(b) Invention. This is the second main condition in the production of commodities; because production is processes, getting something ready to sell and selling it; and Nature stands ever ready with her free agencies to facilitate these processes, just so far as the inventive brain of man can contrive to unite the two. Invention is the marriage of a gratuitous force to an onerous process, and the fruit of that union is an easier way and multiplied utilities. There are some in every considerable community, and more in every community enlarged by the natural association but just now described, who have the knack of contrivance, who find their joy in finding a new power in Nature or some new application of an old power; were it not for unhindered association and free exchange, the individuality of these would be effectually repressed, and they would have to drudge for their daily bread; but the importance of inventors is well understood in every progressive community, and under advanced exchanges their livelihood is guaranteed by those who hope to profit by its results while their work is maturing; and Production rejoices and grows strong and throws out unnumbered hands to make instant use of the new power and the easier processes, in order to multiply commodities in number and variety. As an illustration of all this, the reader will be interested in a brief account of the series of Inventions made in Great Britain during the last third of the eighteenth century, in consequence of which the Cotton Industry was established in that country in such preëminence as has to this day baffled the attempts of all other countries even to approximate it. We catch our first glimpse of Cotton in the pages of Herodotus, who wrote more than 400 years B.C. in relation to India as follows: "_There are trees, which grow wild there, the fruit whereof is a wool exceeding in beauty and goodness that of sheep. The natives make their clothes of this tree-wool._" This passage is interesting, as showing that the first comparison of cotton with wool exhibited their resemblance in whiteness and in _kinkiness_, which latter quality enables them both to be spun into yarn; as showing also, that the Hindoos very early both spun and wove cotton, and then made it into clothes; and as showing lastly, the appropriateness of the original name given to cotton in Europe, namely, "tree-wool," a name by which the Germans still designate it (Baumwolle). If the extreme East furnishes the first notice of cotton, the extreme West follows it next in order. When the Spaniards discovered Central and Southern America in the first quarter of the sixteenth century, they reported that they found the Mexicans clothed in cotton cloth.