Construction of concrete foundation floor for water reservoir, Mount Wilson. Four unidentified construction workers are working within the reservoir construction site; one weilds a wheelbarrow while another uses a smoothing tool. The poured...
Concrete machine for the construction of large water reservoir on Mount Wilson. An unidentified construction worker stands on top of the concrete mixer. Around the mixer is a wooden platform, in addition to other tools and buckets. Trees are in the...
Pouring concrete into forms for the construction of a water reservoir, Mount Wilson. Two unidentified construction workers hold a wheelbarrow and pour concrete into the wooden forms around the perimeter of the reservoir site. Trees are in the...
Concrete mixer and several unidentified construction workers, building a water reservoir on Mount Wilson. One construction worker is seen standing on top of the concrete mixer itself. A wheelbarrow sits on the ground to the right of the mixer; an...
Two construction workers and a concrete mixer, Mount Wilson. Construction of a large water reservoir is underway. The construction worker on the left is standing on a wooden platform; the worker on the right is holding a wheelbarrow to catch wet...
Construction of the foundation for a large water reservoir, Mount Wilson. Two unidentified construction workers stand in the formwork for the reservoir's foundation, pouring concrete from a wheelbarrow. Three other unidentified construction workers...
Concrete mixer for construction of a water reservoir, Mount Wilson. Four unidentified construction workers are posed around the concrete mixer and surrounding construction equipment. Wooden scaffolding and platforms have been built around the...
Pouring concrete for walls of large water reservoir, Mount Wilson. Three unidentified construction workers are seen with a wheelbarrow and a shovel, pouring concrete along a wooden chute into the wooden and wire formwork. Trees are in the...
pouring concrete for walls of large water reservoir, Mount Wilson. Three unidentified construction workers stand on a wooden platform, emptying a bucket of concrete into a wheelbarrow. They are near the construction site for the large water...
Construction of walls for large water reservoir, Mount Wilson Observatory. The 150-foot tower telescope is visible in the background. Several unidentified construction workers pour concrete into the formwork for the reservoir's walls. A bucket...
Construction of the monastery annex as seen from the courtyard, Mount Wilson Observatory. The Monastery served as a dormitory for visiting scientists. In this photograph, one sees the scaffolding and construction of the second-story walls of the...
Construction of Monastery annex as seen from east, Mount Wilson Observatory. The monastery served as a dormitory for visiting scientists. In this photograph, the construction of the annex's second-story walls is underway. Scaffolding surrounds the...
Construction of the first floor of a new wing of the Mount Wilson Observatory office building, Pasadena. Concrete bricks form the walls. An unidentified construction worker is seen working in front of the construction; he stands near a concrete...
The papers provide a unique perspective of 20th century California history and American business history and more specifically, a view of business practices in Los Angeles. The Business Files, the largest series of the collection has 6,436 items....
Construction of the new Mount Wilson Observatory office building, Pasadena. Excavation shows concrete being poured for basement. The handwritten caption below the photograph reads: "S.B.S. Office building. Sub-basement : rooms for ruling engines....
Construction of a water reservoir, Mount Wilson. Several unidentified construction workers stand near the formwork for the concrete foundation. The concerete mixer is seen on higher ground, above the construction site.
Construction of the foundation floor for large water reservoir, Mount Wilson. Four unidentified men are working within the reservoir site, one is wheeling a wheelbarrow, and another is smoothing freshly poured concrete with a tool. The wire mesh...
Construction of walls for large water reservoir, Mount Wilson. Three unidentified construction workers work near the perimeter of the reservoir, pouring concrete from a wheelbarrow into the wood and wire forms. The formwork for the reservoir walls...
Construction of monastery annex as seen from the east, Mount Wilson Observatory. The Monastery served as a dormitory for visiting scientists. In this photograph, the annex is being constructed; the first-story concrete walls are complete and...