Important early American chart illustrating the Gulf Stream, engraved by Benjamin Jones in Philadelphia and published by the American Philosophical Society.
This chart illustrates an early model of the Gulf Stream from the Gulf of Florida north to the Grand Bank then curving southeast to the Senegal coast of Africa which is labeled "Azanhaga." Arrows mark the direction of the stream, with the winds shown from northeast to southwest and an annotation noting the "usual course from Britain to the West Indies, Carolina and Virginia for sake of the Trade Winds" south of the stream and "course from Britain to St. John in Newfoundland" north of the stream.
The map is based upon a chart is chart published by Robert Sayer in his West India Pilot in 1787.
Formed in Philadelphia in 1769, the mission of the American Philosophical Society was "the promoting of useful Knowledge in general, and such branches thereof in particular, as may be more immediately serviceable to the British Colonies." It met regularly to hear papers submitted by its members and others and in 1771 published the first volume of its Transactions.