v. 1 Paper no. 1 History of submarine mining & torpedoes by F. von Ehrenkrook -- Paper no. 2 Extracts from a treatise upon defensive submarine mining by D. Leopoldo Scheldnagel -- Paper no. 3 The beginning of modern submarine warfare by David Bushnell -- Paper no. 4 Report upon certain special processes in photographic printing by Charles E. von Sothen -- Paper no. 5 Observations at the recent transit of venus on December 6, 1882, made at the Willets Point Field Observatory by Henry L. Abbot -- [in v. 1 copy 2 only, in addition to the 5 papers above]: Paper no. 6 Notes on military photography by Eugene Griffin -- v. 2 Paper no. 8 Report upon trials with submarine mines executed jointly by Sweden, Norway and Denmark, 1874-1876 by C.W.E. Oxholm -- Paper no. 9 Improvement of navigable non-tidal rivers by J. Schlichting