instruments of trade but a parcel of needles. Those of the master shoemaker are a little, though but a very little, more expensive. Those of the weaver rise a good deal above those of the shoemaker. The far greater part of the capital of all such master artificers, however, is circulated, either in the wages of their workmen, or in the price of their materials, and repaid with a profit by the price of the work.

In other works a much greater fixed capital is required. In a great iron-work, for example, the furnace for melting the ore, the forge, the slitt-mill, are instruments of trade which cannot be erected without a very great expense. In coal-works and mines of every kind, the machinery necessary both for drawing out the water and for other purposes is frequently still more expensive.