Terminus Est

Jeff Wilson · 02 Jul 2008, 14:05 · from 2008-July.txt.gz

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From: jwilson at io.com (Jeff Wilson)
Date: Wed, 02 Jul 2008 09:05:25 -0500
Subject: (urth) Terminus Est
In-Reply-To: <187334.31927.qm at web83722.mail.sp1.yahoo.com>
References: <187334.31927.qm at web83722.mail.sp1.yahoo.com>
Message-ID: <486B8B25.5070502 at io.com>

John Smith wrote:
> Another problem:  If
> the empty part of the channel is filled with air, the
> pressure of the air would impede the mercury from
> flowing freely when the sword descends.   The empty
> area needs to be a vacuum.

This is exactly how Toricelli made a vacuum in 1643, the tube being 
equal in length to TE.

-- 
Jeff Wilson - jwilson at io.com
< http://www.io.com/~jwilson >

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