The work of constructing the plan consists in laying down, day by day, the surveys of the details of the ground, as well as of the traces executed. Five days are allowed for the execution of the topographical work, which precedes the opening of the trenches. The Director Plan is kept close up during the whole duration of the siege. 3d. Itineraries and sketches (comprised in the course of topography.) The Professor of Topography directs the whole of the surveys and the execution of the Director Plan. FIFTH SECTION.--TRACING OF THE WORKS OF ATTACK, AND ACTUAL EXECUTION IN FULL RELIEF OF CERTAIN WORKS. The sub-lieutenants, divided into brigades, trace the works of the siege, under the direction of the officers of the staff, and take part in the superintendence of the works executed in full relief when the exigencies of the service will permit the chief of the Artillery Service and the Colonel of the Regiment of Engineers to place workmen at the disposal of the General Commandant of the School. Six days are appropriated to this work. SIXTH SECTION.--WORK IN THE HALLS OF STUDY. The work in the Halls of Study consists of:-- 1st. A memoir on the sham siege, which memoir must be approved by the General Commandant of the School. 2d. Of a sketch representing one of the works traced or executed in full relief. These works in the Halls are performed during the interval of the attendances devoted to out-of-door work. Two days are appropriated to the preparation of the memoir, and two to the execution of the sketch. This time is included in the eleven days allowed to the sham siege. RECAPITULATION FOR THE ARTILLERY AND ENGINEERS. [KEY] NL No. of Lectures or Conferences. CL Credits for Lectures or Conferences. L Lectures. Cf Conferences. T Total. Q No. of Questions. ----------------------+----+----------------+----+--- | | CL | | Lectures and | +-----+----+-----+ | Conferences. | | | | | | | NL | L | Cf | T | Q | ----------------------+----+-----+----+-----+----+--- By the Professor | | | | | | * of Military Art, | 2 | 3 |....| 3 |} | “ Topography, | 1 | 1½ |....| 1½ |} | “ Permanent | | | | | | Fortification, | 2 | 3 |....| 3 |} | “ Artillery, | 2 | 3 |....| 3 |} 2 | Conferences by the Chief of the Service, | | } of Artillery, | 4 | ... | 6 | 6 |} | } of Engineers, | 4 | ... | 6 | 6 |} | +----+-----+----+-----+----+--- Total, | 15 | 10½ | 12 | 22½ | 2 | ----------------------+----+-----+----+-----+----+--- [* One series of questions by the Chief of the Artillery Service, as to what relates to that arm. One series of questions by the Chief of the Engineer Service, as to what relates to that arm.