3o6 SOILS AND SOIL PROCESSES. 20. 



The heaps made in this manner are fet on 

 fire with a bough of lighted furze,— or, 

 which is better, a link made of tow dipped 

 in tar and wound round a fmall ftake or other 

 fcick ; — the lighter running along the rows 

 from heap to heap, fetting fire to the 

 kindling. 



Others, having formed the bottom as 

 'above defcribcd, carry up the heap with a 

 chim}iey in the middle, kindling it with a 

 fhovel-full of hot aflies thrown down the 

 chimney. When kindling- materials arc 

 fcarce, this ir.ay be the more eligible method. 



When the fods are under-dry, much Ikill 

 is requifite in forming the heap. The chief 

 art lies in Iceeping it light and hollow within; 

 and, whether it be made with an eye or a 

 chimney^ in having due regard to the wind- 

 ward-fide. A little pradice and proper at- 

 tention will foon fupply the reft. 



If the heaps be made too large at firfi, 

 their own weight crufhes them down, and de- 

 Aroys the neccffary opennefs of the inner 

 fide ; if too fmall, the fire, not being fuffi- 

 ciently confined, flies outward, and fpends 

 itfelf prematurcly- 



Thr 



