PRODUCED BY DISTILLATION OF TAB AND WATER. 247 



Pee Centage Composition of Tab and Water Gas. 



Olefiaut Gas, or Condensibie Hydro-carbon ... 0*28 



Oxygen 1-86 



Nitrogen 13-83 



Hydrogen 4872 



Light Carburetted Hydrogen 35-31 



100-00 

 All the volumes were reduced to 30 inches bar., and 60 

 deg. Faht. temp. The requisite corrections were also made. 

 I append analyses of gas made at the works in the ordi- 

 nary way from Ince Hall Cannel, and Wood's Cannel (both 

 from Wigan), respectively. 

 IscE Hall (Wigan) Cannel Gas. Produce per ton, 12,440 cubic feet. 



defiant Gas and Condensibie Hydro-carbon.... 921 



Oxygen 0-16 



Nitrogen - ^ 5'37 



Hydrogen 42-33 



Light Carburetted Hydrogen 38-08 



Carbonic Oxide .; 4-84 



99-99 

 Wood's Cannel, Produce about the same. 



Olefiant Gas and Condensibie Hydro- carbon.... 9'Od 



Oxygen, 000 



Nitrogen 0-40 



Hydrogen 38*80 



Light Carburetted Hydrogen 41*60 



Carbonic Oxide 10*10 



99-90 

 The trials which were made at the station, where th^ 

 tar and water gas was prepared, on the illuminating power, 

 as compared with that from cannel, indicated a ratio of 

 about 1 to 3. Consequently the tar and water gas ought to 

 have yielded about three per cent, of olefiant gas to the 

 analysis; whereas the proportion of this gas, on which the 

 light-giving power mainly depends, is, in the gas now under 

 consideration, only about a quarter of one per cent. It is 



