The environs of Creil (Oise) and Chteau-Landon (Seine-et-Marne) are noted for their freestone (pierre de taille), which is also abundant at Euville and Lrouville in Meuse; the production of plaster is particularly important in the environs of Paris, of kaolin of fine quality at Yrieix (1-Jaute-Vienne), of hydraulic lime in Ardche (Le Teil), of lime phosphates in the department of Somme, of marble in the departments of HauteGaronne (St Beat), Hautes-Pyrnes (Campan, Sarrancolin), Isre and Pas-de-Calais, and of cement in Pas-de-Calais (vicinity of Boulogne) and Isre (Grenoble).
This he had already begun at Auxonne under the inspiring guidance of the baron du Teil.
General du Teil, younger brother of the baron, had recently published a work, L' Usage de l'artillerie nouvelle; and it is now known that Bonaparte derived from this work and from those of Guibert and Bourcet that leading principle, concentration of effort against one point of the enemy's line, which he had advocated at Toulon and which he everywhere put in force in his campaigns.
Mines of coal, iron, lead and zinc are worked, and the quarries furnish hydraulic lime (Le Teil) and other products.