Bob Holmström, Editor, 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., 11929 East Hill Drive, Chesterland OH 44026 Phone: 440-729-4811

Ernie Martt, Founding Editor, Phone: 440-247-6712, Phone: 440-247-6712 <emartt@cyberdrive.net>

A Horological Science Chapter meeting will be held at the NAWCC Seminar in Minneapolis 7 p.m., Friday October 29th with presentations on Member Projects. An Antiquarian Horological Society meeting will follow at 8 p.m.

Page Contents

1 index of this issue.

2 Early beginnings of the Horological Science Chapter of NAWCC as recalled by Evan Edwards

3 Period Variation in an Electronically Maintained Clock by Robert Belleville

11 Pendulum Air Movement: A Failed Experiment by Robert Matthys

14 Phase Shifts in a Single-Coll, Sinusoidal, Pendulum Drive Circuit by Ned Bigelow

16 The compound cycloidal pendulum by Philip Woodward

17 "Smooth" Electromagnetic Impulse Without Electronics by Alan W. Heldman

19 Turbulent Discussions of Pendulums by Alan W. Heldman

19 "Comment on BellVille HSN 99-3" by Alan W. Heldman

20 Simplifying the drive circuit! (of HSN 1999-3) by Dallas Cain

21 reprint - "Spring Suspensions for a Pendulum" by Fedchenko & Fleer

26 Errata and Addenda to "Muchless" Article, HSN 99-3 by Ned Bigelow

26 Errata - Some Mathematics of the Cantilever Pendulum by Alan Emmerson

26 Comment on CDROM/web version of HSN by the editor

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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