The secular variation of terrestrial magnetism in Siberia

Abstract

There exists no summary of magnetic determinations actually made in Siberia. Hansteen's “Untersuchungen ueber den Magnetismus der Erde” is now quite out of date, and Sabine's classical “Contributions to Terrestrial Magnetism,” No. XIII, did not comprise the considerable amount of observations made in the first half of the seventies of the last century by Fritsche, Miller, and Scharnhorst, and, in this century, by Voznesenskij, Smirnov, the Author and his co‐workers, and by other observers.The insufficiency of even Sabine's work now can be easily seen, for instance, from Table I, which gives the number of magnetic observations in the zone of Siberia between parallels of latitude 45° and 60° North and between the meridians 60° and 135° East of Greenwich, either published or in press; D denotes the magnetic declination, I, the inclination, and H, the horizontal intensity.