336 Mr. Mallet on the Physical Conditions 



real merits, and might be possibly improved. It appears to have been produced about 

 1716 ; and the notice adds, that "such pieces were made by the author, at the Port de 

 Marli, and some are in the Arsenal of Paris, in 1735." 



The wrought-iron cannon made at Ocona, in 1744, stand well the proofs to which they 

 are subjected. These cannon are now (1832) in the Museum of Paris. They are of calibers 

 of 3A and 2i inches; 5 ft. lin. long. One of them weighs 210 lbs. 



1747. Senner fabricates cannon of wrought-iron, the bores of which were grooved, and 

 the bottom of the bore movable. 



1753. There is at the Arsenal of Paris a handsome wrought-iron 12-pounder, the manu- 

 facture of Gentin, weighing IGOO lbs. It was made solid, and bored out. 



1758. Hannoteau, in Paris, proposes wrought-iron cannon, with the inieiior of the chase 

 lined with copper or bronze. 



1760. Chev. D'Arcy (" Theor. d'Artillerie") proposes cannon oi wrought-iron square 

 rods, wrapped round and brazed together. 



1764. There are at the Arsenal of Paris three wrought-iron cannon — one 12, and two 

 8-pounders. These pieces, made on maundrells, are composed of longitudinal bars, covered 

 with rings, the whole welded together. 



1765. Anciola caused to be made at Paguloga, in Spain, three wrought-iron pieces, 

 one 4-pounder, long, one 4-pounder, short, and one 8-pounder. Bars of iron were used, 

 of 1| inches in thickness. These pieces, forged solid, and afterwards bored and turned, 

 sustained without injury the proof-firing, with charges of two-thirds of the weight, and the 

 whole weight of the ball. A royal order directed the fabrication, in the same manner, of 

 two 24-pounder cannon (weight, 20 quintals, 4400 lbs. English), two 16-pounders (19 

 quintals, 4180 lbs. English), and two 12-pounders (16 quintals, 3520 lbs. English). Some 

 of the pieces were cracked in the proof In one of these a new breech was put, and it 

 stood proof. They were forged by hand. 



There was at Paris, in 1830, a very handsome wrought-iron mortar, 6i inches bore, 

 weighing 220 lbs., and made in 1775 at Madrid, by Ortega. The collection at Woolwich 

 contains a German wrought piece of 1775. 



Texier de Norbec saw at St. Sebastian, in 1780, wrought-iron cannon proved at that 

 placer, in 1766, and which had remained since that time under an open shed. They were, 

 he says, but little affected by rust. 



1782. In France much interest is taken in wrought-iron pieces. Langevin makes two 

 4-pounders to the order of Marshal de Castries; and Bradelle, of Bordeaux, made many 

 for the owners of privateers, at the- rate of twenty-five sous per pound. 



1792. The celebrated Monge, in his large work, "Description de I'Art de Fabriquer 

 les Canons," strongly advocates the advantages of substituting wrought-iron for bronze; 

 and adds, that the trials made in Prance at the forges of Guerigne, and at those of Cebada, 

 in New Castile, had been crowned with success. 



