[time-nuts] Hello

Hal Murray hmurray at megapathdsl.net
Thu Mar 29 06:30:08 EDT 2007

> Not sure what you mean by "current" pendulum clocks. I think modern
> commercial pendulum clocks are nowhere as accurate as the
> state-of-the-art pendulum clocks of the 1920's.

I was thinking of serious (crazy/nutty) amateurs, assuming they would be 
better than what is now available commercially.

> Yes, it is a neat benchmark. Not a few modern clock makers have tried
> to reproduce or improve on the old masters. It turns out a pendulum
> clock needs to be accurate (stable) to 1e-7 or 1e-8 for tau from an
> hour to a day in order for it to "detect" tides. See this article I
> wrote a while back on the subject:

>     Lunar/Solar Tides and Pendulum Clocks (part 1)
>     http://www.leapsecond.com/hsn2006/ch1.htm 

Nice.  Thanks.  Did you ever write chapter 2?

These are my opinions, not necessarily my employer's.  I hate spam.

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