[Footnote 150-1: _Flotow_, Anleitung zur Abschätzung der Grundstücke nach Klassen, 1820, 50 ff., estimates the cost of production of a _scheffel_ of rye on land of the first class, at scarcely 1½ thalers; on land of the tenth class, at 3 thalers. In Hanover, it is estimated that about 60 per cent. of the land devoted to gardening and agricultural products produces only from 2 to 4 times the quantity of seed sown; over 35 per cent. from 5 to 8 times, and 4.5 per cent. from 9 to 12 times. (_Marcard_, Zur Beurtheilung des Nat. Wohlstandes im Königreich Hanover, Tab. 3.) In Prussia, the rates of net produce adopted by the central commission in 1862 vary from 3 to 420 silver groschens per _morgen_, in the case of agricultural land; from 6 to 420 in the case of meadow land; in the case of pasturage, from 1 to 360. (_v. Viebahn_, Statist. des Zollvereins, II, 966.) In England, parliamentary investigations (1821) have shown that the best land produces from 32 to 40, and the worst from 8 to 12 bushels per acre of wheat. (Edinburgh Review, XL, 21.) As to the influence of the elevation of land, the royal Saxon commission for the assessment of the value of land, estimated that the net product of an acre _of_ land at a height above the level of the sea, In the case of 2d class land-- Of 500 feet, 55 per cent. Of 800 " 52½ " Of 1600 " 48 " Of 2400 " 43.8 " In the case of 11th class land-- 42.9 per cent. of the gross yield. 39½ " " " " 34 " " " " 26 " " " "]