OF BRIDGES.

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offset, and spring from this angle. The height ofthe piers next the shores, from the foot of the arcsto ordinary low water mark, is twenty-seven feet fiveinches, and of those in the middle twenty-eight feetseven inches each. The distance between the abut-ments is one thousand and eight feet, and the wholelength of the Bridge, including the wing walls, willbe one quarter of a mile.

The whole of the stone work done consists ofone hundred and sixty-nine thousand, two hundredand twenty-three feet of cut stone, contained in six-teen thousand six hundred and fifty perches of ma-sonry.

On the execution of this branch of the work com-mited to their care, the board of managers rely withthe fullest confidence, and do not hesitate to pro-nounce it as solid and complete a piece of masonryas is any where to be found in the United States .

The superstructure consists of five arcs, or fivesets or series of arcs, each composed of five sectionsor ribs, as they are usually called, and rising from thechord line, in the proportion of thirteen feet in onehundred. These sections or ribs are formed of whitepine plank, of from thirty-five to fifty feet in length.