PSN-L Email List Message

Subject: Re: R: ECLIPSE NOW !
From: aheerfor@......
Date: Wed, 11 Aug 1999 13:59:38 +0200


>
Hi !
I would like to know if you have recorded some variation of the trace of
your pendulum during the eclipse.
Thank you !
Giovanni

<

Hmm, yes I have. Before the eclipse the rotation of the azimut seemed to
have a fixed rate.
During the eclipse, this rate seemed to be near zero.

However, I am not very happy about the accuracy of my measurements. One
should really spend months on this experiment  and considerable money to
perfect the measurements, and not a few hours, as I have done. One should
not place too much trust in my measurements.

If anything, these experiments gives you a healthy respect for the effect
of hinges and suspensions on pendulums, which can be transferred to
seismometers. It is very diffucult to make a perfect suspension, and I wont
claim that I succeeded in this.

Regards, Anders



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Larry Cochrane <cochrane@..............>