100 200 f The Ground Floor is a regular Octagon. 365 feet 5 inches in diameter. This measurement does not include the three Entrance Halls each of which projecting 27 feet is 40 feet 5 inches wide. On each side of these Entrances Offices are attached projecting 18 feet from the main Building and being 27 feet in width. The Interior consists of four great Divisions, each having a Main Avenue, with side Aisles which are connected on the ground floor by four triangular sections. These Main Avenues unite at the Dome and together form a Greek Cross, which shape is preserved in the Gallery Floor. The Materials used in the construction are chiefly Iron and Glass. |