National Standard Of Mass, Kilogram #2
by NIST/Science Source
Title
National Standard Of Mass, Kilogram #2
Artist
NIST/Science Source
Medium
Photograph - Photograph
Description
This is a replica showing the size and shape of the kilogram standard. The replica is in a glass dome. The standard for the kilogram unit of mass is a cylinder of platinum-iridium alloy kept by the International Bureau of Weights and Measures near Paris. A duplicate kept at National Institute of Standards and Technology serves as the mass standard for the United States.
Uploaded
August 3rd, 2015
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