attraction on surface of, [57].

Livio Sanuto, [5], [153], [167].

loadstone armed and unarmed, [86], [87], [88].

as medicine, [32].

in plasters, [33].

rock, the, [5], [6], [18], [116], [152].

various names of, [11].

colours of, [9], [10], [27].

various sources of, [8], [25], [32].

London, magnetick variation at, [154], [163].