. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 126 THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. [April The price of (lie'fiiiilwr for tlie Troy Bridge, iiii'liuling every thing but pninling, is lS-25 ilolUirs per foot. The |)iiMs ;ire of fine bhie limestone. The flooring is 30 feet above low water. The Tuscaloosa briilgi' is fonr spans of 220ft. each over the black Warrior River. Tiie lieight of the trellis is Kift. anil it cost (MUU/. It was opened in De- cember 1^3-1; ami has stood well ag;iinst the trallic wbieli has pas
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 126 THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. [April The price of (lie'fiiiilwr for tlie Troy Bridge, iiii'liuling every thing but pninling, is lS-25 ilolUirs per foot. The |)iiMs ;ire of fine bhie limestone. The flooring is 30 feet above low water. The Tuscaloosa briilgi' is fonr spans of 220ft. each over the black Warrior River. Tiie lieight of the trellis is Kift. anil it cost (MUU/. It was opened in De- cember 1^3-1; ami has stood well ag;iinst the trallic wbieli has passed o\n, particularly large herds of cattle. Anotiier bridge of the same conslrncticn of large span is at Nashua, in New llampsliire, thrown over I lie Merriuack, The bridge across the great Conestogo to I'arry the iMnladelphia aiid C'ulumbia railway, as it formerly stood was 1-U2 feet long, and in nine s]ians of 1JO feet. Its breadlli was 22 feet, and the flooring rested oii the string piece. Tliis bridge was nuich too weak, Ihe trains could run but slowly on if, and the trusses were only 2 inches thick, so that it has recently been obliged to be rebuilt. Mr. Kobinson prefers trellis bridges, and the many railways he has constructed to those of any other construction, and has introduced con- siderable improvements into them. That atKichiiiond is the most re- markalile which he has built, and is distinguished as a first rate piece of carpentry, even in America where this mode of construction is car- ried to such jierfecfion. This bridge stands without the town of Rich- mond,on the railway from that town to I'etersbiirgh, forming part of the grand line from nortli to south thrmigb New York, I'liiladi-ipbia, Bal- timore, Washington, Fredricksburgh, Richmond, I'etersburgh, Raleigh, and Charleston. Bridge oveh the James River at in Virginia, United States. This bridge was commenced in December 1S3G, and finished 5th September 1838, it was built by Mr. Sandford, nnder the
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