J. H. BEEVES' 3 o Niagara Falls Railway Suspension Bridge. Engineer, John A. Roebling. Height of towers on American side, 88 feet. Height of towers on Canada side, 78 feet. Length of bridge, 800 feet. Width of bridge, 24 feet. Height above the river, 250 feet. Number of cables, 4. Diameter of cables, 10 inches, containing about 4,000 miles of wire, Ultimate capacity of the 4 cables, 12,400 tons. Total weight of bridge, 800 tons. Distance between railway track and carriage road below, 28 feet. Cost of construction, 600,000 dollars. Bridge first opened for railway traffic, March 8,1855. Estimated depth of water in the channel beneath the bridge, 250 feet. Velocity of current, 20 miles per hour. Velocity of Whirlpool Rapids, 27 miles per hour. Quantity of water passing through the gorge per minute, 1,600,000,000 cubic feet. Brooklyn Bridge. Survey begun by John A. Roebling, 1869. Construction begun January 2,1870. First rope thrown across the river August 14,1876. Depth of the New York foundation below high water mark, 78 feet 6 inches. Depth of the Brooklyn foundation below high water mark, 45 feet. The New York tower contains 46,945 cubic yards of masonry ; the Brooklyn tower, 38,214. Weight of the Brooklyn tower, about 93,079 tons. Weight of the New York tower, about a third more. Size of the towers at high water line, 140x59 feet; at roof course, 136x53 feet. Height of the towers above high water mark, 276 feet 6 inches. Height of roadway in the clear in the middle of the East River, 135 feet. Grade of the roadway, 3 feet 3 inches to 100 feet. Width of the promenade in the centre.of bridge, 16 feet 7 inches. Width for railway on one side of the promenade, 12 feet 10 inches. Width of carriage way, on the other side of the promenade, 18 feet 9 inches. Width of bridge, 85 feet. Length of main span, 1,595 feet 6 inches. Length of each land span, 930 feet. Length of the Brooklyn approach, 971 feet. Length of the New York approach, 1,560 feet. Length of each of the four great cables, 3,578 feet 6 inches; diameter, 15% inches ; number of steel galvanized wires in each cable, 5,434 ; weight of each cable, about 800 tons. Ultimate strength of each cable, 15,000 tons. Weight of steel in the suspended superstructure, 10,000 tons. Total cost, 14,500,-000 dollars. Opened for traffic in 1883. The Wedding Anniversary. At end of first year comes the__...... Cotton Wedding Second year.................,.......,__Paper Wedding Third year.............................Leather Wedding Fifth year........................,... .Wooden Wedding Seventh year ..........................Woolen Wedding Tenth year............................... Tin Wedding Twelfth year...............Silk and Fine Linen Wedding Fifteenth year..........................Crystal Wedding Twentieth year....................... . China Wedding Twenty-fifth year........................Silver Wedding Thirtieth year...................'.........Pearl Wedding Fortieth year...........................Ruby Wedding Fiftieth year.........................Golden Wedding Seventy-fifth year ...................Diamond Wedding