eously attaches itself.
When an iron needle is touched by the stone, it at once points towards the North Star; from whence it has become useful to those who navigate the seas.
Latini of Florence, the preceptor of Dante, in a work published in Paris in 1260, entitled the Treasure, wrote thus:—
When I was in England, Friar Bacon showed me a magnet,—an ugly black stone to which iron doth willingly cling.
You rub a needle upon it; the which needle, being placed upon a point, remains suspewas subdued by the Moors.
An authority states that it was known in Norway previous to 1266.
Dr. Gilbert, physician to Queen Elizabeth, states that P. Venutus brought a compass direct from China in 1260.
See Klaproth's work on this subject, Paris, 1834; Sir Snow Harris's Rudimentary magnetism ; the researches of Biot, Stanislaus Julien, etc.
About 1320, Flavio Gioja, a pilot of Positano, not far from Amalfi in the Kingdom of Naples, was instrumental in the improvement of the compass, a