Such is a general outline of the plan and object of the school. We may add that, besides its military staff, it employs no less than thirty-nine professors and teachers; that it has four boards of management, and that ten scientific men unconnected with the school, and amongst the most distinguished in France, conduct its examinations. The magnitude of this establishment for teaching may be estimated by the fact, that the number of pupils rarely exceeds three hundred and fifty, and is often much less. A fuller enumeration of these bodies will complete our present sketch. I. The military establishment consists of:-- The Commandant, a General Officer, usually of the Artillery or the Engineers, at present a General of Artillery. A Second in Command, a Colonel or Lieutenant-Colonel, chosen from former pupils of the school; at present a Colonel of Engineers. Three Captains of Artillery and Three Captains of Engineers, as Inspectors of Studies, chosen also from former pupils of the school. Six Adjutants (_adjoints_,) non-commissioned officers, usually such as have been recommended for promotion. II. The civil establishment consists of:-- 1. A Director of Studies, who has generally been a civilian, but is at present a Lieutenant-Colonel of Engineers. 2. Fifteen Professors, viz.:--Two of Mathematical Analysis. Two of Mechanics and Machinery. One of Descriptive Geometry. Two of Physics. Two of Chemistry. One of Military Art and Fortification. One of Geodesy. One of Architecture. One of French Composition. One of German. One of Drawing. Of these one is an officer of the Staff, another of the Artillery, and a third of the Navy; two are Engineers in Chief of the Roads and Bridges; nine are civilians, of whom two are Members of the Academy of Sciences. 3. Three Drawing Masters for Landscape and Figure Drawing; one for Machine Drawing, and one for Topographical Drawing. 4. Nineteen Assistant and Extra Assistant Teachers, (_répétiteurs_ and _répétiteurs adjoints_) whose name and functions are both peculiar. 5. Five Examiners for Admission, consisting at present of one Colonel of Artillery, as President, and four civilians. 6. Five Examiners of Students (civilians,) four of them belonging to the Academy of Sciences. 7. There is also a separate Department for the ordinary Management of Administration of the affairs of the school, the charge of the fabric and of the library and museums; and a Medical Staff. III. The general control or supervision of the school is vested, under the war department, in four great boards of councils, viz.:-- 1. A board of administration, composed of the commandant, the second in command, the director of studies, two professors, two captains, and two members of the administrative staff. This board has the superintendence of all the financial business and all the minutiae of the internal administration of the school.