Henrik Greve Blessing collecting samples of algea from the salt- and the freshwater. The melting ice has left a layer of freshwater on top of the saltwater. One of the pictures from the expedition with arctic ship toward the North Pole in the period June 24, 1893 to August 13, 1896. According to the plan, the ship was to drift in the ice with the ocean current from the coast of Siberia across the North Pole to Greenland. The goal, to get to the North Pole, was not reached, but the scientific evidence gathered was of great importance to arctic research.