SCIOPTICON MANUAL. 



143 



readily available, without the purchase of a large assort- 

 ment of slides. 





Fig. 32. 



The cut (Fig. 32) shows the exact size and shape of 

 the transparency, mat, glass, and the binding of the 

 Woodbury (photo-relief) magic lantern elide, of the 

 colored crystal slide, and of such as are made according 

 to the directions given in this chapter. 



Pen and pencil drawings would require only Nos. 7, 

 8, 9, 10, 19, 20, and 21, of the materials enumerated on 

 page 138 ; or, simpler still, the glass may be obtained, 

 ready prepared, for 75 cents a dozen, the drawings made 

 with any quite black ink and a fine pen, and shown 

 without glass cover, mat, or binding. 



