Henry David Hubbard (1870-1943), physicist at the U.S. National Bureau of Standards, designed the first edition of the "Periodic Chart of the Atoms" in 1924. The chart, visible in this photograph on the wall behind his desk, is still in use today, continually updated to reflect new elements. At the right, leaning against the wall, appears to be an engraving of nineteenth-century Russian chemist Dimitry Ivanovich Mendeleev (1834-1907), who had developed several charts grouping chemical elements according to common properties.
Smithsonian Institution Archives, Accession 90-105, Science Service Records, Image #SIA2008-4031
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