_Lecture_ 4.--Treats of sustaining walls and the probable effects of the pressure of the earth. Of the conditions which must be fulfilled to insure stability. Various formulæ on the subject. Details of construction and on the proper material to be used. _Lecture_ 5.--Refers to the manner of facing masonry. Openings in walls, windows. Partition-walls. _Lecture_ 6.--On cylindrical arches, vaults, key-stones. Formulæ for the calculation of the thickness of piers of an arch or vault. Construction and use of tables for the calculation of the thickness. Construction of arches and vaults in different materials. _Lecture_ 7.--Arches continued, flat arches, plate bands, &c. _Lecture_ 8.--On the woods used in construction. On the influence of the soil on its quality. Characteristics of good wood. Preservation of wood. Proper wood for constructions. _Lecture_ 9.--Flooring. Beams. Girders. Joists. Ceilings. _Lecture_ 10.--Staircases, conditions respecting. Construction of different kinds of staircases, part of masonry, wood, &c.; steps. Construction of landing-places, &c. _Lectures_ 11 and 12.--Roofs in carpentry. Conditions which should be satisfied. Composition of the roof of a building. On the different kinds of roofs. _Lecture_ 13.--On the different ways of joining pieces of wood or timber together. _Lecture_ 14.--On permanent kinds of roofing. Conditions which should be fulfilled by good roofing. Composition of roofing. Tiles, lathing, cut slates, ridge tiles, hollow tiles, Dutch tiles. On slate roofing. Metallic roofing. Metal mostly used. Precautions to be taken with reference to all metal roofing. _Lecture_ 15.--Details relating to inhabited buildings. Cellars. Privies. Drainage. Chimneys; cause of their smoking. Most favorable forms of the flues, pipes. Bake-house, hearth. _Lecture_ 16.--On joinery and locksmiths’ work. Flooring of different kinds. Doors. Camp-beds. Racks and mangers in stables. Shutters. _Lecture_ 17.--Apparatus for heating and for cooking food. Hearth, ash-pan. Grate-flues. Amount of surface to be given to heating apparatus. Furnace of kitchens in barracks. Summary notions on the heating and ventilating of buildings. Calorifiéres with hot air, steam, and hot water. _Lecture_ 18.--Plan of a building. Projections adopted for the representation of a building. Plans, sections, and elevations. Order in which the measurements should be made, and the sketch prepared. Height at which the horizontal plane of projections should pass, &c. SECOND PART.--ARCHITECTURE OF MILITARY BUILDINGS. _Lecture_ 1.--Decoration, without making use of the orders of architecture. Principal conditions relating to decoration. Symmetry, regularity, simplicity, unity, and apparent soliditity. Proper character. Proportions of the façades. Height of the stories. Basements. Horizontal chains or fillets. Vertical chains and pilasters. Proportions of the doors and windows. Arcades and arched windows. Cornices, pediments.