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National Association of Watch and Clock Collectors, Inc.
Horological Science Chapter #161
Horological Science Newsletter
Issue 2000-2 April 2000
Bob Holmström, Editor, 2934 NW 53rd Drive, Portland, OR 97210 Phone: 503-292-3685, <holmstro@europa.com>
Bill Givens, Sec. &: Publisher, 3850 Ashford Dr., Eugene, OR 97405 Phone (H): 541-465-9311 <Lbanks@ix.netcom.com>
Everett Jones, Treas., Phone: 440-729-4811
Ernie Martt, Founding Editor, Phone: 440-247-6712, Phone: 440-247-6712 <emartt@oh.verio.com>
Page Contents
1 Index of this issue.
2 - 16 Effects of Weather on a Wooden Clock by David Bailey
17 - 18 Regulating a Compound Pendulum by V.T. Norwood
19 - 23 Effect of Knife Edge Shape on Pendulum Rate versus Amplitude by Ned Bigelow
24 - 27 Effect of Humidity on Wood Pendulum Rods by Alan Heldman
28 - 31 Measuring the Critical Geometric Parameters of a knife-edge Bearing by Leon H. McGurk
There are no new Rock the Boat items in this issue. These are meant to be comments no longer than
half a page on horological topics, including controversial ones, but not personal. This is a quick way
to write a short article, convey an important idea or ask a question.
I currently have commitments for 3 articles to be published in the special issue of HSN relating to temperature
compensation. These articles will appear in HSN 2000-3. Please contact me if you are interested in contributing
additional material for this issue. The deadline for material to be submitted is June 1, 2000.
Request for articles: New material is always needed and appreciated. Are you or someone you know working
on something that would interest our readership? Please contact me if you need help getting your ideas
and work into print.
Bob Holmstrom
CLOCKS and TIME / NAWCC
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