Re: Bubble in Compass
Jess Olonoff (jolonoff@GATE.NET)
Tue, 2 Jul 1996 12:03:22 -0400
As we all know liquids including water and or glycerin (used to fill
better gauges etc. although I'm not sure if it is used to fill compasses)
expand and contract as temperature changes.
Given cold enough conditions the glycerin will freeze as well as the water
but at a lower temperature.
The bubble allows room for the expansion of the fluid contained within the
compass so it will not be damaged when used in extreme conditions; at
least hopefully the face will not crack allowing the fluid to leak when it
That's the explanation I learned 30 or so years ago and I'll stick by it.
Jess Olonoff, CM Pack-206 | Eagle - 1970, T-10 Tulsa, Okla.
Mary Help of Christians | Ta-Tsu-Hwa - Ordeal '69, Brthrhd '70
Parkland - Coral Springs, FL | Scout NYC-Brooklyn 61-66, Tulsa 66-71
Lighthouse Dstrct., S.FL. Council | Scouter Boca Raton 73-74, Parkland 94-
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