What economy! In all goldsmiths' shops every effort is made to save all the filings, and the minutest dust of the metals used. The floors are swept, and every thing recoverable is picked up. Yet the imperceptible loss is so valuable to the refiners, that they pay, and pay high, for the scrapings, sweepings, and picking of the work-rooms. A cart load of dirt is taken from a fork-and-spoon manufactory to the refinery, and paid for on the instant; and the money thus received is one of the regular items in the books of the concern. Perhaps it pays the wages of one of the workmen. Another establishment receives two hundred pounds a year for its sweepings. It is worth noting these methods in concerns which are flourishing, and which have been raised to a prosperous condition by pains and care; less flourishing people may be put in the way of similar methods. For instance, how good it would be for farmers if, instead of thinking there is something noble in disregard of trifling economy, they could see the wisdom and beauty of an economy which hurts nobody, but benefits every body! It would do no one any good to throw away these scattered particles of precious metal, while their preservation affords a maintenance to many families. In the same way, the waste of dead leaves, of animal manure, of odds and ends of time, of seed, of space in hedges, in the great majority of farms, does no good, and gives no pleasure to any body; while the same thrift on a farm that we see in a manufactory, would sustain much life, bestow much comfort, narrow no hearts, and expand the enjoyment of very many. We must take care of our eyes when the ovens are opened--judging by the scarlet rays that peep out, here and there, from any small crevice. Prodigious! What a heat it is, when, by the turn of a handle, a door of the furnace is raised! The roasting, or calcining, to get rid of the sulphur, is going on here. The whole inside--walls, roof, embers, and all--are a transparent salmon-color. As a shovel, inserted from the opposite side, stirs and turns the burning mass, the sulphur appears above--a little blue flame, and a great deal of yellow smoke. We feel some of it in our throats. We exclaim about the intensity of the heat, declaring it tremendous. But we are told that it is not so; that, in fact, "it is very cold--that furnace;" which shows us that there is something hotter to come.