...strictly equivalent to it. The mass which has thus been selected as a standard is a piece of platinum which is kept at the International Bureau of Weights and Measures near Paris. It is known as the Standard Kilogram, or the Kilogramme des Archives. All that is meant, therefore,...

...Convention about 1889, after being carefully compared with one another so that their relative errors were accurately known. One of these, which is kept...is known as the international prototype metre and gives the same length as the original flat platinum bar constructed for the French Government by Borda...

...at the temperature of melting ice, between two lines ruled on a certain bar of platinum and iridium which is kept at the International Bureau of Weights and Measures near Paris. Accurate copies of this bar are preserved at Washington and at the capitals of many other countries...

...metric system, is defined as the distance at 0°C. between two lines ruled on a bar of platinum that is kept at the International Bureau of Weights and Measures near Paris. A unit of measure that has been accurately defined and that is widely known and used is called a standard...

...(platinum-iridium) known as a Kilogram. The international prototype kilogram, like the Standard Meter, is kept at the International Bureau of Weights and Measures, near Paris. "National prototypes" of both standards are kept at the Bureau of Standards in Washington. * R in the...

...mass of metal (an alloy of platinum-iridium) known as a Kilogram. The international prototype kilogram is kept at the International Bureau of Weights and Measures, near Paris. 33. Density. — The ratio of mass to volume of any particular V body is caljedjts density^. In otHeFwords,...

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