JAX.} MARLING. 41 



M lances ; and I am much inclined to think that if 

 - l we had workmen used to the operation, and 

 <w handy at it, like those employed in navigations, 

 " that this method would he of all others the 

 " cheapest, especially on heavier soils. But by 

 " far the greatest part I have done by tumbrils, the 

 t; expence of which put out is 5d. per yard for 

 " team, and 2^d. a yard for labour ; this, with pay- 

 " ing for laying picks, wedges, &c. also for stones 

 " that rise, increase the whole expence to 8d. per 

 tc yard, which is at least a halfpenny per yard cheaper 

 " than I can do it with my own teams ; the reason 

 " of which is, that the man who contracts with me 

 < drives his own horses, and looks after them. At 

 " 8fd. per yard, MO,OOO yards have cost rne 4, Q58l. 

 41 excepting the small proportion hired at a half- 

 " penny a yard lower. 



" I come now to mention a few circum- 

 <i stances, which I hope may " tend to render 

 " this paper useful to others not having the 

 * c experience which I have acquired: I shall use 

 61 but few words, but they shall be founded on 

 " positive experiment or attentive observation. 



66 Clay is much to be preferred to marie on these 

 <{ sandy soils, some of which are loose, poor, and 

 " even a black sand. By clay is to be understood 

 " a grey clayey loam, some of it brick earth, and 

 fc all has with vinegar a small effervescence. 

 c ' Marie is a white, greasy, chalky substance, that 

 *' effervesces strongly with acids : I make a univer- 



" sal 



