Aufruf : double leaf broadside, 1912.
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Physikalisch-Technische Reichsanstalt (Germany)
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The Physikalisch-Technische Reichanstalt, founded 1887, was the leading state-run metrological institute, with achievement not only in metrology, but also in physics. Today it is called the Physikalisch-Technische Bundesanstalt. From the description of Records of the Federal Institute of Metrology (Germany), 1887-[ongoing]. (Unknown). WorldCat record id: 81803343 As a non-teaching establishment with a staff engaged in full-time research, using expensive equipment and facilit...
Siemens, Werner von, 1816-1892.
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