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Credit
Magnetische Kraftfelder : die Erscheinungen des Magnetismus, Elektromagnetismus und der Induktion dargestellt auf Grund des Kraftlinien-Begriffe / von H. Ebert. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.