ON THE DEVELOPMENT OF LIGHT FEOSI COAL-GAS. 



251 



Harrison's ' Gas-Light Improver ' is a device similar to that of Scholl 

 applied to iinion-jets. It consists of a small plate of thin iron placed 

 across the top of the union-jet burner, against w^hich the jets of gas im- 

 pinge, thereby checking the force with which they mingle with the air. 

 When the ' Improver ' is applied to a burner with small holes, and when 

 the gas issues under considerable pressure, the light results are better 

 than when no ' Improver ' is applied, btifc it produces no improvement if 

 applied to a good burner of the same kind in which the pressure has been 

 ali-eady checked. 



Of Ai'gand burners, those manufactured by Sugg and Silber have 

 been tested. It will be seen that by carefully controlling and directing 

 the air supply much better results can be obtained than with the Standard 

 Argand used in testing. Each burner was tested with the consumption of 

 gas to which it was best fitted, which was the largest quantity the burner 

 will use without smoking. 



The Silber Argand tried was one marked B. It was used with' chim- 

 neys of various sizes, by means of which various quantities of gas could 

 be consumed. 



Silber's B Argand with various sized chimneys. 



Illuminating power 



14-1 

 210 

 23-8 

 26-2 

 26-6 



The following results wei'e obtained in testing a series of Argand 



New Reading Lamp 

 sepai'ate governor, to 



burners made by Sugg, which are called Sugg's New Reading Lamp 



Argand Burners. Each burner is fitted with 

 control the pressure of gas in the mains : — 



a 



