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...our main monetary systems of Germany: Austrian, South German, North German and Hamburg.<ref name=JPE/> ...o 18 grains.<ref name=Kelly>Kelly, Patrick (1821), ''The Universal Cambist and Commercial Instructor''. Vol 1. 2nd edn. London. p. 169.</ref> Thus 14 ''Lo ...

{{About|dense metallic elements|toxic metals|Toxic heavy metal|other uses|Heavy metal (disambiguation)}} ...ther [[metalloid]]s are included, vary depending on the author and context and it has been argued that the term "heavy metal" should be avoided.<ref name= ...

{{Short description|Origins and values of the unit of length}} ...ents were required, and scientists looked for measures that were universal and could be based on natural phenomena rather than royal decree or physical pr ...