Arctic explorers have long wondered why rock, gravel, and sand are so often found on and imbedded in bergs and floes. Many writers claim that rocks are shoved by glaciers, while at the time adhering to them, till the iceberg drifts against another berg and they freeze together. This is not a reasonable explanation how the rocks came on the ice, as the glacier, after it struck the water, would have to turn on its side to bring the bottom of the berg in a position to come in contact with another…