**Hansteen, Christoph**, a Norwegian astronomer and mathematician, born
in Christiania, where he became professor of Mathematics; is famous for
his researches and discoveries in connection with the magnetism of the
earth, and the impetus he gave to the study of it; he prosecuted his
magnetic researches as far as the E. of Siberia, and published the
results (1784‒1873).

Definition taken from
*The Nuttall Encyclopædia*,
edited by the Reverend James Wood (1907)