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Show The Hassler Expedition. The Hnssler scientific expedition wns made In the United Stntes const survey stenmer Hnssler, between Dec. 4, 1871, nnd August, 1S72, P. C. Johnson commanding. Tho scientific Investigations Investiga-tions were cnrrled on under the ehnrge of Prof. Louis Agnsslz. Stnrtlng from Phllndclphln, tho route embraced the West Indies, Hrnzlllnn const. Strait of Magellan, nnd the Pnclflc const nnd Islnnds to Snn Frnnclsco. Deep sen dredglngs were made at nil favorable points. |