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: In copyright
Credit: M0015306: Illustration of an early type of Siemens' Self Exciting dynamo with drum-wound armature and bar commutator, 1873. Source: Wellcome Collection.
