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Date Posted: Thursday, August 28 2008, 15:06:15
Author: Fred
Subject: Re: mercury lens floation
In reply to: Bob Pass 's message, "Re: mercury lens floation" on Thursday, August 28 2008, 6:19:31

I cannot help with the theory,but can confirm that it is at atmospheric pressure and no seals are used.
If for any reason mercury was drained from the trough,it was topped up by pouring the mercury between the lens and outer edge of the trough until it floated at the right height.

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