GAS, COAL 



577 



4 Next to England, tho finest specimens of fire-clay goods on a largo scale are from 

 Belgium : tho gas-retort sent from France is not remarkable for excellence.' 

 Fig. 1035 is an elevation of Mr. Wright's plan for a range of long clay retorts. 

 Fig. 1036 shows the plans and sections of the setting for these retorts. 



1036 



Ketorts, or rather ovens, of fire-brick, the invention of Mr. Spinney, have been long 

 used successfully at Exeter, Cheltenham, and other places. They appear to be very 

 durable, and to require little outlay for repairs, but a very large expenditure of fuel is 

 required for heating them. They are of the D shape, 7 feet long, 3 feet 2 inches 

 wide, and 14 inches high at the crown of the arch, Each retort receives a charge of 



Voji. II. J> P 



