By General Barnard.
2. Report of the engineer and artillery operations of the army of the Potomac, from its organization to the close of the Peninsular campaign.
By General J. G. Barnard and W. F. Barry.
3. General McClellan's report of operations of the army of the Potomac while under his command.
4. The C. S. A. And the battle of Bull run.
By General Barnard.
5. Records of living officers of the United States Navy.
By Lieutenant Lewis R. Hammersley.
6. Rifled Ordnance. By Lynall Thomas, F. R. S. L.
7. Report of the United States commissioners on munitions of war, exhibited at the Paris Exposition of 1867.
8. Manual for Quatermasters and Commissaries. By Captain R. F. Hunter, U. S. A.
9. Osborn's Hand-book of the United States Navy, from April, 1861, to may, 1864.
10. Manual of military surgeons. By Dr. John Ordronaux.
11. The war in the United States.
By Ferdinand Lecomte, Lieutenant-Colonel Swiss Confederation.
12. Our naval school and naval officers.
ut it is estimated that three times the number of brass guns would have been required to produce the same effect, or maintain such long and rapid firing.
An experimental Armstrong 32-pounder, weighing 26 cwt., with a charge of 6 pounds and an elevation of 33°, sent its projectile 9,153 yards. The range was carefully measured.
Mr. Whitworth states that his little 3-pounder, fired at Southport, attained a range of 9,688 yards. The long experimental 7-inch gun of six tons, designed by Mr. Lynall Thomas, with 25 pounds of powder, propelling a shot of 175 pounds, and fired with an elevation of 37 1/2°, ranged 10,075 yards. There have been several other instances of long ranges, and there would be more but for the general uselessness of firing at distances where no aim can possibly be taken.
The accelerating principle has been again and again suggested, and consists in increasing the velocity of the projectile by the ignition of successive charges of powder during the passage of the