PUMPING WATERS. 105 



engine-room ; the shafting passing through as small 

 an opening in the wall as can be done with. 



The most suitable fuel to be employed in the 

 " Suction " gas-producer is Welsh anthracite beans, 

 which is recommended on account of its cleanliness in 

 use and freedom from tarry matter ; the generator 

 is designed for the use of this fuel, and the data 

 given in catalogues as to consumption, etc., is 

 based upon its use. There are, however, other fuels 

 which may be utilized in the " Suction " gas-pro- 

 ducer if suitable arrangements be provided for deal- 

 ing with the same. 



Among these may be mentioned Scotch anthracites, 

 which, although containing a larger proportion of 

 ashes and tarry matter, and requiring a little more 

 attention in working, are obtainable at very reason- 

 able prices, and give results which are remarkable in 

 their economy. The producer is well adapted for 

 the use of this poorer quality fuel, and provision is 

 made for separating the tar before the gas enters the 

 cylinder of the engine. 



Gas coke may be utilized as fuel with satisfactory 

 results, but it must be of a well-carbonized quality, 

 washed, and broken into pieces of about in. to 

 ii in. diameter. 



The " Suction " gas-producer may also be modified 

 to use wood charcoal. This material yields gas 

 equal to that from Welsh anthracite. The charcoal 

 must be in pieces like twigs (about -J in. diameter and 

 2 to 3 in. long), thoroughly charred, so as to contain 

 no tarry matter and be free from dust. 



When the gas-producer is required for fuel other 

 than best Welsh anthracite, this fact must be stated 



