Hi Brian,
I think it was removed in sections and re-assembled. Thanks for looking.
--Graham
----- Original Message -----
From: "Brian Swale" <bj@xxxxxxxxxxxxxxx>
To: "GeeBee" <geebee@xxxxxxxxxxxxxxx>; <olympus@xxxxxxxxxx>
Sent: 07 June 2005 05:01
Subject: [OM] Re: #172
>
> Hi all
>
> Graham wrote
> >
> > The circle on the bank is a section from the middle tunnel removed
during
> > repairs. The protrusions on the inner circle mark the water level. It
> > doesn't look deep enough for long boats, high enough for headroom or
wide
> > enough for two boats to pass but all three are obviously factored in.
> >
> > Olympus OM2 SP : Zuiko 21mm f2 : green filter : Kodak T400CN
> > http://www.geebeephoto.com/2005/05172.htm
> > Graham
> > http://geebeephoto.com
>
> Now, I'm no mathematician, but I can visualise things very well.
>
> If that thing on the bank is a circle, and it looks like it, and it once
was part
> of the inside wall of the tunnel, presumably the rest of the tunnel has
the
> same set of dimensions. In order to extract it from the tunnel, the
inside
> diameter of the tunnel would have to be not only equal to the exterior
> diameter of the ring, but actually slightly larger.
>
> So that supposition appears to be a physical impossibility, unless the
> section was removed vertically through a hole from above..
>
> Interesting problem.
>
> Brian
>
>
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