The Wealth of Nations by Part 2 Chapter 5 Page 37

in British bottoms. It may be presumed that he actually does so upon some particular occasions. It is upon this account, however, that the carrying trade has been supposed peculiarly advantageous to such a country as Great Britain, of which the defence and security depend upon the number of its sailors and shipping.

But the same capital may employ as many sailors and shipping, either in the foreign trade of consumption, or even in the home trade, when carried on by coasting vessels, as it could in the carrying trade. The number of sailors and shipping which any particular capital can employ does not depend upon the nature of the trade, but partly upon the bulk of the goods in proportion to their value, and partly upon the distance of the ports between which they are to be carried; chiefly upon the former of those two