252 



REPORT — 1880. 



Sugg's New Reading Lamp Argand Bui-ners. 



Sugg lias recently pi-oduced some very large Argand burners for street 

 lighting purposes. These are made with concentric rings, from ^vhich the 

 gas is suppUed. Two of these, one a hundred-candle burner, and the other 

 a two hundred-caudle burner, were tested with 16-candle gas, with the 



followins: results 



Sugg's Large Street Argand Burners. 



Although a greater amount of light can be obtained from the burning 

 of common gas in ordinary quantities in good Argand burners than can 

 be obtained by the use of ilat-flame bm-ners, yet there are many reasons 

 for thinking that the latter are better adapted for general use, and that 

 they will continue to be much more largely used for general lighting pur- 

 poses than Argands. In the first place, the first cost of the Argand 

 burner is necessarily very much gi'eater. The cost of maintenance — 

 replacing broken chimneys, &c. — is also very much greater. Then, again, 

 the cleaning of the chimneys is troublesome. They must be kept clean, or 

 a loss of light will result. A chimney which had been in constant use for 

 thirty hours, burning Newcastle gas, was so dimmed by the deposition of 

 what is probably sulphate of ammonia on the inside, that half a candle 

 of the light was intercepted. If, from the irregularities of the pressure 

 of gas in the main or from other cause, a larger amount of gas is passed 

 through the burner than can be thoroughly consumed, the flame gives off 

 dense smoke, which, if not at once stopped, produces very disastrous 

 effects in rooms. Hence it is almost absolutely necessary to use a special 

 governor to each burner, Avhich adds still more to the cost. It is only 

 -when the consumption of gas for which the Argand bui*ner is specially 



