THE MAGIC LANTERN. 



work is provided in the case p, by which the charcoal pencil a is 

 kept nearly in contact with the pencil c. The clock-work is so 

 constructed that its motion is governed by the current. 



Fig. 3. 



Mr. Dubosc has contrived the means by which a single electric 

 light will serve to illuminate at the same time two lanterns, 

 placed side by side for exhibition. This is accomplished by 

 placing the light between two reflectors, so inclined that each 

 reflects it in the direction of the axis of one of the lanterns. 



202 



