126 THE BOOK OF THE LANTERN. 



camera by placing the negative to be copied in an opening 

 in the board, F, marked by a dotted line in the illustra- 

 tion. A couple of laths can then be placed above, so as to 

 rest at one end on the camera, and at the other end on the 

 top of the board, F. These laths will serve as a support 



FIG. 41. 



for a dark cloth, which can be thrown over all. A sloping 

 piece of white cardboard placed behind F (also indicated 

 by a dotted line) will throw reflected light from the sky 

 through the negative. I give no dimensions for this copy- 

 ing machine, for the maker must be guided by the size 

 of his camera, the focus of his lens, and his general 

 requirements. A compound frame for negatives of various 

 sizes, as shown in fig. 41, makes this copying-machine 

 complete. 



