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self-reversal

Overview page. Subjects: Earth Sciences and Geography.

The ability of certain ferromagnetic materials to acquire a thermal remanence in the opposite direction to the ambient magnetic field. Usually this requires the interaction of two or more...

See overview in Oxford Index

Blackwell, Henry Browne

Debra Viles.

in American National Biography Online

January 1999; p ublished online February 2000 .

Reference Entry. Subjects: Social and Cultural History; Society and Culture; Journalism; Business and Management. 1699 words.

Blackwell, Henry Browne (04 May 1825–07 September 1909), social reformer, editor, and entrepreneur, was born in Bristol, England, the son of Samuel Blackwell, a sugar refiner and...