Plate, No. 1, 8 “ 1st Section: Fortifications on level ground.--Principal graphical constructions of the front on level ground according to particular data given to each Student 1/1000 Plate, No. 2, 28 “ Complete projection of the whole of the visible and underground parts of the same front, 1/1000 Three profiles of the front, 1/500 Memoir, 6 “ Description of the principles of the Fortification, with a detailed discussion of the dispositions adopted in the particular case treated by the Students. Plate 3, 20 “ 2d Section: Fortification on hilly ground.--Drawing of the ideal fortress and of its Tête-du-pont, with the interior entrenchments, inundation, sluices, and all necessary details to enable a proper comprehension to be had of the action of the water. Drawing complete of one of the fronts of the place and its outworks, described by a particular programme. Defilement of all the works of this front and of the masonry of one of its faces, 1/5000 Memoir, 3 “ On the situation of the fortification; description of the imaginary fortress, and of the management of the water; explanation of the operations of defilement drawn on Plate 3. Plate 4, (Artillerie.) 10 “ Plan and profile of a full revetment of the escarp with its counterforts, 1/200 Plan, profiles, and elevation of a revetment “en décharge.” 1/200 Detail of a gallery and small chamber of a mine, of its tamping and mode of firing, 1/50 Plate 4, (Engineers.) 20 “ Detailed project of one of the parts of the front of fortification defiladed in Plate 3. Plans at different height; disposition of the galleries and small chambers of mines required for blowing up the whole of the ground between two listening galleries. 1/250 Plate 5, 10 “ Sections and elevations of the preceding project. Foundations, coping of vaults, dressing of cut stones, &c., 1/125 Detail of a small gallery and chamber of a mine, comprised in the dispositions of Plate 4. Tamping and mode of firing. Avant, 3 “ Abstractions of measurement of a part of the preceding project, .... Plate 6, 11 “ Study of the alterations in the earth of the same part of the projects, representing the four principal periods of the work, by a plan and section, with an elevation of the 4th period, 1/250 Memoir, 2 “ General theory of the removal of earth. Application to a particular project, .... Register, 3 “ Register of the removal of earth as represented in Plate 6. Estimate, 1 “ Estimate of the part of the project to which the abstraction of measurements has been applied. 3d Section: Projection of the improvement of an existing fortified place. Plate 7, 30 “ Complete projection of the project for improving an existing fortified place, 1/1000