Excerpt from Terrestrial Magnetism: Results of Magnetic Observations Made by the United States Coast and Geodetic Survey in 1915
In 1882 the results of magnetic observations made by this bureau prior to 1881, together with descriptions of stations, were published as Appendix ... 9, Report for 1881. From that time to 1902 the results were published only in connection with a discussion of the distribution or secular change of one or more of the three magnetic elements. In Magnetic Declination Tables and Isogonic Charts for 1902 the declination results were given for all stations occupied up to that time and descriptions were given of the stations occupied subsequent to 1881. From 1903 to 1911 there has been published annually an appendix to the Superintendent's report, giving the results of magnetic observations made during the fiscal year (july to June) covered by the report.
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