Lecture 17.—Manufacture of iron and steel and the different kinds of iron.

[THIRD PART.—APPLICATION OF THE WORKINGS OF IRON.]

Lecture 19.—Making of projectiles, carriages for guns and mortars, axle-trees and anchors. Use of cast-iron for artillery. General notions in moulding. Use of wrought-iron and steel. Materials first made use of for the making of projectiles, and in the casting of cannon-balls, &c.

Lecture 20.—On the manufacture of hollow projectiles and the carriages for guns and mortars.

Lecture 21.—On the manufacture of axles and anchors.

[FOURTH PART.—ON THE MANUFACTURE OF SMALL-ARMS.]

Lecture 22.—Preliminary considerations. Assay of metals. Fire-arms, manufacture of gun-barrels, describing the various details.

Lecture 23.—Bayonets, locks, &c.

Lecture 24.—On the making of stocks. Finishing. Rifling small-arms.