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54 be less, its relative efficiency, or the amount of effectual wealth, must be greater). But if the type of the population be deteriorated by increase of its numbers, we have evidence of poverty in its worst influence; and then, to determine whether the nation in its total may still be justifiably esteemed rich, we must set or weigh, the number of the poor against that of the rich.

To effect which piece of scale-work, it is of course necessary to determine, first, who are poor and who are rich; nor this only, but also how poor and how rich they are. Which will prove a curious thermometrical investigation; for we shall have to do for gold and for silver, what we have done for quicksilver;—determine, namely, their freezing- point, their zero, their temperate and fever-heat points; finally, their vaporescent point, at which riches, sometimes explosively, as lately in America, "make to themselves wings:"—and correspondently, the number of degrees below zero at which poverty, ceasing to brace with any wholesome cold, burns to the bone.