1500 - 1763 Discovery and First Spanish Period
1763 - 1783 English Period
1783 - 1821 Second Spanish Period
1821 - 1845 Territorial Period
1845 - Statehood
and Later
1861 - 1865 Civil War
Gulf Stream The Mapping of the Current

A chart of the Atlantic Ocean exhibiting the course of the Gulf Stream
Duane, William (Publisher)

This rare map is a copper engraving showing the coasts of North America, Europe and northwestern Africa. This is the first published map to show the gyres and branches of the Gulf Stream with the northernmost part going to Iceland and Norway then down to England and Ireland and returning to the southern Atlantic as the North Equatorial Current. A southern portion follows the path shown on earlier maps headed toward Africa, but not reaching its shore. DeBrahm's 1775 chart shows a circular pattern of the north equatorial current.

Duane took over Benjamin Franklin's printing company when Franklin retired. The cartographer is unknown, so the map is known as the "Duane Map." However, he is best known as an editor of the Aurora, a Democratic paper published in Philadelphia.