MISCELLANEOUS. 335 



laying your butterfly on the paper, cut off the 

 body close to the wings, and throwing it away, lay 

 the paper on a smooth board, with the fly upwards ; 

 and laying another paper over that, put the whole 

 preparation into a screw press, and screw it down 

 very hard, or otherwise press it, letting it remain 

 under that pressure for half an hour. Afterwards 

 take off the wings of the butterfly, and you will 

 find a perfect impression of them, with all their 

 various colours marked distinctly, remaining on 

 the paper. When this is done, draw between the 

 wings of your impression the body of the butterfly, 

 and colour it after the insect itself. 



To lay Mezzotinto Prints upon Glass. 



Take what mezzotinto print you please ; cut 

 off the margin, and lay it flat in a dish of clear hot 

 water;" let it remain on the surface till it sinks. 

 When you take it out, be careful not to break it, 

 and press it betwixt clean cloths or papers, so that 

 no water may appear on the surface, but the print 

 be quite damp : then lay it, face uppermost, on a 

 flat table ; have ready a plate of pure crown glass, 

 free from all spots or scratches ; lay some Venice 

 turpentine all over one side of it with a soft brush, 

 and hold it to the fire a little, to make it run quite 

 equal and thin ; then let it fall gently on the print. 

 Press it down, that the turpentine may stick to the 

 print ; and also press the print with your fingers, 

 from the middle to the edges of the glass, so that 

 no blisters may remain. Wet your print now with 

 a soft cloth, and rub it gently with your finger, and 

 the paper will peel off, leaving only the impression 



