メキシコ湾流
By 1880 "George S. Blake" current data was supporting Bartlett's theory that "much of the supply for the Gulf Stream passes near the eastern end of Cuba." With Gulf Stream work coming to the fore the next season, a new electrical apparatus for recording temperatures was installed. After a northern season with Agassiz again aboard for dredging on Georges Bank, the ship went into winter lay up before setting out from Providence, Rhode Island 4 May 1881 for work in the Gulf Stream, described as: