Reflections upon the perils and difficulties of the winter navigation of the Delaware [microform] : means by which these may be meliorated : plans for the relief of vessels entangled in the ice : improvement of the existing ice-harbours, and for the construction of intermediate harbours parallel to the direction of the stream and shore, in order that the force of the ebb and flow alternately sweeping over the same ground, may prevent the deposition of alluvion, and preserve their primitive depth.
Jones, William,1760-1831.
Philadelphia : Published by order of the Chamber of commerce,
1822.
Sabin 36622.
Sabin Unit 45.
Microfiche.