Note 223-1 — Chapter I

Compare Minard, Notions élémentaires d'Economie politique appliquée aux Travaux publics, 1850, 71 ff. He calls to mind the many strong castles of the age of chivalry, the Roman aqueducts, theaters, etc., which are still in a good state of preservation, but which can be used by no one; so many bridges too narrow for our purposes, and so many roads too steep. The sluices at Dunkirk, made 12.60 metres in width by Vauban, were made 16 meters wider in 1822, and still are too narrow for Atlantic steamships. In England, private individuals have well learned to take all this into account. Compare J. B. Say, Cours pratique, translated by Morstadt, I, 454 ff.