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Maryland Geological Survey, Volume 1, 1897
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
will be seen that the curve, which is due to Mr. Schott, represents the
existing data satisfactorily. In the case of Fay al Island it will be

[See page image for table]

Fig. 4. —A comparison of the Baltimore secular variation curve of the magnetic declination with those
obtained at various stations in the northern hemisphere.

noticed that prior to 1600 I have given two curves, one in full and
the other broken; the broken curve represents a repetition of the
same law which governed the secular variation at this station be-


 

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Maryland Geological Survey, Volume 1, 1897
Volume 423, Page 469   View pdf image (33K)
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