REPORT ON EXCHANGES. 159 



Circular 6. August 10, 1883. 2 p. 8vo. Paper. 

 Circular 7. August 14, 1883. 2 p. 8vo. Paper. 

 Circular 8. September 8, 1883. 1 p. 8vo. Paper. 

 Circular 9. October 12, 1883. 1 p. 8vo. Paper. 

 Index to general orders for 1882. 56 p. 8vo. Paper. 



Engineer Bureau. 



Professional papers, No. 25. Report upon the practice in Europe with the heavy 

 Armstrong, Woolwich, and Krupp rifled guns. Submitted by the Board of Engi- 

 neers for Fort ilicat ions. 48 p. and 5 pi. 4to. Paper. 



United Slates Hiliiary Academy. 



Annual report, 1883. 6 p. 8vo. Paper. 



The fortifications of to-day. Fire against models of coast batteries and parades. 

 Horizontal and curved fire in defense of coast. 29 p. and pi. 4to. Paper. 



Ordnance Office. 



Notes on the construction of ordnance: 



No. 20. May 8, 1893. The secretion of gas in steel casting. 28 p. 4to. 



Paper. 

 No. 21. Fabrication of cannon in Russia. 42 p. and 5 pi. 4to. Paper. 

 No. 22. The structure of steel. 12 p. and pi. 4to. Paper. 

 Ordnance notes : 



No. 293. Preservation of moisture for seasonable rainfall. 3 p. 4to. Paper. 

 No. 294. The English military power and the Egyptian campaign, 1882. 



13 p. 4to. Paper. 

 No. 295. Researches on the penetration of projectiles. 19 p. 4to. Paper. 

 No. 296. Captain Dutton's report on the tertiary history of the Canon Dis- 

 trict. 3 p. 4to. Paper. 

 No. 297. The cavalryman and his horse. 6 p. 4to. Paper. 

 No. 298. Improved arms rack. 3 p. and 3 pi. 4to. Paper. 

 No. 299. Subjects for a military library. 11 p. and 4to. Paper. 

 No. 300. The French army. 10 p. 4to. Paper. 

 No. 301. Theoretical and practical ballistics. 7 p. 4to. Paper. 

 No. 302. Notes on the embarkation and debarkation of horses and their care 



on board ship. 5 p. 1 pi. 4to. Paper. 

 No. 303. The practice regulations of some European artilleries. 4to. Paper. 

 No. 304. Notes on field artillery. 13 p. 4to. Paper. 

 No. 305. The effects of the increased powers of infantry weapons. 5 p. 



4to. Paper. 

 No. 307. Improved capstan. 5 p. aud 1 pi. 4to. Paper. 

 No. 308. Armor, June 22, 1883. 7 p. 4to. Paper. 

 No. 309. Description of some of the improvements introduced at Frankford 



Arsenal during the present fiscal year. 13 p. and 12 pi. 4to. Paper. 

 No. 310. Report on naval experiments against armor plating. 17 p. aud 



4pl. 4to. Paper. 

 No. 311. Headless shell extractor for Springfield rifle and carbine. 2 p. 4to. 



Paper. 

 No. 312. On the discovery of gunpowder by the Chinese. 4 p. 4to. Paper. 

 No. 313. Ballistic apparatus employed by the French marine artillery. 79 p. 



and 22 pi. 4to. Paper. 

 No. 314. Armor-plate experiments. 2 p. and 1 pi. 4to. Paper. 

 No. 316. The critical condition of the British army. 16 p. lto. Paper. 

 No. 318. A short history of the iron-clad trains. By Lieut. E. Warre-Slade, 



R. N. 4 p. and 1 pi. 4to. Paper. 



