This is the transmitter for an instrument that was introduced in 1904 by Charles F. Marvin, a physicist who joined the federal weather service in the early 1880s, and rose to become Chief of the Weather Bureau. That organization transferred it to the Smithsonian in 1954, noting that it had been used at Columbus, Ohio. The clock movement is marked “SETH THOMAS.”
Ref: Roy Norton Covert, Instructions for the Installation and Maintenance of Marvin Water-Stage Registers (Washington, D.C., 1921).
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