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 background. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Concrete mixers Concrete construction Concrete Construction Construction workers--United States Platforms Reservoirs Trees Photographic prints. (gmgpc)
If you're wondering about permissions and what you can do with this item, a good starting point is the "rights information" on this page. See our terms of use for more tips.
Share your story
Has Calisphere helped you advance your research, complete a project, or find something meaningful? We'd love to hear about it; please send us a message.