114 Management of Light in Illumination. 



rate chimney ; but from a discovery I have lately made 

 I think it very probable that an important improve- 

 ment will soon be made, by employing one burner 

 with several wicks, instead of several separate burners. 



The most powerful balloon illuminators that have 

 yet been made have had six Argand burners ; their 

 reservoirs are 2 2| inches in -diameter externally, and 

 2\ inches in width ; and their light has been found to 

 be quite sufficient for illuminating very spacious sa- 

 loons in the most complete manner. 



Those most generally used at Paris for lighting 

 drawing-rooms are such as have three ox four burners, 

 which have reservoirs of 17 and 19^ inches in diam- 

 eter. 



All the pendulous dining-room illuminators that 

 have yet been constructed have either three or four 

 burners ; and those used for lighting billiard-rooms 

 have all had four. 



All the table illuminators hitherto made have had 

 sinsfle burners, and their circular reservoirs have had 

 10 inches in diameter externally, and about i inch in 

 width ; but there is no reason why illuminators of this 

 kind should not be constructed with two and even with 

 three burners. When placed on stands of about 24 or 

 26 inches in height, they would be found very con- 

 venient for lighting large dining-tables in dining-rooms 

 which are not high enough to allow a pendulous illu- 

 minator to be properly suspended. 



From what has been said a general idea may be 

 formed of the construction and use of these illumina- 

 tors. I shall now proceed to give particular descrip- 

 tions of their different parts, with full directions for the 

 management of them ; together with such occasional 



