Diagram of modern locks
Black and white lantern slide of a hand-drawn sketch diagram of canal lock systems.
circa 1918-1921
In Copyright
Grand Valley State University. University Libraries. Special Collections & University Archives
Merrill_LS00147
image/jpg
Image
eng
Merrill, Robert H., 1881-1955, “Diagram of modern locks,” Digital Collections, accessed May 4, 2024, https://digitalcollections.library.gvsu.edu/document/52605.