MAGIC LANTERN WITH PETROLEUM LAMP [Cn. V 



FIG. 65. MARCY'S MAGIC LANTERN OR "SCIOPTICON" WITH A 

 MULTIPLE-WICK, PETROLEUM LAMP. 



(From Dolbear's Art of Projecting). 



a-b. c-d The lenses of the projection objective. 



p-q The condenser lenses. 



Z S The oil reservoir of the lamp. 



E The flames of the lamp with their edges toward the condenser. 



G-G Two glass plates at opposite ends of the lamp-house to allow the light 

 to pass to the condenser, and so that the reflector II can return the backward 

 extending light. 



C I J The chimney and ventilator of the lamp-house. 



W W At the right, the milled heads for turning the lamp-wicks up or down. 



There is a common reservoir and a common chimney, but each 

 wick has a separate burner and a separate mechanism for raising 

 and lowering the wick. 



197. Chimney and reflector. There is a common chimney. 

 This is usually of metal with a window on opposite sides, and with 

 either a telescoping extension or a segment which can be put on top 



