Note 1 — Chapter I

For a statistical account of the Schuylkill permanent bridge, the reader is referred to a new and valuable work, the “Memoirs of the Philadelphia Agricultural Society,” vol. i, and to Biddle’s “Young Carpenter’s Assistant.”

As a specimen of the difficulties, and uncommon perseverance of the company in building the Schuylkill bridge, we give the following instance: The British troops when at Philadelphia had formed a bridge of boats over the Schuylkill, one of which had been accidentally sunk in 1777, twenty-eight feet below common low water. It occupied a part of the area of the western coffer dam, with one end projecting under two of the piles of the inner row, and had nearly rendered the erection abortive. It was first discovered on pumping out the dam, in 1802; and was perfectly sound, after the lapse of 25 years. The iron work had not the least appearance of rust, or the wood (which was common oak) of decay. The taking this boat to pieces, the straining the dam, and the leaks in consequence, were the chief causes of an extra expenditure, by the company, of more than 4000 dollars, hardly and perilously disbursed in pumping (which alone cost from 500 to 700 dollars weekly) and other labour, during forty-one days and nights in the midst of a most inclement winter. Mem. Phila. Ag. Soc.—Cramer.