454 THE BOOK OF THE LANDED ESTATE. 



Of course it must be kept in mind that this statement is merely an 

 estimate, but the quantities and prices are, however, taken from an 

 average of works in operation. The first cost could be very much 

 reduced in many cases thus, where building materials are cheap, much 

 less than 100 would erect the necessary buildings ; and the same 

 remarks apply to the cost of the brick tank, and also where the houses 

 in a village are built close together, as in that case one-half the length 

 of main piping might suffice. 



In the estimate of the annual expenditure I give the cost of the 

 labour of a man for three months of the year. On a great many estates 

 the labour need not cost so much as, for example, the work could be 

 done by contract by the village blacksmith, who might be able to attend 

 the gas-work and also carry on his other duties ; and he could do the 

 work by contract at Is. per thousand cubic feet of gas, thus saving 6d. 

 per thousand feet. In a case of this kind, the gas-work would require 

 to be erected contiguous to the smithy. 



Some kinds of coal give a larger quantity of gas from each ton than 

 others ; thus it has been found that 



Cubic feet of gas. 



Newcastle caimel coal will give from each ton . . 9,830 



Wigan coal, . . . . " . . . . . 10,850 



Derbyshire main coal, 9,400 



Wemyss main coal," 10,584 



This statement of the quantity of gas supplied by one ton of the kinds 

 of coal mentioned, is taken from the experiments made by Messrs Barlow 

 & Wright. 



