Xll INTRODUCTION. 



compact and convenient arrangement the advantages of 

 the three ordinary separate instruments. 



The clamp acts by a simple turn of an outside lever, to 

 hold firmly the base of the jet without interfering with 

 raising or lowering it. 



The Shell prevents the escape of light with the 

 slightest surface and bulk for retaining the heat. It is 

 provided with side fender near the light, and is arranged 

 with open top and free ventilation. The direct light can- 

 iiot be seen from, behind, but its comparative intensity and 

 distance from the jet are distinctly seen without harm to 

 the eyes, as reflected from the surface of the condenser. 

 Its compactness brings it so completely under the hand of 

 the operator, standing behind, as to make him independent 

 of an assistant. 



The Automatic Cut-off. All unnatural condi- 

 tions and movements detract from that seeming reality 

 which is so characteristic of projected pictures. Alas for 

 seeming distance and solidity, when the changing of the 

 slides suddenly contracts the scenes into dancing shadows 

 on a screen. Even dissolving views, by which the change 

 is effected so charmingly, present many incongruities at 

 war with nature. 



The Lime-light Sciopticon, however, with its automatic 

 cut-off, shows no commotion nor commingling, to weaken 

 the stereoscopic effect, nor any blank of appreciable dura- 

 tion, for suspense. It is more in consonance with nature, 

 and is less hurtful to sight. It seems like closing the eyes 

 on one scene and instantly opening them on another. Its 

 operation is natural and agreeable, and we have its advan- 

 tages in a single instrument, which is comparatively inex- 

 pensive. See Manual, pp. 167-170. 



