The distinctive point
UK draught beer, one-third pint: a rule rather than an average
The matrix treats this value as exact because its recorded basis is one-third-imperial-pint. The interesting distinction is epistemic: a defined standard can be converted without an uncertainty band, while reconstructed ancient standards cannot inherit that certainty.
Basis: one-third-imperial-pint. Check the record source.
- smallerUK still-wine glass (175 mL)1.0824 × UK still-wine glass (175 mL)
- largerUK draught beer, half pint1/1.5 of UK draught beer, half pint
What this unit was
UK draught beer, one-third pint is modelled here as a liquid standard of the UK trade measure tradition, associated with United Kingdom during Current specified quantity. The converter represents one ⅓ pt as 0.18942042 L; its basis is one-third-imperial-pint. This is a defined or exact matrix anchor.
Within that setting, the unit belonged to a working system for storage, rations, trade, and the circulation of drink or other commodities. It should be read with its period, locality, and evidential basis attached, not as a universal value shared by every culture using a similar name. A vessel name is not automatically the capacity of every surviving vessel.
Evidence of use and sources
The working value is traceable to GOV.UK specified alcohol quantities. Its record is classified as exact confidence and uses the stated basis rather than an assumed culture-wide constant.
Three directly pertinent excerpts from the supplied library are available.
“the use of grains of corn as a means of expressing small weights is very ancient”
British weights and measures as described in the laws of England from Anglo-Saxon times, PDF p. 22. small-weight practice
“Avoir de poiz weight is to be used for other commodities, for Merchandize, and for Grocers.”
A dictionary of weights and measures for the British Isles, PDF p. 51. commodity trade
“every barrel for ale shall contain xxxii. gallons”
A dictionary of weights and measures for the British Isles, PDF p. 61. regulated cask capacity
Working definition
UK draught beer, one-third pint is represented as a UK trade measure standard associated with United Kingdom during Current specified quantity.
The converter uses 0.1894204167 L per unit.
How to use it
Basis: one-third-imperial-pint; confidence: exact. A shared historical name does not make this value portable to another period or polity.
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