The National Geographic Magazine, Volume 86, Issue 2National Geographic Society, 1944 - Geography |
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Page 631
... Magnetic Station at Cheltenham , Maryland , makes an observa- tion with a sensitive Cooke magnetometer ( page 634 ) . His assistants use an earth inductor ( center ) and another magnetometer ( right ) . Recordings like these , made all ...
... Magnetic Station at Cheltenham , Maryland , makes an observa- tion with a sensitive Cooke magnetometer ( page 634 ) . His assistants use an earth inductor ( center ) and another magnetometer ( right ) . Recordings like these , made all ...
Page 632
... magnet , the mar- iner's compass would point directly toward the North Magnetic Pole . Actually , it is by no means so obliging . Although the needle points northward , its direction is neither true north nor toward the North Magnetic ...
... magnet , the mar- iner's compass would point directly toward the North Magnetic Pole . Actually , it is by no means so obliging . Although the needle points northward , its direction is neither true north nor toward the North Magnetic ...
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 ...
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