The Naval Academy.-Boletin, April-May. The Nicolas general staff school.—Invalide, No. 155. The superior war school.-M. de Art., July; R. de Marina, July 31. WARSHIPS AND TORPEDO BOATS. Comparative data on the principle fleets (illusrtated).-R. Artig., May. The ship building programme.-A. and N. Gaz., July 31. U. S. torpedo boat Porter.-Mar. Rev., July 22. The armor plate question.-Iron Age, July 22. The future of engineering in the Navy?-Iron Age, August 5. Contract trials of the Iowa, Vicksburg, Newport, Annapolis and Nashville.— A. S. N. Eng'rs., August. War-ships building in St. Petersburg.-Invalide, No. 105. A comparison of battleships.-A. and N. Jour., August 14. The Yashima.-Eng., August 6. Report on the repair of the fleet and the creation of a base of operations.— Marine F., July. IO. The value of the English squadrons and of the destroyers.-Marine F., July. Comparison of the battleships Alabama and Prince George.-Génie C., July Trial of the turret carriages for the English battleship Caesar.-R. Maritime, June. The Prince George.-R. Maritime, June. The Pelorus.-R. Maritime, July. On the value of old English battleships if their armament were changed to present requirements.-R. Maritime, July. German navy budget for 1897-8.-R. Maritime, July. The naval weakness of Great Britain (Sir C. W. Dilke).—Cas. Mag., August. The auxiliary machinery of an American warship.-Cas. Mag., August. Specialties of warship design (illustrated).-Cas. Mag., August. Fast torpedo boats (illustrated).—Cas. Mag., August. The problem of warship design.-Cas. Mag., August. Submarine navigation (John P. Holland).-Cas. Mag., August. The docking of the Indiana at Halifax.-Pub. Opin., August 19. The navy estimates.-Eng'ing, July 30. British ship yards.-Mar. Rev., August 5. The attack upon the battleships.-A. and N. Gaz., August 14. MILITARY ENGINEERING. Suspension bridges.- Prof. Papers, Corps of R. E., 1896. On bridging operations with Chitral relief force.-Prof. Papers, Corps of R. E., 1896. Cantilever bridges.—Prof. Papers, Corps of R. E., 1896. Some fundamental propositions relating to the design of frameworks.-Tech. Quart., June. The new suspension bridge between New York and Brooklyn.-Génie C., July 3. Metallic dismountable bridges.-R. Engenheria M., September. Improvised bridges.-R. Engenheria M., October. The effect of temperature changes on arches.-Z. Architekten-Vereines, July 2. Conducting water with constant loss of pressure.-Z. Architekten-Vereines, Construction of magazines for dynamite.-R. Artig., June. Longitude by occultations of stars.-R. Maritt., July. The Schmalkalder compass.-R. Artig., July-August. Photographic apparatus (very rapid) for military reconnoissance.-R. Ma ritt., August-September. MISCELLANEOUS. Experiments with a new method of heating and ventilation. A. S. Civil Engrs., June. Transactions The Japanese press on Hawaiian annexation.-Pub. Opin., July 29. The amount and properties of the proteids of the maize kernel.-J. Chem. S., July. Scientific work of the Boston party on the sixth Peary expedition to Greenland. Tech. Quart., June. The United States and Japan.-A. and N. Jour., August 8. Emergency ration report.-A. and N. Reg., July 17. The chemistry of food adulteration.—Frank. Inst., August. The microbe of yellow fever.-Pub. Opin., August 5. Results of Captain Brown's emergency march.—A. and N. Jour., July 17. Practical education.-Rev. of Rev., August. Swimming schools in the army.-Razv., No. 348. Recent progress in optics,-Smithsonian Report, 1895. The atmosphere in relation to human life and health. - Smithsonian Report, 1895. The air of towns. -Smithsonian Report, 1895. The Red Cross Society in Europe. - Invalide, No. 156. The value of a bacteriological examination of water from a sanitary point of view.-J. Chem. S., August. The carbonic acid in the air of barracks, etc.-Vereine, 2. Infantry caisson, model 1894.-R. M. Suisse, March 15. Coefficient of resistance of a rolling wheel.-R. Artig., December. A boat and spring bed combined.-Yacht, June 12. Experiments with dynamite.-M. de Art., May. The re-shoeing of horses.—S. Zeitschrift, June. Large explosions and their radii of danger.-Eng'ing., August 13. A great hydraulic laboratory.-Proceedings A. S. Civil Eng'rs., August. The horse's foot.—Jour. U. S. Cavalry, June. Military Pigeons.-R. Artig., May. Kitchen ranges for barracks (well illustrated).-R. Artig., July-August. (See table page 91, Journal U.S. Artillery, Volume VIII, No. 1.) A Test of Krupp Armor.-In a recent reference made in The Iron Age to a test of a Krupp armor plate, the statement was printed that the plate in question was through cracked at the fifth shot. This was a mistake, since there were only surface cracks, quite a common appearance on surface hardened plates. Besides, the penetration of round five was only 4.1 inches, and not 7.7 inches as stated. It may be noted also that after the fifth round four additional rounds with 8-inch and 6-inch armor piercing shells were fired at the tapered part of the plate without cracking it. The point is made that the effect of round five does not give a correct idea of the power of resistance of the plate, since the points of impact of rounds one and five were too close together, their centers being only 16 incbes apart. This part of the plate, therefore, had certainly lost the better part of its power of resistance before being struck by round five. The other points of impact were very close together, being about two feet apart from each other and from the edge of the plate. The Iron Age, July 1, 1897. (See table page 91, Journal U.S. Artillery, Volume VIII, No. 1.) A Test of Krupp Armor.-In a recent reference made in The Iron Age to a test of a Krupp armor plate, the statement was printed that the plate in question was through cracked at the fifth shot. This was a mistake, since there were only surface cracks, quite a common appearance on surface hardened plates. Besides, the penetration of round five was only 4.1 inches, and not 7.7 inches as stated. It may be noted also that after the fifth round four additional rounds with 8-inch and 6-inch armor piercing shells were fired at the tapered part of the plate without cracking it. The point is made that the effect of round five does not give a correct idea of the power of resistance of the plate, since the points of impact of rounds one and five were too close together, their centers being only 16 incbes apart. This part of the plate, therefore, had certainly lost the better part of its power of resistance before being struck by round five. The other points of impact were very close together, being about two feet apart from each other and from the edge of the plate. The Iron Age, July 1, 1897. |