THE BOOK OF THE LANTERN. 7 



been the result. The same makers have, too, made the 

 lamp distinct and separate from the lantern, so that, if 

 required, it can readily be removed, and a lime-jet used 

 in its stead. The form of lamp referred to is shown in 

 fig. 3, both open for trimming and closed as in use, 

 while a complete mineral oil lantern, of the kind 

 now adopted by most makers, is seen at fig. 4. The 



FIG. 4. 



management of oil lanterns is so simple, really resolving 

 itself into the necessity for keeping the burning wicks at 

 a correct height, and putting the slides or pictures on the 

 stage provided for them, that no more space need be 

 devoted to this portion of my subject. 



The great advantage of using a pair of lanterns is that 

 whilst a picture is being shown by one, another picture is 

 being made ready in the other, and there is no pause or 

 blank screen when the change is made. The so-called dis- 

 solving views, which are produced by making this change 

 slowly, made a great sensation when they were first intro- 



