Variation is either free from all obligation to under¬ stand the.

244, 245 Roberts, George (d. 1860) -674 Rodbertus, Johann Karl (1805- 1875)— 8, 139, 778, 801, 853 Roscher, Wilhelm (1817-1894)— 377. Roscoe, Henry Enfield, Sir (1833- 1915)— 15. Russell, John, Lord (1792-1878) — 551, 565 — and the surplus-value supplied by soil A — its definition by bourgeois econ¬ omists of.