Rising, or falling rent per acre required under prevailing conditions of increased.

1841. London, 1842. — 170, 536 ROUARD DE CARD, Pie-Marie De la Richesse Commerciale ou Prin¬ cipes d'Economie Politique, notam- ment sur les Travaux des Artisans. In: Collec¬ tion des principaux Economistes. V. II. Physiocrates. Partie I. Ed. Daire. Paris, 1846. — 21,789,346 lbs. 1860.-59,166,616 lbs. 1865.-109,734,261 lbs.