hist-brewing: hydrometers

[Kirsty Pollock]

Depends how fresh the egg is. As eggs age, the air cavity within gets bigger
and so the egg starts to float more. It's a way to judge whether an egg is
fresh, You put some salt ( a teaspoon I think ) in a glass of water and if
the egg floats, it's off.

So, only of use as a hyrdometer if you know when it was laid, which in past
times is probably not unreasonable. If you kept your own chickens, you would
know.


KP

> -----Original Message-----
> From: owner-hist-brewing at rt.com [mailto:owner-hist-brewing at rt.com]On
> Behalf Of -Tevildo.
> Sent: 16 January 2000 21:39
> To: hist-brewing at pbm.com
> Subject: Re: hist-brewing: hydrometers
> 
> 
> I know that eggs were used as hydrometers for a long while 
> before the modern 
> style was invented. By letting an egg float in the mix and 
> seeing how much 
> of the egg floated above the water level, it's possible to 
> get a rough 
> estimation of the fluid density.     -T.
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