Lodestone
Videos
Lodestones are naturally magnetized pieces of the mineral magnetite. They are naturally occurring magnets, which can attract iron. The property of magnetism was first discovered in antiquity through l
Lodestone in the Hall of Gems of the Smithsonian
Lodestone attracting small bits of iron
De Magnete
Videos
De Magnete, Magneticisque Corporibus, et de Magno Magnete Tellure is a scientific work published in 1600 by the English physician and scientist William Gilbert. A highly influential and successful boo
Title page of 1628 edition
Cutting a terrella
Angles of force on the terrella