Includes: report of experiments made at Governor's Island by Brig. Gen. Jacob Morton, 1805; report of Brigadier-General John Newton Upon Removal of Flood Rock, 1885; Annual Report of the Chief of Engineers, 1886, The Earth Wave at the Destruction of Flood Rock in Hell Gate, East River, New York, with photographs; Dallas Texas Explosion - Statement of Amounts expended on a/c of above, also A. O. Fay's letter, with additional expenses; Hazard and Du Pont; (note: These magazines struck by lightning and totally destroyed with contents - verbal. O. Fay, 18 May 1891); report on inspection of J. S. Miller Powder Mills, White Haven, Pennsylvania, 1891-1899; Process of Manufacturing powder in the first du Pont mill by William L. Scott, 1918; Black Gunpowder by E. L. Prickett, 1919; Sporting and Military Black Powder by William May, circa 1920; and "Dr. James H. Morgan relates the following interesting account of the Old Conestoga Powder Wagons", 3 copies, undated.