tN AN IMPROVED PII\ 53 



hended, a cesspool should be formed, at as short 

 a distance as may be convenient, to receive the 

 drainage, which can afterwards be carried from 

 it, by a lower drain, to any other place where it 

 may be turned to account. 



The preparation of the interior is to be care- 

 fully attended to. First, by filling it to the height 

 of one foot with any rough material, through 

 which the heat received into the pit, from the 

 linings, will pass freely : nothing can answer 

 better for this purpose than large boughs of 

 trees, laid lengthways of the structure to begin 

 with, and smaller to finish — they should be 

 placed across, or transversely, and cut to the 

 exact width. Upon these lay a little long litter, 

 from fresh dung, to prevent the soil which is to 

 cover them from falling into and filling the 

 interior, which would stop the circulation of air 

 before adverted to ; besides, the want of proper 

 precaution in this respect, would be followed by 

 the falling away of the earth from the roots of 

 the plants to their great injury and possible 



