CHAPTER I 



THE MAGIC LANTERN WITH DIRECT CURRENT ARC 

 LAMP AND ITS USE. 



1. Apparatus and Material for Chapter I: 



Suitable projection room with screen (Ch. XII) ; Magic lantern 

 ( 3~ I 9) I Arc lamp, automatic or hand-feed, with fine adjustments, 

 lamp-house and wiring for current up to 25 amperes (fig. 3); 

 Cored carbons adapted to the current ( 7 53 a) ; Rheostat; Lantern 

 table (Ch. XII); Double-pole, knife switch ( 8); Ammeter ( 7); 

 Incandescent lamp or flashlight ( 14-15); Gloves with asbestos 

 patches ( 27); Lantern slides; Opera-glasses ( 38); Testing 

 incandescent lamp ( 6 1 , fig, 21); Fuses ; Extra condenser lenses to 

 replace cracked ones ( 94) ; Screw driver and pliers. 



2. Historical Summary and Works of Reference: 



For a historical summary of the invention and use of the Magic 

 Lantern, see the Appendix. 



The reader will find many good hints in the following works on 

 Projection. For the full titles, see the Bibliography. 



R. C. Bayley. Modern Magic Lanterns and their Management. 



H. Fourtier. La Pratique des Projections. 



Hassack and Rosenberg. Die Projektionsapparate. 



T. C. Hepworth. The Book of the Lantern. 



R. Neuhauss. Lehrbuch der Projektion. 



C. G. Norton. The Lantern and How to Use It. 



F. P. Wimmer. Praxis der Makro und Mikro-Projektion. 



Lewis Wright. Optical Projection. 



The latest information and many useful hints may be found in 

 the catalogues of the manufacturers (see Appendix). 



MAGIC LANTERN 



3. The Magic Lantern as the standard for projection appara- 

 tus. The magic lantern may be taken as the standard example of 

 projection apparatus, for it is in the most common use and is the 

 simplest instrument for image projection. 



