From the HBD Archive
From: roberts%studguppy@LANL.GOV (Doug Roberts)
Subject: honey aroma and SOME wierd barley wine
Date: 1990-04-06 14:54:19 GMT

> the sg dropped to 1.025, then
> climbed gradually up to 1.030 where it is holding constant at present. Can]
> anyone speculate on how sg can dip and then climb up again under these
> conditions? Can water evaporate out of an air-locked carboy?

The only time I've seen this happen is when I forgot to give the
hydrometer a good spin to shake off the bubbles that had stuck to it.
I've seen an error of 5 associated with an extra buoyant hydrometer,
especially with a sample that is still fairly active.

- --Doug

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