Research station Goldhöhe in the Bohemian mountains 1938.
A standard kilogram weight kept by the National Institute of Standards and Technology, USA, one of two which serve as the official standard for defining all units of weight and mass in the United States. It is 39 mm in diameter and 39 mm high, made of 90% platinum - 10% iridium alloy. It is an exact copy of the international prototype kilogram kept at the Bureau International des Poids et Measures in Sevres, France It was one of 40 copies which were made in France in 1884 and distributed to different nations as national standards. This is copy No. 4. It differs in mass from the prototype kilogram by about 75 micrograms. Alterations to image: removed aliasing artifacts due to scanning of original halftone picture, using FFT filter.
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Kurt Herdemerten during the Herdemerten-Greenland-Expedition 1938.
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Hans-Robert Knoespel with a polar falcon during the Herdemerten-Greenland-Expedition 1938.
Weights and Measures Seal applied to a worn Las Vegas gasoline pump
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Russian Federation, Ministry of Industry and Trade. The Honorary Title of
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Testbed Lead Renaud Goullioud stands in front of the Microarcsecond Metrology (MAM) testbed.
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Company view of Micro-Epsilon
Racked Calibrated Test Equipment: An oscilloscope, digital multimeter and control panel are shown. Stimulus is applied to the test equipment from the back side, through the Test Point matrix. This equipment is committed to a specific metrology test, facilitating limited calibration.
A computer-generated image of the International Prototype kilogram (IPK), which is made from an alloy of 90% platinum and 10% iridium (by weight) and machined into a right-circular cylinder (height = diameter) of 39.17 mm. The IPK is kept at the Bureau International des Poids et Mesures (International Bureau of Weights and Measures) in Sèvres on the outskirts of Paris.
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