PRICE LIST OF SCIOPTICON APPARATUS. 



The ordinary Sciopticon condenser consists of a 4 j-inch collecting 

 lens and a 4 r %-inch concentrating lens, with a combined back focus 

 of 2 inches. This arrangement seems the best for standard slides 

 and for ordinary use. To substitute a 4-inch condenser adds $5 to 

 the price. It adds $3 to the expense to substitute an objective of 

 10-inch back focus with condenser to match, to be used in the back 

 gallery of a church, for example (see Manual, p. 164). 



1. THE OIL SCIOPTICON, complete, of the latest and most 



careful and finished construction (see Introduction, p. iii) 845 00 



2. Sciopticon Case, for carrying the Instrument in, and for 



standing it upon when in use 3 00 



3. Sciopticon Case (same as No. 2), with the addition of ad- 



justable legs 5 00 



4. Box, for 100 wooden-mounted slides 250 



Box, for 60 wooden-mounted slides 1 50 



5. Double Case, for a pair of dissolving Sciopticons, which, 



with its adjustable legs, becomes the exhibiting stand; 

 black walnut, finely finished and polished 10 00 



6. Dissolver, for a pair of Sciopticons with oil lamps 200 



7. Pair of Sciopticons f like No. 1, with case and dissolver, 



Nos. 5 and 6 (see Manual, p. 40, Fig. 16) 100 00 



8. Screen, 12 feet long, 9 feet wide, without seam, hemmed and 



with loops 3 00 



Screens, rollers and frames of any specified size made 

 to order. 



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