[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.

[111.] EXPERIMENTUM LXXXIX.

[112.] EXPERIMENTUM XC.

[113.] EXPERIMENTUM XCI.

[114.] EXPERIMENTUM XCII.

[115.] EXPERIMENTUM XCIII.

[116.] EXPERIMENTUM XCIV.

[117.] EXPERIMENTUM XCV.

[118.] EXPERIMENTUM XCVI.

[119.] EXPERIMENTUM XCVII.

[120.] Tabula Declinationis Acus Magneticæ Pariſiis obſervatæ.