On Sep 8, 2007, at 10:39 AM, Jones Beene wrote:
--- Horace Heffner wrote:
One dry pile, the Clarendon Dry Pile has been in
operation more than 160 years:
Wow. This is the first time I've seen this.
"The frequency of its oscillation is about 2Hz; so far
the bells have been rung of the order of 10 billion
times."
Yes. "... the owner of the device mentioned that the clapper-bead
was starting to take on a distinct hourglass shape, and may need to
be replaced in the next few centuries!"
http://amasci.com/emotor/duluc.html
Horace Heffner
http://www.mtaonline.net/~hheffner/
