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There is no origin for Demijohn. I think it's italian. Damigiana.

It's still called a dame jeanne in Belgium. —Preceding unsigned comment added by (talk) 13:09, 12 November 2007 (UTC)

The French Article tells the story of Queen Joan of Naples who was passing through the hamlet of Saint Paul la Galline Grasse in 1347 and requested to view some glassblowing. The master glassblower promptly created a bottle of unheard of dimensions (~10l). Seeing the success of his experiment, he then wanted to start a fabrication of these vessels under the name of reine-Jeanne (= Queen Joan), but the queen requested to moderate the name to dame-jeanne. This is the main content of the story as loosely translated from aforementioned french article for the benefit of anyone who can't read french. But since I don't have any proof of the likely connection between dame-jeanne and demijohn I'll just leave it here instead of putting it into the article. Anyways, I don't know how flattering it is for a lady to have a huge vat of Wine named after her... :-) --BjKa (talk) 09:59, 26 January 2010 (UTC)

This whole discussion page epitomises all that is wrong with Wikipedia ! Currently very US centric (and why not?) but no allowance for other forms of English yet only one English version! At least three words redirect to this page, why no one knows? I personally have never heard the term carboy. Contributions are haphazard, incomplete and in the main heresay or what somebody may have read elsewhere. Useful as a source of factual information, No! Useful as a starting point to establishing the facts, maybe. Anybody can contribute and edit with no real control over the collective. In the end no better a starting point then going to a search engine of your choice and typing the words in and reviewing the articles that appear ignoring the paid for ads and the first page since this has usually been manipulated by a commercial organisation! Several good dictionaries (in book form) are reliable and worth their weight in blood, sweat and tears! — Preceding unsigned comment added by (talk) 10:04, 8 August 2017 (UTC)


This page is wrong. I have always understood that a demijohn and a carboy were specific volumes of glass bottles and not synonymous. I do not have a reference on hand, but a carboy was about 19.something liters and a demijohn was about 54 liters. Sorry if I can not be of more help, most dictionaries are very general and I am talking about a specific point. [Patrick Hung, not a registered user, 13/09/09] —Preceding unsigned comment added by (talk) 07:45, 13 September 2009 (UTC)

'A 15 gallon carboy is often called a demijohn' - weasel wording. It's not in the UK, as subsequently mentioned. Can someone find a reference and more specific detail?-- (talk) 15:09, 9 November 2009 (UTC)

I'd add to that that carboy and demijohn don't appear to be the same thing. They're liquid containers, but the words are used for different (if overlapping) purposes in different areas about different things. One of the uses of carboy suggests it's a large liquid container not always related to brewing; the British use of demijohn is very specific in its meaning.-- (talk) 15:18, 9 November 2009 (UTC)

I would like to add that the page is not self-consistent. The introduction says "A carboy is a rigid container with a typical capacity of 5 to 15 gal" whereas the brewing section says "Carboys come in various volumes ranging from 1 gallon to 6.5 gallons". Does anyone have a good reference which could be used here? I don't have anything reliable, but I believe that a demijohn is 1 U.K. gallon and a carboy is bigger ( (talk) 20:04, 26 January 2010 (UTC)).

I'm a homebrewer and certified beer judge in the U.S. and have never heard anyone refer to the carboys we use (typically 3, 5, or 6.5 U.S. gallons) as demijohns. I'm stopping short of removing that wording, though, because I don't know what a demijohn is. Also, why does jimmyjohns redirect here? (talk) 19:33, 23 December 2010 (UTC)

I fixed the UK reference to refer to imperial gallons; other references are US-centric ("1.25 gallons" for 4.5 liters). Can somebody who touches these things confirm they're from a US or UK tradition, and mark/change gallons to imperial gallon or US gallon? nop (talk) 15:55, 9 June 2013 (UTC)

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