National Geographic : 1944 Dec
© National Geographic Society Kodachrome by Owen Lattimore Shearing the Swift Yenisei, a Side-wheeler Puffs a Streamer of Wood Smoke as ItTows aBarge Upstream For many of the Yenisei's 2,900 miles, no sign of life is visible. Like Canada's Mackenzie River, it flows into the Arctic, and soitsusefulness islimited. Inwinter the frozen stream serves as a sled track, but at its mouth 50-foot ice hills grind thunderously. In summer its warm current softens theicepack and assists Arctic Ocean navigation. Soviet icebreakers opened the Northeast Passage in the 1930's. Now ocean-going steamers push down theYenisei toIgarka, alusty lumber port.