Ted-

I want to apologize to you and the list for sending a message for Chris
Chapman to the whole list (I just hit reply without seeing who it was
replying to). I have been interested in Earth tides and have wanted to make
an instrument to measure them. C. L. Strong originally had an article on
making a tiltmeter based on two mercury-filled cups connected by a tube and
measuring the level by a capacitance gauge, "A sensitive mercury tiltmeter
that serves as a seismometer" Scientific American, November 1973, pp.
124-129. The electronics were updated by an article in Nuts & Volts by Ron
Newton, "Measure Earth Tides with a Tiltometer" I ordered a board from Ron,
but was unable to make it work. I have just completed a circuit suggested
by Chris based on the Linear Technology LTC 1043 chip and the email to
Chris was to let him know how it was working.

Check my website at http://ntweb.mcn.org/gbush/Tiltmeter/tiltmeter%20Main.html
 for further info on my project and references.

At 11:59 AM 4/4/2007 -0600, you wrote:
>Hi George,  This is interesting.  Where can I find articles to read more 
>about the basic principle. etc.   Thanks, Ted
....snip...
George
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