PRINTING METHODS LANTERN SLIDES 



with all other classes of negatives by contact 

 printing or by reduction with a lens. For 

 the latter method a camera like the E. R. & C. 

 (Fig. 3) is most convenient, though work 

 may be done with the improvised apparatus 

 already described for making negatives. This 

 is by far the best way to secure the most sat- 

 isfactory lantern-slides ; and when the negative 

 must be reproduced in whole but is of too 

 large size for their limits, is the only method 

 by which it can be accomplished. It is not 

 necessary to repeat the manipulations already 

 detailed for negative-making, these being pre- 

 cisely the same, excepting that the image is 

 enlarged in the one case and reduced in size 

 in the other. 



Contact prints are made in the same man- 

 ner as those upon paper, but masking out of 

 portions of the negative may be omitted. 

 If the latter has been made with a view to 

 this method of printing it on a lantern-slide, 

 there is nothing further to do than to put 

 the film surfaces of both plates together and 

 expose in a printing-frame to lamp- or gas- 

 light. If only a certain portion of a larger 

 negative be needed, it should be carefully 

 placed in contact with the center of lantern- 

 plate before exposure. Do not make this 



