M0015306: Illustration of an early type of Siemens' Self Exciting dynamo with drum-wound armature and bar commutator, 1873
- Date:
- October 1956
- Reference:
- WT/D/1/20/1/136/71
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: M0015306: Illustration of an early type of Siemens' Self Exciting dynamo with drum-wound armature and bar commutator, 1873. Wellcome Collection. Source: Wellcome Collection.
