts 



Prices : 4. 10. 4. 15. 7. 0. 9. 0. 



do., for placing on the floor (Fig. 43). 



List No. 9648 a 9648 b 9648 c 9648 d 



Working Pressure 65 110 150 220 Volts 



Prices: 5.0.0 5.5.0 7.10.0 9.10.0 



9649. Water Inlet and Waste (F i g. 42), consisting of a water cock for the pipes, and a lead 



funnel on wall bracket for screwed joint for the waste pipe 0. 13. 



g- 



> 



Q 



CO 



3 



CO 



3 



Projection Screens. 



9655 



5x5 in. 

 9.5.0 



Projection Screens, of prepared pure white fabric, for reflected light, Fig. 44, with roller 

 actuated by cord, for firmly fixing to the wall, to the ceiling, or above the cornice of 

 the blackboard frame; 2,5x3 m. 



List No. 9650 9651 9652 9653 9654 



Sizes: 2,5x3 3x3 3,5x3,5 4x4 4,5x4,5 



Prices: 2.10.0 3.0.0 3.15.0 5.5.0 7.0.0 



The screens have a dead white surface, are seamless for a length of 3 in., are very durable, and 

 show up the image well. The rolled-up screen is contained under a cornice with wax strips, thereby pre- 

 venting the access of dust or any damage occuring when not in use. 



9656. NEW! Projection Screen with electric device for rolling up, F i g. 45, with prepared 

 screen 3x3 m. of white surface surrounded by a black border 25 cm. wide . . . . 



This arrangement is worked by an electric motor with worm gearing on wall bracket. The device 

 can be operated from any part of the room, by switching on the motor by a hand reversing switch, which 

 together with the fuses is contained on a marble panel on the wall. The motor is thrown out of gear by 

 an automatic switch when the screen has reached the two extreme positions. 



The device is supplied both for continuous and three-phase current. There is an extra charge of 

 1 if for three-phase current. 



. s. d. 



25. 10. 



Cl. 5210, 282, 281. 



