The National Geographic Magazine, Volume 86, Issue 2National Geographic Society, 1944 - Geography |
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Page 632
... Magnetic Pole , visited by James Clark Ross and Roald Amundsen , is on Boothia Peninsula , in northern Canada . The South Magnetic Pole in Victoria Land was reached by Sir T. W. E. David and Sir Doug- las Mawson in 1909. These poles are ...
... Magnetic Pole , visited by James Clark Ross and Roald Amundsen , is on Boothia Peninsula , in northern Canada . The South Magnetic Pole in Victoria Land was reached by Sir T. W. E. David and Sir Doug- las Mawson in 1909. These poles are ...
Page 633
... Magnetic Poles , it behaves so erratically that it cannot be depended upon for navigation . A Compass Found Michigan's Iron Ore Large deposits of iron ore set up magnetic fields of their own , causing the needle to veer when it comes ...
... Magnetic Poles , it behaves so erratically that it cannot be depended upon for navigation . A Compass Found Michigan's Iron Ore Large deposits of iron ore set up magnetic fields of their own , causing the needle to veer when it comes ...
Page 635
... magnetic bronze . The sine galvanometer , on which readings of the earth's horizontal force are made , is a revelation of precision and exactitude ( page 632 ) . Watching for Jap Earthquakes If an earthquake should rock any part of the ...
... magnetic bronze . The sine galvanometer , on which readings of the earth's horizontal force are made , is a revelation of precision and exactitude ( page 632 ) . Watching for Jap Earthquakes If an earthquake should rock any part of the ...
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