307 磁気コンパスの歴史 : 指南針について(機械技術史・工学史)

抄録

In this paper, SHINANSHIN which is a initialform of the magnetic compass is reported. SHINANSHIN is the south seeking needle. First this magnetic needle was made by natural magnet. Afterwards, used magnetic needle changed to the magnet which was artifical from natural magnet. These processes are described from the discovery that has the property in which the magnet points to the south. And, the process of the chnge of the south seeking needle to the magnetic compass is also described.