Linie (Premetric Prussian)
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The Linie (meaning line) was the smallest Prussian unit of length or distance prior to 1872, when the German Empire was formed, and all traditional local systems were abolished in Germany.
Value in terms of the FussEdit
Since no actual Prussian standards are definitively known by the present day, the only way of determining the length of any Prussian unit would be to measure something in modern terms whose length was given by the Prussians in their units. And because this procedure does not give us any clue to which unit may have been the base unit and which were subsidiary units, this distinction really does not apply to the Prussian units here given, so all the units really have equal status. However, most references appear to have treated the Fuss (Prussian foot) as the base unit, expressing other units in terms of this unit. The Linie, then, can be considered as defined as ^{1}/_{144} Fuss (Prussian foot).
Relation to other Prussian unitsEdit
 12 Linien = 1 Zoll (Prussian inch)
Value in terms of modern unitsEdit
Based on the figure of 0.313857 m for the length of the Fuss, given by Cardarelli in his tabulation^{[1]}, the Linie was 0.0021795625 m = 0.0858095 in. .
ReferencesEdit
 ↑ Cardarelli, François (1998). Scientific Unit Conversion. Berlin, Heidelberg, New York: SpringerVerlag. ISBN 3540760229.