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adamant, [11].

æquator, the magnetick, [13], [79].

Aetius Amidenus, [2].

Affaytatus, Fortunius, [6].

agate, non electrick, [51], [53].

Agricola, Georgius, [2], [3], [10], [19], [26], [111], [112].

Agrippa, H. Cornelius, [3].

aimant, [11].

Albategnius (Muhammad ibn Jābir, Al-Battāni, [237].