=A MANUAL FOR COURTS-MARTIAL.= Prepared by Lt. Arthur Murray, 1st Artillery, late Acting Judge Advocate-General, U. S. A. Third edition. 18mo, morocco, flap, $1.50 =CAVALRY OUT-POST DUTIES.= By F. De Brack, translated from the French (third edition, 1863) by Major Camillo C. C. Carr, 8th Cavalry, U. S. A. 18mo, morocco, flap, $2.00 =GUNNERY OF NON-COMMISSIONED OFFICERS.= Compiled by Lt. Adelbert Cronkhite, 4th Artillery, with Ballistic Tables, by Capt. James Chester, 3d Artillery, 18mo, morocco, flap, $2.00 =ART OF SUBSISTING ARMIES IN WAR.= By Capt. H. G. Sharpe, U. S. A. 18mo, cloth, $1.25 morocco, $1.50 =THE ARMY OFFICER’S EXAMINER.= By Lt. Col. W. H. Powell, U. S. A. 12mo, cloth, $4.00 =ELEMENTARY NAVAL TACTICS.= By Commander Wm. Bainbridge-Hoff, U. S. N. 8vo, cloth, (in preparation.) FOOTNOTES: [1] In the siege of Strasburg, 1870, a bridge of beer casks was built across the ditch of Lunette No. 52, between nightfall and 10 P. M., September 21st. The ditch was about 66 feet wide and 9 to 10 feet deep. This bridge gave access to the lunette. It was subsequently sunk by the fire of the work and was replaced by a causeway.--Franco-German War, Official Account, Part 2, vol. 1., pp. 88, 89. [2] One of a group of trees may frequently serve for this purpose. [3] The charge for the 5" siege gun is 15 lbs. of powder; 200 rounds = 3,000 lbs.; 2 guns, 6,000 lbs. [4] No special box has been adopted in our service. The English box is 1' 9" × 1' 5½" × 1' 5" outside, metal lined, and holds almost 100 lbs. of made-up cartridges. [5] The crater radius of a mine with L. L. R. of 6' to 12' and a charge of 6,000 lbs. of powder would be about 44 feet (Art. 7, Military Mining). The radius of the mound of earth thrown out would probably be three times this. [6] Quoted from Mahan’s Siege Operations. [7] A shell from a 9" .45 rifled mortar has in experimental firing produced in moderately hard ground a crater 8 feet deep and 19½ feet in diameter. [8] From the unpublished records of three experimental mines fired at Willet’s Point in 1877-83 it would seem that the quantities given in this table are greater than those required if good American powder is used. These mines, in a soil of modified drift, with a L. L. R. of 12 ft. required 1.02 lbs. per cu. yd. = 1 lb. ⅓ oz.; and with a L. L. R. of 17 ft. required 1.15 lbs. per cu. yd. = 1 lb. 2½ oz.