Hydraulic and nautical observations on the currents in the Atlantic ocean : forming an hypothetical theorem for investigation ; addressed to navigators by Governor Pownall ; to which are annexed some notes by Dr. Franklin

by

Thomas Pownall, one of the most successful of British colonial administrators, instigated several important surveying and scientific projects during his tenure in America. In the course of numerous Atlantic crossings, he observed the actions of the Gulf Stream, which he discussed here. He shared this interest with Franklin, who was the first to publish information on the Gulf Stream, and who here supplied footnotes to Pownall's text.