Item Types Photograph

Any images made from a photographic print or negative, including stereoviews, glass or film negatives, tintypes, daguerreotypes, and other photographic processes.

Finished Upper Roxborough filters, 1903

Finished Upper Roxborough filters, 1903

Upper Roxborough filter beds

Upper Roxborough filter beds under construction, July 1902

Two bottles of water from a river, one dark with pollution and one clear after filtration

Water Before and After Roxborough

Black-and-white photograph showing the completed Upper Roxborough Filter system. Vaulted concrete ceiling with beds of filter sand.

Upper Roxborough Filter Beds Complete, 1903

1902 photo of Upper Roxborough Filter beds under construction

Upper Roxborough Filter Bed Construction, 1902