248 



REPORT 1880. 



Bray's High Lighting Power ' Special ' Batwings. 



It will be noticed that in some of the nnion-jet burners the lower 

 numbers of these give very poor results with common gas. It is only 

 when Nos. 4 and 5 are reached, and with a consumption of about 5 cubic 

 feet of gas per hour, that good results are obtained. As a rule, all the 

 burners burn to greatest advantage when the pressure of gas is one inch. 



Messrs. Bray & Co.'s Market Burner, intended, as its name implies, for 

 use in the open air, also gives very excellent results from the somewhat 

 large amounts of gas they consume. Two of these gave the following 

 results : — 



Bray's Market Barner — Batwing. 



This firm has also recently manufactured some flat-flame burners of 

 very large size, suitable for street illumination. These are made in an en- 

 larged form of the slit-union pattern, and are called 'standard ' burners. 



