Forced, on the one hand, by the impossibility, existing in the nature of things, of ascertaining and measuring positive values, or of determining, in other words, what a thing _is really worth_, and rendered partially conscious by the obvious hardship and injustice of every unusual or extreme application of the principle that it is either no rule or a bad one, and not guided by the knowledge of any true principle out of the labyrinth of conflicting rights into which the false principle conducts, the world has practically abandoned the attempt to combine Equity with Commerce, and lowered its standard of morality to the inverse statement of the formula, namely, that, "_A thing is worth what it will bring_;" or, in other words, that it is fitting and proper to take for a thing when sold whatever can be got for it. This, then, is what is denominated the Market Value of an article, as distinguished from its actual value. Without being more equitable as a measure of price, it certainly has a great practical advantage over the more decent theoretical statement, in the fact that it _is_ possible to ascertain by experiment how much you can force people, through their necessities, to give. The principle, in this form, measures the price by the degree of _want_ on the part of the purchaser, that is, by what he supposes will prove to be the value or benefit to him of the commodity purchased, in comparison with that of the one with which he parts in the transaction. Hence it becomes immediately and continually the interest of the seller to place the purchaser in a condition of as much want as possible; "to corner" him, as the phrase is in Wall street, and force him to buy at the dearest rate. If he is unable to increase his actual necessity, he resorts to every means of creating an imaginary want by false praises bestowed upon the qualities and uses of his goods. Hence the usages of forestalling the market, of confusing the public knowledge of Supply and Demand, of advertising and puffing worthless commodities, and the like, which constitute the existing commercial system--a system which, in our age, is ripening into putrefaction, and coming to offend the nostrils of good taste no less than the innate sense of right, which, dreadfully vitiating as it is, it has failed wholly to extinguish.