Senate Chamber.-Length, 113 feet; width, 803 feet; height, 39 feet. Floor is 83 feet long, 51 feet wide. Galleries seat 1,200 persons. The ceiling is of iron with glass panels, lighted same as Representatives Hall. Treasury Building.—Dimensions: Four hundred and sixtyeight feet north to south, 264 feet east to west; inclusive of por ticos and steps, 582 feet by 300 feet. Cost, $6,000,000. Architects-Robert Mills, T. U. Walter, Young, Rogers, and A. B. Mullett. State, War, and Navy Building.—A. B. Mullett, architect. Extreme dimensions north to south, 567 feet; east to west, 342 feet; exclusive of projection, 471 feet north to south, and 253 feet east to west. Cost, $5,000,000. New City Hall, Philadelphia; John McArthur, jun., State Capitol, Hartford, Conn.; R. M. Upjohn, architect, New-York City. Exterior is of marble; building is of fireproof construction, with brick and iron floors. The Washington Monument, at Washington, D.C., is 555 feet 5 inches high, and has a base of 55 feet, with an entasis of 1 foot in every 34 in height. The monument is faced with white marble and backed with blue granite to the height of 452 feet; above that the walls are entirely of marble. The average settlement of the structure at each corner is 1.7 inches. The monument is a simple plain obelisk with no embellishments what ever. The weight of the monument is 80,470 tons, or 3.6 tons per square foot; the area covered by the foundation being 22,400 square feet. The corner-stone of the monument was laid July 4, 1848, and the cap-stone was set Dec. 6, 1884. Metropolitan Opera-House, New York; J. C. Cady, New York, architect. The building fills a square 200 × 260 feet; the size of the auditorium is 85 feet 8 inches × 95 feet 6 inches; the stage is 90 feet × 101 feet, and 150 feet from top to bottom; the seating capacity is 350); there are 5 stories of balconies. The trusses used for roofing the auditorium and stage are 8 panelled Belgian trusses, having a span in great part of 106 feet. They are 13 feet from centres over the auditorium, and 8 feet from centres over the stage, where they have to carry the weight of the rigging-loft and the great fire-tank, in addition to the roofing. The feet of the trusses on one side are mounted on carriages to allow for contraction and expansion. They are secured by lines of sway braces, while purlins of angle-irons running between them receive the building-blocks, which in turn receive the slating. Under the ridge of the stage roof is suspended a fire-tank of boiler-iron resembling an ordinary boiler; its length is 78 feet. It was built in its position, and tubes were built in at intervals to allow members of the roof-trusses to pass through it. Underneath the whole is a large pan to receive any possible leakage. This tank supplies the automatic sprinklers which guard the whole stage area, and also the various lines of fire-hose. The truss over the proscenium opening has a span of 86 feet, is 76 feet above the stage, and carries a brick wall 40 feet in height. This wall is stayed, not only by the roof masses, but by a series of compensating braces and ties. The stage-supports are of iron, instead (as usually) of wood. They are made in sections easily taken apart to admit of any desired change in the stage or the space under it. There are over 3000 separate pieces of iron-work in this part of the structure, The cost of the building proper was $951,322.41; cost of heating, ventilation, seating, decoration, carpets, and furniture, $119,819.56; cost of scenery, costumes, properties, music library, etc., $142,500.00. The Madison Square Garden, New York City.Messrs. McKim, Mead, and White, architects. This building covers the block bounded by East Twenty-seventh Street, Fourth Avenue, Twenty-sixth Street, and Madison Avenue. It combines an immense amphitheatre, a restaurant (80 x 90 feet), a ball-room, a concert hall, an open-air roof garden, and a theatre. The amphitheatre is an enormous room, 310 x 194 feet and 80 feet high, with an arena containing 30,000 square feet. The room is semicircular at each end, and is provided with permanent seats for 7,800 people, with sufficient standing space left to give room for a total of 15,00) persons. This vast arena, covered by the immense roof without central support, is entirely open and free from side to side and from end to end. For summer performances the roof can be opened by machinery. The theatre has a seating capacity of about 1,200, with standing room for 400 more. The open-air garden extends over the roof along the Madison Avenue front. It will hold from 3,000 to 5,000 people. The building is surmounted by an immense tower 300 feet high. AUDITORIUM BUILDING, CHICAGO, ILL., 1887-89. ADLER & SULLIVAN, ARCHITECTS. The Auditorium Building includes: 1. The Auditorium.-Permanent seating capacity, over 4,000; for conventions, etc. (for which the stage will be utilized), about 8,000. Contains the most complete and costly stage and organ in the world. 2. Recital Hall.-Seats over 500. 3. Business Portion consists of stores and 136 offices, part of which are in the tower. 4. Tower Observatory, to which the public are admitted. U. S. Signal Service occupies part of 17th, 18th, and 19th floors of tower. Above four departments of the building are managed by Chicago Auditorium Association. 5. Auditorium Hotel has 400 guest rooms. The grand diningroom (175 feet long) and the kitchen are on the top floor. The magnificent Banquet Hall is built of steel, on trusses, spanning 120 feet over the Auditorium. Area covered by building, about one and one-half acres. Total street frontage (fronting Congress St., Michigan and Wabash Aves.), 710 feet. Height of main building (10 stories), 145 feet. Height of tower above main building (8 floors), 95 feet. Height of lantern tower above main tower (2 floors), 30 feet. Total height, 270 feet. Size of tower, 70 x 41 feet; the foundations cover about two and one-half times larger area. Weight of entire building, 110,000 tons. Weight of tower, 15,000 tons. Exterior material: First and second stories, granite; balance of building, Bedford stone. Cost of building, $3,200,000. THE LONGEST BRIDGES IN THE WORLD. ["Engineering News."] Forth Bridge, 9,200 feet. Montreal Bridge, over the St. Lawrence, 8,791 feet. The Baltimore & Ohio Bridge, at Havre de Grace, 6,000 feet. Wooden bridge at Columbia, Pa., 5,366 feet. Moerdyck, Holland, 4,927 feet. Dnieper, near Jékaterinoslaw, Russia, 4,213 feet. Dauphin Bridge, over the Susquehanna, 3,590 feet. Barrage Bridge, Delta of the Nile, 3,353 feet. Havre de Grace Bridge, over the Susquehanna, 3,271 feet. Keokuk, Ia., over the Mississippi, 2,008 feet. Chaumont Viaduct, valley of the Suize, France, 2,000 feet. The Brooklyn Bridge (between New-York City and Brooklyn). The following statistics relating to the construction of the Brooklyn Bridge are taken from "The Boston Herald:" Size of New-York caisson, 102 feet by 172 feet. Size of Brooklyn caisson, 102 feet by 168 feet. New-York tower contains 46,945 cubic yards of masonry. Length of river-span, 1595 feet 6 inches. Length of each land-span, 930 feet. Length of Brooklyn approach, 971 feet. Length of New-York approach, 1562 feet 6 inches. Total length of bridge, 5989 feet. Width of bridge, 86 feet. Number of cables, 4. Diameter of each cable, 153 inches. Weight of four cables, inclusive of wrapping-wire, 3538 tons. Ultimate strength of each cable, 12,200 tons. Weight of wire, nearly 11 feet per pound. Each cable contains 5296 parallel, not twisted, galvanized steel o..-coated wires, closely wrapped to a solid cylinder 153 inches in diameter. size of towers at high-water line, 59 feet by 140 feet. Size of towers at roof-course, 53 feet by 136 feet. Total height of towers above high water, 278 feet. Clear height of bridge in centre of river-span above high water at 90° F.. 135 feet. Height of floor at towers above high water, 119 feet 3 inches. Size of anchorages at base, 119 feet by 129 feet. OTHER NOTABLE BRIDGES. The following bridges are notable either from their size or historical connection : The Lagong Bridge, built over an arm of the China Sea, is 5 miles long, with 300 arches of stone, 70 feet high and 70 feet broad, and each pillar supporting a marble lion 21 feet in length. Its cost is unknown, but much exceeds that of the Forth Bridge. |