CONSTRUCTION OF RETORTS. 



59 



RETORTS. 



THE proper mode of constructing retorts in which the coal is distilled, and 

 the art of applying them, form objects of primary importance in every gas- 

 light establishment. The quantity of gas which can be obtained in any given 

 time from any given quantity of coal the consumption of fuel requisite for 

 the production of that quantity of gas the degree of deterioration to which 

 the distillatory vessel is subjected the equality, in some measure, of the gas 

 itself all depend upon the manufacture being conducted with a due regard to 

 physical principles, and, as the ultimate result of all these circumstances, the 

 rate at which the gas-light can be furnished to the consumer. 



The forms of the retorts used at the present tune are various ; I shall, how- 

 ever, confine my observations to those which are considered the best both for 

 the production of gas, and for their durability. The annexed figures represent 

 sections of a retort, commonly known by the name of a York D. The charge 

 is 3 bushels, or 2^ cwt., which may be drawn at the end of six hours. The 

 dimensions cannot be increased with ceconomy beyond those marked on the 

 drawings. Retorts of smaller dimensions are more usually adopted ; I have 

 shown them, with the manner in which they are set, in an engraving. 



Fiff.9. 



Plan. 



LjU- 



i 2 



