152 M AN URE-PROCESS. ar. 



than it vanifhes, as through the grate of an 

 open drain. 



In working a marl-pit, the top-foil is thrown 

 back for manure — the remainder of the un- 

 callow thrown to the bottom of the pit, and 

 levelled for the carts to fland upon. When 

 the jam is low, the marl is thrown immediately 

 from it into the carts ; but if it be too high for 

 this operation, piles arc driven in a row a few 

 feet from the face of the jam ; and, as foon as 

 a crack is formed, water is poured into it, 

 more efpecially when the marl is dry and ftub- 

 born ; and by this means many loads are thrown 

 down at once ; either to the bottom of the pit, 

 or on to a plat- form level with the body of the 

 cart ; into which the marl, in this cafe, is 

 thrown with great eafe. Taking up the bot- 

 tom of the jam is the moft difficult part of the 

 operation ; the marl being firft to be cafl up 

 on to the bottom of the pit, and afterwards to 

 be thrown into the carts. But bv thus bring:- 

 ing up the bottom, two valuable things a^e 

 obtained ; — a drain for the water, and a moft 

 convenient receptacle for the next line of un- 

 callow,] 



Th? 



