| Volume 423, Page 469 View pdf image (33K) |
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MARYLAND GEOLOGICAL SURVEY 469
known to us up to the present time have been indicated by dots. It
[See page image for table]
Fig. 4. —A comparison of the Baltimore secular variation curve of the magnetic declination with those
noticed that prior to 1600 I have given two curves, one in full and |
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| Volume 423, Page 469 View pdf image (33K) |
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