98 THE BOOK OF THE LANTERN. 



in water colour and in oil colour, sometimes, I believe, 

 combining the two methods in one picture ; and his first 

 proceeding was to draw the outline on the glass, in black 

 pigment, with a very fine brush. Those who do not wish 

 to dabble in photography, and who have some artistic taste 

 may still adopt the same plan, and they will find that with 

 a little practice they will be able to draw with a fine brush 

 and with a suitable pigment, as finely as they can on paper 

 with a pen. The Japanese artists, I may mention, do all 

 their work, and even their writing, with a brush, and we 

 all know their pictures are not to be despised. It will 

 be found that such an outline is easier to produce if the 

 glass be first covered with a layer of varnish. Some use 

 a weak solution of gelatine in water, to give the glass the 

 necessary surface for taking the pigment. A solution of 

 sugar has also been recommended for the same purpose. 

 A still easier plan of producing diagrams of line drawings 

 without the aid of photography is to use sheet gelatine, 

 which is sold for the purpose. This gelatine is placed over 

 the engraving or other design which it is wished to copy ; 

 and the lines are traced with a sharp point, such as an 

 etching-needle. Fine black lead is then rubbed over the 

 surface with the top of the .finger, with the result that the 

 black powder lodges in the scratches, but does not adhere 

 to the smooth surface. This plan I look upon merely as a 

 makeshift; but I mention it for what it is worth. 



A method by which far better results can be obtained 

 was published some years ago by the Rev. Dr. Dallinger, 

 the eminent microscopist, who has for a long time used 

 slides produced in the way he describes. His plan is 



