8CIOPTICON MANUAL. 127 



and now that transparencies are so readily multiplied by 

 photography upon glass, upon mica, or gelatin, by the 

 printing press or the pen, it is destined to find a place 

 in every household; for in it are combined the attrac- 

 tive qualities of beauty, amusement, and instruction. 



" The electric light affords probably the strongest and 

 best illumination for the Magic Lantern; then comes 

 the magnesium light ; but their use is a little trouble- 

 some and rather expensive ; next to these in illuminating 

 power is the oxy-hydrogen or Drummond light. The 

 preparation of the gases and the use of the calcium 

 points involve considerable skill. 



"Need has long been felt for some form of the Magic 

 Lantern having a strong light, but more easily produced 

 than any of those just mentioned; and this has at last 

 been accomplished, after several years' study and experi- 

 ment, by Professor L. J. Marcy. 



" The Sciopticon is the name of his new instrument, 

 and from actual trial we find that it posseses many 

 superior qualities. Its lenses are excellent, and in illu- 

 minating power its light ranks next to the oxy-hydro- 

 gen. The Sciopticon light is produced from ordinary 

 coal oil, by an ingenious arrangement of double flames, 

 intensifying the heat and resulting in a pencil of strong 

 white light. Professor Marcy's instrument is the per- 

 fection of convenience, simplicity, and safety. Any one 

 may successfully work it, and produce the most brilliant 

 pictures upon the screen. It is peculiarly adapted for 

 school purposes and home entertainment. Those who 

 wish to do a good thing for young people should provide 

 one of these instruments. Photographic transparencies 

 of remarkable places, persons, and objects, may now be 

 purchased at small cost, while there is no end to the 

 variety of pictures which may be drawn by hand at 



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