Concentration of French iron industry delayed by use of charcoal and inadequate means of transportation, 318. — Construction of railroads stimulates iron industry, 320. — Regions where iron industry developed most: Lorraine; Nord and Pas de Calais; Centre; Upper Marne — its transportation and fuel problems, 321. — Comments of Inspector General of Mines on cutlery industry of Upper Marne, 327. — His comments on iron tariff for Upper Marne, 328. — Development of iron industry of Upper Marne after 1860, 330. — Its resources in 1912, 332. — Duties in tariff of 1860 on iron, 333. — French imports of iron 1827–75, 334. — Chevalier-Cobden Treaty of 1860 was not chief cause of reorganization of French iron industry, 335. — Objects Chevalier hoped to achieve through this treaty, 337. — His success, 337.