Excerpt from Terrestrial Magnetism: Results of Magnetic Observations Made by the United States Coast and Geodetic Survey in 1919
When in 1912 it was decided to confine the annual report of the Superintendent to administrative matters and to publish separately the scientific r... esults which had formerly appeared as appendixes to to the report, the time was deemed opportune to change from the fiscal year to the calendar year in the publication of the results of magnetic observations in the field. Accordingly Special Publication N o. 15 contained the results of observations made between July 1, 1911, and December 31, 1912, and the results for subsequent calendar years have appeared in Special Publications N 08. 20, 25, 36, 42, 51, and 55.
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