[time-nuts] Obscure terms
Neville Michie
namichie at gmail.com
Fri Aug 21 08:37:30 UTC 2009
One more great unit, still may be used in brewing
beer is the degree Twaddle. = 1.005 SG.
This is a density measure, the hydrometer, so I remember.
is calibrated by dissolving one ounce quantities of copper
sulphate in a gallon of water.
What a great way of maintaining accuracy when
there is not a standards lab next door.
cheers, Neville Michie
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