112 COLONEL HANGER TO 



when there is no wind. This is, one of 

 uses of the thoselaFffe lanterns, which hansf over the 



Lantern, with o ' o 



hind^thtlamp' front doors of some hotels, and over the 

 doors of gentlemen's halls, which cast so 

 strong and bright a light quite over the 

 street, on the opposite side. The glass 

 lamp which holds the oil must have three 

 tubes to it, with a wick of cotton in each 

 tube. These three cotton wicks, lighte.d, 

 will give a very great light. At the back 

 of the lantern, and behind the lamp, a con- 

 cave piece of very high polished tin or steel, 

 full ten inches in diameter, and quite round, 

 must be fixed. This will collect the rays 

 of light, and reflect them to a very great 

 distance, powerfully. I think those reflect- 

 ing mirrors, at the back of these lanterns, 

 are better, which are made with small pieces 

 of broken looking-glass, as they are more 

 easily kept clean. Before the lamp, in the 

 front, a large magnifying glass, eight or ten 

 inches in diameter, should be fixed, instead 

 of a common piece of glass : this will throw 

 the light much stronger, and at a greater 

 distance. At the bottom of the lantern a 

 gTooye must be made, to receive a stick, 



