Standard Kilogram Weights: A Story of Precision Fabrication

By F. J. Smith

doi:10.1595/003214073X1726668

ISSN: 0032-1400

oa Standard Kilogram Weights

A Story of Precision Fabrication
By By F. J. Smith¹
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Affiliations: ¹ Johnson Matthey & Co Limited, London
Source: Platinum Metals Review, Volume 17, Issue 2, Apr 1973, p. 66 - 68
DOI: https://doi.org/10.1595/003214073X1726668
- Published online: 01 Jan 1973

Abstract

The original metric standard of weight adopted in 1799 was a kilogram fabricated from platinum. The presentinternational standard kilogram was made nearly a century ago from 10 per cent iridium-platinum. Johnson Matthey was deeply concerned with this work and since then has regularly supplied further national prototypes and working standards toastrict specification.

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1973-01-01

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References

D. McKie, “Antoine Lavoisier”, Constable, London, 1952, 335 pp. [Google Scholar]
D. McDonald, “A History of Platinum”, Johnson Matthey, 1960, 127–129 [Google Scholar]
D. McDonald, Platinum Metals Rev., 1968, 12, (4), 142–145 [Google Scholar]
D. McDonald, “A History of Platinum”, Johnson Matthey, 1960, 207–213 [Google Scholar]

/content/journals/10.1595/003214073X1726668

Standard Kilogram Weights

Platinum Metals Review 17, 66 (1973); https://doi.org/10.1595/003214073X1726668

/content/journals/10.1595/003214073X1726668

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Article Type: Research Article

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oa Standard Kilogram Weights

A Story of Precision Fabrication

Abstract

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