MAGIC LANTERNS. 



Fig. 731. 



MAGIC LANTERN. 



A WELL known optical instrument, by means of which 

 small painted figures on the wall of a dark room are 

 magnified at pleasure. The above cut (Fig. 731) repre- 

 sents the common instrument : A small lamp, with a 

 reflector behind it, is placed in a tin lantern, to the front of 

 which is a projecting tube open on both sides ; at the side 



