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  2. Stone (unit) - Wikipedia

    en.wikipedia.org/wiki/Stone_(unit)

    The stone or stone weight (abbreviation: st.) [1] is an English and British imperial unit of mass equal to 14 avoirdupois pounds (6.35 kg). [nb 1] The stone continues in customary use in the United Kingdom and Ireland for body weight. England and other Germanic -speaking countries of Northern Europe formerly used various standardised "stones ...

  3. Stone Age - Wikipedia

    en.wikipedia.org/wiki/Stone_Age

    The Stone Age was a broad prehistoric period during which stone was widely used to make stone tools with an edge, a point, or a percussion surface. The period lasted for roughly 3.4 million years [1] and ended between 4000 BC and 2000 BC, with the advent of metalworking. [2] It therefore represents nearly 99.3% of human history.

  4. Pound (mass) - Wikipedia

    en.wikipedia.org/wiki/Pound_(mass)

    The pound or pound-mass is a unit of mass used in both the British imperial and United States customary systems of measurement.Various definitions have been used; the most common today is the international avoirdupois pound, which is legally defined as exactly 0.453 592 37 kilograms, and which is divided into 16 avoirdupois ounces. [1]

  5. Jon Brower Minnoch - Wikipedia

    en.wikipedia.org/wiki/Jon_Brower_Minnoch

    Jon Brower Minnoch (September 29, 1941 – September 4, 1983) [2] was an American man who is the heaviest recorded human in history, weighing approximately 1,400 lb (635 kilograms; 100 stone) at his peak. [3][note 1] Obese since childhood, Minnoch normally weighed 800–900 lb (363–408 kilograms; 57–64 stone) during his adult years.

  6. Three-age system - Wikipedia

    en.wikipedia.org/wiki/Three-age_system

    Jōmon pottery, Japanese Stone Age Trundholm sun chariot, Nordic Bronze Age Iron Age house keys Cave of Letters, Nahal Hever Canyon, Israel Museum, Jerusalem. The three-age system is the periodization of human prehistory (with some overlap into the historical periods in a few regions) into three time-periods: the Stone Age, the Bronze Age, and the Iron Age, [1] [2] although the concept may ...

  7. Imperial and US customary measurement systems - Wikipedia

    en.wikipedia.org/wiki/Imperial_and_US_customary...

    The definition of units of weight above a pound differed between the customary and the imperial system - the imperial system employed the stone of 14 pounds, the hundredweight of 8 stone [Note 6] and the ton of 2240 pounds (20 hundredweight), while the customary system of units did not employ the stone but has a hundredweight of 100 pounds and ...

  8. Metrication in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Metrication_in_the_United...

    Metrication is the act or process of converting to the metric system of measurement. The United Kingdom, through voluntary and mandated laws, has metricated most of government, industry, commerce, and scientific research to the metric system; however, the previous measurement system (Imperial units) is still used in society.

  9. Medieval weights and measures - Wikipedia

    en.wikipedia.org/wiki/Medieval_weights_and_measures

    ligne – 1⁄12 pouce 2.2558 mm. pouce – Inch, 1⁄12 pied 27.070 mm. pied – Foot, varied through times, the Paris pied de roi is 324.84 mm. Used by Coulomb in manuscripts relating to the inverse square law of electrostatic repulsion. Isaac Newton used the "Paris foot" in his Philosophiae Naturalis Principia Mathematica.