| | Metric system information - Search.com |
 | | The metric system was first introduced in late 18th century France by the chemist Lavoisier to replace the disparate systems of measures then in use with a unified, natural and universal system. |
 | | The gram, originally one millionth of the mass of a cubic metre of water, is currently defined by the mass of a specific object that is kept in a vault in France; however there are efforts underway to redefine it in terms of physical quantities that could be reproduced in any laboratory with suitable equipment. |
 | | The traditional system, originally Babylonian, has 360 degrees in a circle, 60 minutes of arc in a degree, and 60 seconds of arc in a minute (the clarifier "of arc" is dropped if it is clear from the context that we are not speaking of minutes and seconds of time). |
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