As to agriculture, the principles of it were known a long time before the practice of it took place, and it is hardly possible that men, constantly employed in drawing their subsistence from trees and plants, should not have early hit on the means employed by nature for the generation of vegetables; but in all probability it was very late before their industry took a turn that way, either because trees, which with their land and water game supplied them with sufficient food, did not require their attention; or because they did not know the use of corn; or because they had no instruments to cultivate it; or because they were destitute of foresight in regard to future necessities; or in fine, because they wanted means to hinder others from running away with the fruit of their labours. We may believe that on their becoming more industrious they began their agriculture by cultivating with sharp stones and pointed sticks a few pulse or roots about their cabins; and that it was a long time before they knew the method of preparing corn, and were provided with instruments necessary to raise it in large quantities; not to mention the necessity there is, in order to follow this occupation and sow lands, to consent to lose something at present to gain a great deal hereafter; a precaution very foreign to the turn of man's mind in a savage state, in which, as I have already taken notice, he can hardly foresee his wants from morning to night. For this reason the invention of other arts must have been necessary to oblige mankind to apply to that of agriculture. As soon as men were wanted to fuse and forge iron, others were wanted to maintain them. The more hands were employed in manufactures, the fewer hands were left to provide subsistence for all, though the number of mouths to be supplied with food continued the same; and as some required commodities in exchange for their iron, the rest at last found out the method of making iron subservient to the multiplication of commodities. Hence on the one hand husbandry and agriculture, and on the other the art of working metals and of multiplying the uses of them.