142 SCIOPTICON MANUAL. 



without glass, and varnished, it appears rather better 

 with less cost. 



DECALCOMANIA, OR ENAMEL SLIDES. Impressions made 

 on starched paper and fixed to glass, as above described, 

 will adhere to the varnish when the paper is afterwards 

 wet and pulled off entire. After soaking off the starch, 

 by flowing water and a soft brush, the picture is dried 

 and flowed with ordinary slide varnish. These so-called 

 Enamel Slides are inferior to silver prints, and are sold, 

 both plain and colored, at a cheaper rate. 



Should the paper prints, in good variety, eventually 

 be sold to the public, full directions for transferring them 

 would doubtless also be supplied. On this supposition 

 only, would this truly interesting process promise to 

 become available for amateurs. 



TYPE PRINTING upon glass, except in a poor way with 

 elastic type, is impracticable. Hymns, mottoes, &c., may, 

 however, be printed to advantage upon sheet gelatine, 

 in the small amateur printing-presses now so much in 

 vogue. Plain collodion films, dried upon oiled glass, 

 upon a levelling stand, and peeled off, will take impres- 

 sions perfectly. These films may be mounted between 

 glass plates, in the form of a crystal slide. 



WITH QUARTER-PLATE GLASS prepared as described to 

 receive, like paper, not only colors but pen and pencil 

 drawings, we may copy engravings for the lantern by 

 superposition, or in a camera similar to the one illus- 

 trated by Fig. 31, may show up, as by magic, all that 

 class of illustrations now in vogue as " blackboard ex- 

 ercises;" may suit original designs to the various cir- 

 cumstances of time and place; may transcribe hymns, 

 mottoes, &c., appropriate to each occasion; and so, with 

 small expense and ordinary skill, the Sciopticon becomes 



