Several shots from various angles of scientists testing waters of Great Slave Lake for temperature, chemical content and animal and vegetal life. Several shots from various angles of Slave River falls into Great Slave Lake (power potential). LS PAN of part of modern Yellowknife. Two MLSs of gold mine at Yellowknife, TILT UP and PAN. Two LS PANs over waters of Great Slave Lake showing heavy storm-like clouds.