96 



the pits for the dung is built with 9-inch wall up to 

 the surface, with one course of heuri stone on the top. 

 One inch is cut out for the boards that cover the space 

 allotted for the linings to rest upon : that appearance 

 of litter and dung, which is so offensive in ordinary 

 hotbeds, is thus prevented. The boards that cover 

 the dung are 1 inch thick, by 2 feet 2 inches in breadth. 

 They are of the length of the pit, and have rings at 

 each end for lifting them with. The pits should be 

 well drained, to carry off the under water, and a small 

 grate should be made at the end of them. The kind 



Ground - 





1 I 



Bark 



I 



Dung 













-| 



f. i- 

 2:3 







Xine. 



of matter which is generally employed to fill the pits, 

 is a mixture of new horse and cow dung : sometimes 

 tree-leaves and short grass are used, which do very well, 

 provided they be duly prepared, by throwing them up 

 in a high heap, to remain eight or ten days, that they 

 may ferment to an equal temperature. Let the heap 

 be turned over once in the time. By mixing the 

 parts together they will work kindly when shaken into 

 the pits. The heat will be steady and lasting, at least 

 for a month. If the heat begins to decrease much, 

 let a part, or the whole, of the dung in the back or 



