Illustration showing A piece of lodestone in rock
Illustration showing A piece of lodestone in rock (left). On the right it is shown removed and broken up, but line AB, the pole, will always remain the same, whatever the shape of the magnet. From Johannes Baptista della Porta Magia Naturlis, Nuremberg, 1715
Picture No
13912245
Media ID
48525232
Size
5030px x 4169px
(5.1MB)
Credit
World History Archive / Mary Evans Picture Library
Source
World History Archive





























