AGRICULTURE WITH CHEMISTRY. 229 



and pradised, the annual consumption of salt, for these 

 l)urposcs only, would at least amount to tons more. 



So that the whole revenue from salt would amount to 

 jT Should this be a greater sum than Government 



■would choose to exacft, they may limit, or do away all 

 the duties now mentioned, excepting the duty of 20s. 

 per ton, as soon as the consumption of Britain for all 

 the different purposes shall, at the duty of 20s. a ton> 

 amount to the net revenue at present colle6ted. 



The tax upon water-borne coals now claims attention. 

 Some remarks have already been made on that subje6t 

 in page 194, but not so fully as the importance of the 

 subje(5t merits. 



The coasting coal trade of Britain is said to employ 

 vessels, on an average, each of tons, navigated 

 by * seamen, most of whom are apprentices ; as 



such the coal trade is reckoned the principal nur- 

 sery for British seamen. There is no coasting or carry- 

 ing trade in the world, of which the cargoes, or articles 



carried, 



* For the reasons already given, this blank, with tlioie which precede ir, aro 

 left to be filled up by the reader. 



