Scientists & Inventors
Metric System Scientists


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1586: Simon Stevin (1548 - 1620), Flemish mathematician: proposed that all multiples and divisions of the base measurement units were factors of the power of ten.

1670: Gabriel Mouton (1618 - 1694), French abbot, mathematician and astronomer: proposed that all derived units use a common set of prefixes for each multiple. Thus the prefix kilo is used for mass (kilogram) or length (kilometre) both indicating a thousand times the base unit.

1668: John Wilkins (1614 - 1672), English clergyman and natural philosopher: proposed a decimal system of measure similar to the modern metric system and a "seconds pendulum" with a half-period of one second as the unit of length.

1860: James Clerk Maxwell (1831 - 1879), Scottish physicist and mathematician: proposed three base units - length, mass and time that from them all other units of measure, called derived units, were defined in terms of the base units.

1824: Nicolas Clement (17791842), French physicist and chemist: defined the calorie unit.

1862: William Thomson, British physicist and engineer, James Clerk Maxwell, Scottish physicist and James Prescott Joule, English physicist: suggested that units of electrical energy must have the same units as units of mechanical energy.

1888: Heinrich Hertz (1857 - 1894), German physicist: verified Maxwell's Equations and in so doing realised that the CGS system of electromagnetic units to were related to the CGS system of electrostatic units.

1861: Charles Bright, British electrical engineer and Latimer Clark, English electrical engineer: proposed the names of ohm, volt, and farad in honour of Georg Ohm, Alessandro Volta and Michael Faraday respectively for the practical units based on the centimetre-gramme-second absolute system.

1910: Charles Edouard Guillaume (1861 - 1938), Swiss physicist advanced the development of precision instruments.


Calculators and Convertors
Conversions - asknumbers.com
Mechanical Engineering Calculators - Mecheng Computing
Metric & Imperial Conversion - FPSI French Property
Measurements - AAA Math
Metric Conversions
Metric Converter - allmath.com
US/Metric Conversion Tables - allmath.com
Conversion Calculator - infoplease.com
Convert-me.Com
Martindale's Calculators On-Line Center
Calculators - OnlineConversion.com
Calculators - lii.org
Distance Calculator Between Cities and Countries - mapcrow.info

Metric System Resources
Metric System - Wikipedia
The Metric System - KryssTal
Go Metric - U.S. Metric Association (USMA)
The Metric System
A Dictionary of Units of Measurement

Metric System Timelines
A Chronology of the SI Metric System - USMA

The Metric System on Stamps
Instruments and Measurements - Buffalo University


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