Join Date: Nov 2008
Location: Deale, MD
Thanked 84 Times in 83 Posts
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Place 90 ml in a 100 ml graduate. Add 10ml water. If more than 10 ml drop out, the balance is ethanol. The ethanol trade association had this on their web site, but removed the page (dead link). This is basically what the cheap test kits do, and it is accurate enough for this purpose.
(when asked how he reached the starting holds on a difficult rock climbing problem that clearly favored taller climbers - he was perhaps 5'5")
"Well, I just climb up to them."
by Joe Brown, English rock climber
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