Merrill, Robert H., 1881-1955, “Tientsin water filtration plant,” Digital Collections, accessed December 12, 2025, https://digitalcollections.library.gvsu.edu/document/52531.
Black and white lantern slide of a water filtration plant in Tientsin (Tianjin), China. A small building sits behind a pool of water, and a larger building with five smokestacks is visible in the distance.