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City of Calgary. Electric System fonds Science and technology* With digital objects
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1000 KW DC generator for street railway.
1000 KW DC generator for street railway.
A visit to a maintenance hole.
A visit to a maintenance hole.
Abe Wiens and Mike O'Flynn conducting transmission pole repairs.
Abe Wiens and Mike O'Flynn conducting transmission pole repairs.
Air cooled network transformer.
Air cooled network transformer.
Alderman Crichton and R. A. Brown on transmission pole.
Alderman Crichton and R. A. Brown on transmission pole.
Antique carbon arc lamps prior to removal.
Antique carbon arc lamps prior to removal.
Arc circuit transfer for street lighting.
Arc circuit transfer for street lighting.
Basement of Substation #20.
Basement of Substation #20.
Batteries for substation controls.
Batteries for substation controls.
Battery charger.
Battery charger.
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