RICOCHET FIRING.

1. When adopted in the field, the guns should seldom be elevated above 3 degrees, as the objects fired at are generally cavalry and infantry, and the lower the angle the longer will the shot preserve its force, and have effect.

2. In the ricochet of a fortification of any kind, the elevation should seldom exceed 10 degrees to throw the shot over the parapet a little higher than the level of the battery; and, on the whole, the best elevation to enfilade a work is from 6 to 9 degrees, measured above the crest of the parapet with corresponding charges.

3. The charge, and elevation being known for any range, when the gun and parapet are on the same level, the same charge, and elevation may be used so long as the difference of level does not exceed one-twentieth of the horizontal distance between them, the elevation being given by the tangent scale, and the gun laid at the parapet, whether above or below its own level.

Ricochet Practice with Iron Ordnance.

	Round Shot.

	68 Pr. Carronade.*		24 Pr. Gun, 9 Feet.		18 Pr. Gun, 8 Feet.		12 Pr. Gun, 8½ Feet.

Range in yards.	Charge.	Eleva- tion.	Charge.	Eleva- tion.	Charge.	Eleva- tion.	Charge.	Eleva- tion.

	lb. oz.	deg.	lb. oz.	deg.	lb. oz.	deg.	lb. oz.	deg.
400			12	6¼	9	6½	8	4½
			10	7¾			6	6½
			8	11
600	1 12	7	6	6	1	5¼	12	4¾
	1 8	8¾	1 8	4	12	7	10	6
			1	6½			8	7¾
800			2	3¾	1 8	4¼	1	4½
			1 8	5½	1	7	12	6½

* Note.—When Shells are fired from the 68 Pounder Carronade, the Elevation must be decreased about half a degree.

	Part 2 of 2

	Common Shell.

	10-inch Howitzer Shell, 92 lb.		8-inch Howitzer Shell, 46 lb.		24 Pr. Howitzer Shell, 16 lb.

Range in yards.	Charge.	Eleva- tion.	Charge.	Eleva- tion.	Charge.	Eleva- tion.

	lb. oz.	deg.	lb. oz.	deg.	lb. oz.	deg.
400	2 8	6¼	1 8	6	9	4¾
	2	8½	1	9½	6	7½
600	3	6½	1 8	8¼	1	4¾
	2 8	8¼	1 4	10	12	5¼
					9	7½
800	4	6¼	2 8	6¼
	3 8	7½	2	6½