462 



then printed on copper in the manner ontlined for zinc plates, 

 nsing a sensitized enamel in place of etching ink and etched in 

 perchloride of iron. The i)late is then bevelled and mounted 

 and made ready for the printer. 



Just two methods have been briefly described and the others 

 are more or less similar. A pencil drawing is reproduced by 



Fio-. 1. 



ri< 



the halftone process, as is also photographs, drawings made 

 with Conti crayon or lithographic crayon on prepared boards, 

 having its surface specially prepared by rolling over an en- 

 graved cylinder, are reproduced without the aid of a Levy 

 screen. The plate reproduced gives in fig. 1 a line engTaving 

 of a pen and ink sketch, in fig. 2 a halftone of a wash 

 drawing, in fig. o a reproduction of a drawing on Ross's 

 stipple board, and in fig. 4 of a pencil sketch made on 



Fig. 2. 



Fio'. 4. 



