L E S L Y HILL. "209 



itfelf. In the progrefs of the heaps, fpread 

 bog earth on fome of the layers, to make it 

 burn quicker, but it will do without. The 

 following paper contains the directions by 

 which Mr. Lefly performed the work. 



" A CLAY KILN. 



This kiln (See the annexed plate) is 20 feet by 

 12, but it may be made longer or fhorter, ac- 

 cording to the quantity you want ; it may al- 

 fo be of any breadth that will allow men from 

 each fide to throw clay to the middle. A. A. 

 are the air-pipes in the middle between the 

 fod walls made, either by cutting a little 

 trench in the ground fix inches deep, and fo 

 many broad, covering them with flat ftones, 

 Hates or bricks, or by ftones laid on the ground 

 at the fame diftance, and covered in the above 

 manner ; the ufe of thefe being to give air to 

 the fire, and make it burn better. The end 

 muft be brought a foot on each fide without 

 the fod walls, and carefully kept from being 

 choaked up with the allies or rubbifh. B. B. 

 are the fod walls, about 10 or 1 2 inches thick; 

 they muft be 3 feet diftance from each other; 

 the ufe of them is to keep fuel and clay tight, 

 and confine the heat. Raife all the fod walls 

 two feet and an half high, except the fides 

 next the wind, fill the fpaces between the walls 

 with turf, furze, wood, or any manner of 

 firing, and thereon lay dry clay 6 or 8 inches 

 thick, very clofe and even, fet fire to it on 

 the windward fide, and then build up that 

 Vol. I. * F fide 



