Explosives Industry in the United States. —The reports of the United States census for 1900, 1905 and 1909 contain much descriptive and historical besides statistical matter regard ing this industry. From the reports of the census for 1914 it appears that in that year there was produced 7,685,036 pounds of gun powder; 208,316,125 pounds of blasting powder; 3,560,581 pounds of nitroglycerin; 223,000,073 pounds of dynamite and 18,113,601 pounds of permissible explosives. The comparative condi tion of the industry from 1840 to 1914 is shown in the followiniz table: The establishments reported for 1914 were most numerous in the sections where mining or engineering operations were carried on most extensively. Pennsylvania had 33 factories, Ohio 11, Illinois 9, New Jersey 8 West Virginia 7, Oklahoma 6 and California 5. The produc tion is largest in the East. See DYNAMITE; FIRE-DAMP; GUNCOTTON; GUNPOWDER; NITRO GLYCERIN ; MAXIMITE; PICRIC ACID; STABILITE; TRINITROTOLUENE, eT. N. Bibliography,--Abbot, H. L., 'Report Upon Experiments and Investigations to Develop a System of Submarine Mines' •(Washington 1881) ; Berthelot, M., 'Les feu gregois et les origins de la poudre a canon' (Paris 1891); Brunswig, H., 'Explosives,' trans. from German by Munroe and Kibler (New York 1912) ; Chalon P. F., 'Les explosifs modemes) (Paris 1::.); Cundill,P., and J.
Thomson, J. H., 'A Dictionary of Explosives' (London 1895); Daniel, E„ Dictionarydes matieres explosives' (Paris 1902) ; DelCalb, C., 'Manual of Explosives' (Toronto 1900) ; De sortiaux, E., 'Dictionnaire des explosifs)
(Paris 1892) ; Drinker, H. S., 'Tunneling, Ex plosive Compounds and Rock Drills' (New York 1882); Eissler, M., 'A Handbook on Modern ..plosives) (London 1890) ; 'The Modern High Explosives' (New York 1893); Gody, L, matieres explosives' (Namur 18%) ; Guttmann, 0„ 'The Manufacture of Ex plosives' (London 1895) ; Hill, W. N., 'Notes on Certain Explosive Agents' (Boston 1875) ; Macquet, A., (Explosifs de surete) (Paris 1893) ; Marshall, A., 'Explosives, Their Manufacture, Properties, Tests and History' (Philadelphia 1915) ; Mowbray, G. M., 'Tri-nitro-glycerin as Applied in the Hoosac Tunnel) (New York 1874) ; Munroe, Charles E., 'Lectures on Chemistry and Explosives' (Newport 1888); 'Index-to the Literature of Explosives' (Balti more 1893) ; 'Chemicals and Allied Products, Bulletin 92 of the United States Census of 1905' (Washington 1908) and 'Chemicals and Allied Products, Vol. X pp. 527-624, Report of 13th United States Census) (Washington 1911) ; Munroe, C. K, and Chatard, T. M., (Chemicals and Allied Products, Bulletin 210 of 12th United States Census' (Washington 1902) ; Munroe and Hall, 'A Primer on Explosives for Coal Miners, Bulletin 17, United States Bureau of Mines' (Washington 1911); 'A Primer on Explosives for Metal Miners and Quarrymen, Bulletin 80, United States Bureau of Mines' (Washington 1915) •, Nobel, A., 'Les Explosifs modernes) (Paris 1876) •, Walke, W., 'Lectures on Explosives' (New York 1897) ; Wisser, J. P., 'Compressed Gun Cotton for Military Use' (New York 1886).