National Association of Watch and Clock Collectors, Inc.

Horological Science Chapter #161

Issue 1997-1 February 1997

Ernie Martt, editor. 278 Bentleyville Rd. Chagrin Falls, OH 44022 USA

Phone: 216-247-6712, E-mail: emartt@cyberdrive.net

Sec. &: Pub.: Bill Givens, PO Box 1337, Eugene, OR 07440 Phone: 503-465-9312; E-mail: ibanks@ix.netcom.com

Treas.: Everett Jones, 11929 East Hill Drive, Chesterland OH 44026 Phone: 216-729-4811

For those who receive notices, dues are due for 1997. Otherwise ignore this. Subscriptions are now $15 US $20 Can.. 10 Pounds Sterling. The price increase allows us to have large issues when needed. rather than cut back.

Page Contents

1 Index, dues notice

2-3 Dom Viglione describes My Suitcase Model Focault Pendulum ?a novel application for a bar stool!

4 Shrink Fit Attachment To Quartz Rods by Ned Bigelow. Best Yet?

5-9 George Feinstein sent an unpublished article by John Early Jackson on Analytic Treatment of Effect of Support Movement on Frequency of a Pendulum. While the problem is treated nicely by Rawlings, Jackson has a somewhat different approach, clearly done.

10 Review: Mechanics of the Sandglass by three members of The University, Leicester. This was sent by Patty Atwood. A little out of our line, but interesting. Numerous references, one from the NAWCC Bulletin and also from The Time Museum's publication Water Clocks, Sandglasses and Fire Clocks.

11-13 Ken Friedenthal writes on Random Disturbances and the Allan Coefficient, stimulated by a comment on the effect of a chestnut tree on Prof. Hall's clock (HSN 19964). This is an approach independent of Phillip Woodward's articles on Pendulums In a Noisy Environment in the Horological Journal, Aug., Sept., & Oct. 1996, but related.

14-15 Bob Matthys has been reviewing old Horological Journals back to 1900 and earlier; he summarizes articles that may be of interest to HSN readers. Most of us in the US do not realize how old some of our "new" ideas are.

16 Ned Bigelow discusses Transient Temperature Compensation in relation to below-the-bob compensators.

16 Gordon Uber brings us up to date on Internet activities.

Ernie Martt

Above: Drawing from Apians Cosmographicus Liber of 1533, showing how a nocturnal is used to tell the time at night from the Great Bear.

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