[81.] EXPERIMENTUM LXI.
[82.] EXPERIMENTUM LXII.
[83.] EXPERIMENTUM. LXIII.
[84.] EXPERIMENTUM LXIV.
[85.] EXPERIMENTUM LXV.
[86.] EXPERIMENTUM LXVI.
[87.] EXPERIMENTUM LXVII.
[88.] EXPERIMENTUM LXVIII.
[89.] EXPERIMENTUM LXIX.
[90.] EXPERIMENTUM LXX.
[91.] EXPERIMENTUM LXXI.
[92.] EXPERIMENTUM LXXII.
[93.] EXPERIMENTUM LXXIII.
[94.] DE METHODO ARMANDI MAGNETES.
[95.] EXPERIMENTUM LXXIV.
[96.] EXPERIMENTUM. LXXV.
[97.] EXPERIMENTUM LXXVI.
[98.] EXPERIMENTUM LXXVII.
[99.] EXPERIMENTUM LXXVIII.
[100.] EXPERIMENTUM. LXXIX.
[101.] EXPERIMENTUM LXXX.
[102.] CAPUT TERTIUM. De Directione Magnetis & Ferri ſuper ipſo ducti.
[103.] EXPERIMENTUM LXXXI.
[104.] EXPERIMENTUM LXXXII.
[105.] EXPERIMENTUM LXXXIII.
[106.] EXPERIMENTUM LXXXIV.
[107.] EXPERIMENTUM LXXXV.
[108.] EXPERIMENTUM LXXXVI.
[109.] EXPERIMENTUM LXXXVII.
[110.] EXPERIMENTUM LXXXVIII.