1. Peregrinus de Maricourt P (1269) Epistola de Magnete (unpublished).
2. De Magnete;Gilbert,1600
3. Experimenta Circam Effectum Electrici in Acum Magneticam (Hafniae, Schultz Press). English translation (1820): Experiments in the effect of current of electricity on the magnetic needle;Ørsted;Annals of Philosophy,1820
4. The telegraphone: A magnetic speech recorder;Poulsen;Electrician,1900
5. L’hypothèse du champ moléculaire et la propriété ferromagnétique;Weiss;Journal de Physique Théorique et Appliquée,1907