198 THE miners' friend. 



have nothing to do but to continue the Length of your Force- 

 Pipe to the Height required. It ought to have a Shed or 

 Covering round it, and to be placed at the lowest place of 

 your Fenn or Bogg, as other Engines designed for that 

 purpose commonly are. 



As for fixing the Engine in Skips, when they may be 

 thought probably useful, I cj^uestion not but we may find 

 conveniency enough for fixing them. 



In Mines and Coal-Fits the manner of fixing the Engines is 

 this ; Tour Pit being sunk, and a Sump or proper Well or 

 bottom Cistern, made to receive the Water coming from the 

 several Feeders or Springs. Supposing an Engine carrying 

 3 J Inch Bore, is to be fixed to deliver Water about seventy 

 foot Tiigli, constant running a full Bore ; in such Case you 

 make a small IJoom in your Shaft or Pit, which, together 

 with your Shaft or Pit is nine foot square every way. As 

 for Example ; Suppose your Shaft six foot by four, take 

 three foot out of one side, and five out of another Perpen- 

 dicular nine foot, making a small Floor or Platform of Boards 

 over that part of the Shaft which goes down to your Sump 

 or bottom Cistern, so you have a compleat Eoom big enough 

 for your Engine, where ten or twelve People may stand on 

 occasion. This Floor may be about eighteen, nineteen, or 

 twenty foot from the Water, at the lowest you ever will 

 draw the Water into the Sump or bottom Cistern If your 

 Ground be loose, 'tis convenient to Line this Poom with Priek ; 

 if Pock, it may support it self. But in this the Miners 

 Judgment must direct him. That the Engine will stand best 

 in the side of the Pit, where most is digged away, you may 

 see in the second Pigure of the Engine, being fixed in a 

 Mine. Your Pipes, &c. must be fixed with Cramps of Iron, 

 Wood, or such Materials as are convenient to the side of 

 the Pit or Shaft, so as to make it stand as firm as the very 

 Shaft it self. Your Furnace must be so contrived, that your 

 Flame take a turn or two round each of the Boylers. which 

 any Bricklayer, used to Furnaces, can do ; it being performed 

 by running a row of Bricks round them both like a Skrew 

 or Worm ; which being contigious to the Wall of the 

 Furnaces, and the Bovlers, makes it as it were a Woi'm 



