In continental Europe, 20ᵗʰ century, a unit used in refrigeration. Symbol, fg. It is found in two different, highly-related forms:

The unit went out of use because of its small size.

In 1971, the European Economic Community directed that use of this unit cease by 31 December 1977

CIPM 1950.

1. European Economic Community, Council Directive of 18 October 1971 on the approximation of the laws of the Member States relating to units of measurement (Directive 71/354/EEC), Annex, Chapter III.

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