Should this root ever become in any part of Europe, like rice in some rice countries, the common and favourite vegetable food of the people, so as to occupy the same proportion of the lands in tillage, which wheat and other sorts of grain for human food do at present, the same quantity of cultivated land would maintain a much greater number of people; and the labourers being generally fed with potatoes, a greater surplus would remain after replacing all the stock, and maintaining all the labour employed in cultivation.