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Solar power, Italy, 1982
UMG23A12_432

Solar power, Italy, 1982

A woman with a powered by solar energy portable radio, 1957
UMG23A15_165

A woman with a powered by solar energy portable ra...

Grand Coulee Dam
UMG23A34_306

Grand Coulee Dam

Opening Of Grand Coulee Dam
UMG23A34_305

Opening Of Grand Coulee Dam

Opening Of Grand Coulee Dam
UMG23A34_304

Opening Of Grand Coulee Dam

Dynamo of the power unit of Niagara
UMG21A11_105

Dynamo of the power unit of Niagara

Machine for splitting firewood / Maschine zum Holzspalten
UMG20B50_414

Machine for splitting firewood / Maschine zum Ho...

The Steamer "Yukon" In Alaska
UMG20A18_291

The Steamer "Yukon" In Alaska