STC312690:
Experimenting in the properties of magnetic metals, from Chapter 5 of De Magnete, Magneticisque Corporibus, et de Magno Magnete Tellure, pub. Petrus Short, London, 1600 (engraving), Gilbert, William (1544-1603) / Bridgeman Images
STC311043:
The Terrella experiments, page from Chapter 3 of De Magnete, Magneticisque Corporibus, et de Magno Magnete Tellure, pub. Petrus Short, London, 1600 (engraving), Gilbert, William (1544-1603) / Bridgeman Images