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Man with a recording mercurial barograph, an instrument made and perfected by the U.S. Weather Bureau which measures, on a magnified scale, the fluctuations in the pressure of the air
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Man with a recording mercurial barograph, an instrument made and perfected by the U.S. Weather Bureau which measures, on a magnified scale, the fluctuations in the pressure of the air

Harris & Ewing · 1936-01-01 · photo, print, drawing

From the collection of Library of Congress. Free to download, adapt and use — no permission needed.

Subjects
glass negativesunited states
Credit lineMan with a recording mercurial barograph, an instrument made and perfected by the U.S. Weather Bureau which measures, on a magnified scale, the fluctuations in the pressure of the air. 1936-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.
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