Scan of a glass lantern slide showing electric transmission lines on poles crossing a valley landscape. Location unidentified but in the Rocky Mountain regio
Scan of a glass lantern slide showing houses with powerlines; location unidentifie
Scan of a glass plate negative showing a structure for transportation of water, probably for hydroel...
Scan of a glass lantern slide showing the interior of a power generating station, possibly Olmsted h...
Scan of a glass lantern slide showing electric transmission lines on poles crossing a valley landsca...
Scan of a glass lantern slide showing power lines on poles, strung across an open landscape, probabl...
Scan of a glass lantern slide showing an unidentified power station, somewhere in the Rocky Mountain...
Scan of a glass lantern slide showing an electric power generator, probably used in an unidentified ...
Scan of a glass plate negative, showing electric transmission lines crossing a snowy mountain, somew...
Scan of a glass plate negative showing electric transmission lines on poles, crossing a valley somew...
Scan of a glass lantern slide showing the interior of an electric power plant, with generator. Loca...
Scan of a glass plate negative, showing a junction of electric transmission lines, located somewhere...
Scan of a glass lantern slide showing the interior of an electric power plant with five generators. ...
Scan of a glass lantern slide showing a switchrack with transformers at an electric utility transfor...
Scan of a glass plate negative showing transmission lines ascending a mountain slope, perhaps in the...
Scan of a glass lantern slide showing an electric "switchyard" or substation. Location unidentified,...
Scan of a glass lantern slide showing houses with powerlines; location unidentifie
Scan of a glass plate negative showing a structure for transportation of water, probably for hydroel...
Scan of a glass lantern slide showing the interior of a power generating station, possibly Olmsted h...
Scan of a glass lantern slide showing electric transmission lines on poles crossing a valley landsca...
Scan of a glass lantern slide showing power lines on poles, strung across an open landscape, probabl...
Scan of a glass lantern slide showing an unidentified power station, somewhere in the Rocky Mountain...
Scan of a glass lantern slide showing an electric power generator, probably used in an unidentified ...
Scan of a glass plate negative, showing electric transmission lines crossing a snowy mountain, somew...
Scan of a glass plate negative showing electric transmission lines on poles, crossing a valley somew...
Scan of a glass lantern slide showing the interior of an electric power plant, with generator. Loca...
Scan of a glass plate negative, showing a junction of electric transmission lines, located somewhere...
Scan of a glass lantern slide showing the interior of an electric power plant with five generators. ...
Scan of a glass lantern slide showing a switchrack with transformers at an electric utility transfor...
Scan of a glass plate negative showing transmission lines ascending a mountain slope, perhaps in the...
Scan of a glass lantern slide showing an electric "switchyard" or substation. Location unidentified,...
Scan of a glass lantern slide showing houses with powerlines; location unidentifie
Scan of a glass plate negative showing a structure for transportation of water, probably for hydroel...
Scan of a glass lantern slide showing the interior of a power generating station, possibly Olmsted h...
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