Pierre, de Maricourt, active 13th century. Epistle of Peter Peregrinus of Maricourt to Sygerus of Foncaucourt, soldier, concerning the magnet.

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Pierre, de Maricourt, active 13th century.

Epistle of Peter Peregrinus of Maricourt to Sygerus of Foncaucourt, soldier, concerning the magnet.

Magnets.

Thompson, Silvanus P. (Silvanus Phillips), 1851-1916.