If you go to Suffolk to buy butter, you refuse the butter of the first make, because that is not the best, but you bargain for 'the right rowing butter,' which is the butter that is made when the cows are turned into the grounds where the grass has been mowed, and the hay carried off, and grown again: and so in many other cases.

These things demonstrate the advantages there are to a tradesman, in his being thoroughly informed of the terms of art, and the peculiarities belonging to every particular business, which, therefore, I call the language of trade.
As a merchant should understand all languages, at least the languages of those countries which he trades to, or corresponds with, and the customs and usages of those countries as to their commerce, so an English tradesman ought to understand all the languages of trade, within the circumference of his own country, at least, and particularly of such as he may, by any of the consequences of his commerce, come to be any way concerned with.
Especially, it is his business to acquaint himself with the terms and trading style, as I call it, of those trades which he buys of, as to those he sells to; supposing he sells to those who sell again, it is their business to understand him, not his to understand them: and if he finds they do not understand him, he will not fail to make their ignorance be his advantage, unless he is honester and more conscientious in his dealings than most of the tradesmen of this age seem to be.
FOOTNOTES: [9] [_Sammel_ is a term of art the brickmakers use for those bricks which are not well burnt, and which generally look of a pale red colour, and as fair as the other, but are soft.].