[Magnet], history of the, [94];

variation of, [94];

lines of no variation, [95].

See [Compass], [Needle].

Magnetic curves, charts of, [100].

Magnetic pole, [95].

Maida (island), [451], [453].

Maiollo, map of America (1527), [94], [219], [220].

Major, R. H., Select Letters of Columbus, [10], [47];

Conquest of the Canaries, [36];