188 THE JIINERS FRIEND. 



L. The great Boyler. 



M. The Skreiv with the Regulator. 



N. a small Cock and Pipe going half way down the great 



Boyler. 

 0. 0. Steam-Pipes, one end' of each Skrew to the Regulator, 



and the other ends to the Receivers. 

 P.P. The Vessels called Receivers, 



a 2_ 



Q. The Skrews which bring on the Pipes and Clacks in 



the Front of the Engine. 

 R.R.R.R'N° l. 2. 3. 4. Valves or Clack of Brass, with Skrews 



to open and come at them upon occasion. 

 S. The Porce-Pipe. 

 T. The Sucking-Pipe. 

 F. a square Frame of Wood, with Moles round its Bottom 



in the Water. 

 X a Cistern with a Buy-Cock coming from the Force- Pipe. 

 Y. a Cock and Pipe coming from the bottom of the said 



Cistern. 

 Z The Handle of the Regulator. 



Chap. I. 

 THE MANNER OF WORKING THE ENGINE. 



The first thing is to fix the Engine in a good Double 

 Furnace, so contrived that the Flame of your Fire may 

 Circulate round, and Incompass your two Boylers to the 

 best advantage, as you do Coppers for brewing. Before 

 you make any Fire, unskrew G and N, being the two small 

 Gauge Pipes and Cocks belonging to the two Boylers. And 

 at the holes fill L the Great Boyler two thirds full of Water, 

 and B the Small Boyler quite full. Then shrew in the said 

 Pipes again as fast and tight as possible Then Light the 

 Fire at -5 N° 1. When the Water in L hoyls, the Handle of 

 the Regulator mai'k'd Z, must be thrust from you as far as 

 'twill go, which makes all the Steam rising from the Water 

 in Z, pass with irrisistible Force through N° 1 . into P N° 1 . 

 pushing out all the Air before it, through the Clack P N° 1 . 

 making a Noise as it goes. And when all is gone out, the 

 Bottom of the Vessel P N° 1 . will be very hot. Then pull the 



