Photograph showing a man on a ladder wearing a safety belt holding an electrical line with ceramic insulators. Behind him, two other men in work wear stand higher on the metal frame structure. On the negative is written "49-53."

Photograph showing workers building a transmission tower component. Several men holds parts of the structure, while one man on the left side of the frame looks on. In the distance, fences, an open field, and wooden houses can be seen. On the negative is written "49-74."

Photograph taken from a side angle, showing an electrical transformer, likely at an electrical substation. Several ceramic insulators can be seen at the top of the unit, as well as numerous attached electric lines. On the negative is written "49-73."

Photograph showing an electrical transformer, likely at an electrical substation. On the front of the unit is written "General Electric." On the top of the unit are several ceramic insulators and electric lines. On the negative is written "49-77."

Photograph of a man in a suit with a microphone, standing in front of a wooden utility pole. Attached to the pole is a metal electrical panel with switches. In the background, a vehicle with an open trunk is visible. On the negative is written "49-66."

Photograph showing a paneled electrical unit with numerous switches. Wires can be seen coming out of the bottom of the unit. On the negative is written "49-81."

Photograph, taken from the side, showing a man looking upward while holding a metal lever. In the background, more electrical equipment and ceramic insulators can be seen. On the negative is written "49-86."

Photograph showing a man with a paneled electrical unit. He is wearing a pocketed work vest, and is looking at the panel while holding a wire towards the board. On the negative is written "49-95."

Photograph of a man sitting in front of a switchboard unit. Two meters on the unit are visible, with "watts" and "volts." The is turning a numbered dial with his right arm while facing away from the camera. Written on the negative is "50-376."

Photograph showing workers in an open area using a truck mounted "Williams Hole Digger." The man on the right is facing towards the machine and is leaning towards the hole, while the other man stands to the left also looking towards the hole. Written on the negative is "50-411."

Photograph showing two men feeding branches into a wood chipper. Wood chips can be seen coming out from the side of the unit. Written on the negative is "50-439."

Photograph showing a man using a industrial monkey while trimming a tree away from electrical lines. He is holding the handle of a wired tool while looking downward at the tree. Written on the negative is "50-480."

Photographs showing two men in suits standing to either side of a large radio transmitter unit. They are both looking at the unit, and the man on the right is smiling. A sign on the unit reads "Wired Radio Transmitter, Line Material Co." Written on the negative is "50-658."

Photograph showing a man looking at an accounting machine, with the mechanism covers removed. Multiple conduits and a fan can be seen. A bar runs across the bottom of the frame, blocking some of the image.

Photograph showing five women sitting at individual card punch accounting machines. Each person has a pad holder to her left, and a visible punch card in the machine. Hanging coats can be seen in the background, as well as two large windows.

Photograph showing a man wearing a long jacket standing on a raised cement platform. He is looking towards three large electrical units with belts, and water can be seen under the platform. In the background is a wooded hillside. Written on the negative is "51-868."

Photograph taken from a high angle, looking downward at a kneeling man working on a large electrical generator at an unidentified location. Another unit can be seen in the background. Written on the negative is "51-880."

Photograph showing a man (Alex Komolofske) wearing a dirtied work jumper standing next to a wheeled generator vehicle. A "PGE" logo is attached to the generator, with "Onan Electric Plant" painted on the side.

Photograph showing a man driving a open cockpit caterpillar machine at the top of a canyon at Cove Palisades State Park. At the base of the canyon is a river (the Deschutes River or Crooked River). On the machine is written "Caterpillar."

Photograph showing a caterpillar machine at the top of a canyon, with a man driving in an open cockpit. Next to the machine is a man standing to the side of the dirt track, and a car with an open door can be seen in the background.

Photograph of the engine room of Station L (now the Oregon Museum of Science and Industry) showing machinery. A person in a white shirt can be seen on the right side of the frame, and the front unit has “General Electric Company” written on it.

Photograph taken at Station L (later the Oregon Museum of Science and Industry), looking downward at two generators. The far unit is being rewound with visible cable. Pieces of debris can be seen around the room, in addition to possible damage on the back wall. Large windows can be seen along the left wall, and metal plating lines the back wall.

Photograph showing exterior and large machinery in Station L building. Several large generators can be seen on the main floor, with all peaked ceiling.

Emily Wood sits at a typewriter and smiles at the camera. On a desk to her right is a cylindrical machine with hoses or wires that come out of it. These form an arc in the air and she holds the other end to her typewriter. The caption on the negative sleeve reads, "Emily Wood - with eraser machine she invented" (negative 1 of 2).

Photograph of 2 men working in a repair shop. The shop likely services buses operated by the Spokane, Portland & Seattle Railway. Handwritten note on the back of the print reads, "Stage repair." Stamp on the back for Arthur M. Prentiss, Commercial Photographer.

Negative of a photographic postcard showing the generators at the Bonneville Dam. The generators are circular machines lined up in a large open room. Handwriting on negative reads, "Generators - Bonneville Dam. Christian 11-623."

Uncased tintype featuring a portrait of an unidentified man and woman sitting in a yard in front of a house. The woman sits on the left and looks at the camera. The man wears a hat and sits at a long machine which he operates using a hand-cranked wheel. It features a wooden track shuttle. It appears to be a spinning machine for rope or yarn.