United States. National Bureau of Standards
Published: 1917
Total Pages: 20
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In response to many urgent requests for a concrete realization of a series of standard temperatures, which would be available to anyone anywhere for the standardization of pyrometers and for the reproduction of the standard scale of temperature for use in laboratory and industrial works, the Bureau has had prepared a series of pure metals, of which it has made chemical analyses as a check on the degree of purity realized, together with exact determinations of the respective melting or freezing points.
