Photograph negative is a copy of four photograph prints, showing: people assembled on porch for Director's visit to construction site; partially constructed Coquitlam Dam; water flowing through temporary gates of dam; and construction site for Coquitlam Dam. Negative was created to produce lantern slides of the four images.
Photograph negative is a copy of three photograph prints, showing: men standing next to railway tracks in partially excavated tunnel; man standing next to monitor releasing water into cleared area; and men standing with tools in partially excavated tunnel. Negative was created to produce lantern slides of the four images.
Photograph negative is a copy of four photograph prints, showing: man standing on partially built structure; group of men assembled on porch of house; and two views of construction site of dam or power plant. Negative was created to produce lantern slides of the four images.
Photograph negative is a copy of four photograph prints, showing: partially constructed tunnel opening; wooden buildings at edge of water; construction of tunnel opening, showing men operating monitors; and interior of concrete portal and tunnel for Coquitlam Dam. Negative was created to produce lantern slides of the four images.