National Association of Watch and Clock Collectors, Inc.
Horological Science Chapter #161
Horological Science Newsletter
Issue 1999-2 March 1999
Ernie Martt, Editor, Phone: 440-247-6712, Phone: 440-247-6712 <firstname.lastname@example.org>
Bob Holmström, Associate Editor, Phone: 503-292-3685, <email@example.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
A hearty welcome to Bob Holmström as an associate editor and also thanks for being willing to produce
An HSC meeting will be held at the NAWCC National at 4pm, Thurs., June 24, with member-contributed topics.
The AHS meeting will be at 5 pm, Fri. June 25, Gerald Marsh speaking.
Rock the Boat comments have been relocated to the end of this issue. These are meant to be comments
no longer than half a page on horological topics, including controversial ones, but not personal. A
quick way to write a short article, convey an important idea or ask a question.
1 Index of this issue.
2-13 Pendulums Revisited by Alan Emmerson.
14-17 Using a GPS Receiver to measure precision pendulums by Bryan Mumford.
18-22 Solid One-Piece Suspension Springs by Robert Mathys
23-25 Did Riefler Read Eiffel? by Alan Heldman.
26 Comments on Chaos Theory by Alan Emmerson.
27 Philip Woodward's reply to Alan Heldman
28-29 A Discussion Paper on Electromagnetic Drive by Ted Wale
30 A Philosophical Treatise on HSN Issue 1999-1 by Paul Hopkins
31 More Querys About Q - a response by D A Bateman
32 The Water Pendulum comments by Philip Woodward
32 Rock the Boat - Can Experiments Add Some Useful Facts to the Q Debate by Bob Holmström
Above: Drawing from Apians Cosmographicus Liber of 1533, showing how a nocturnal is used to tell the
time at night from the Great Bear.
CLOCKS and TIME / NAWCC
Home Page / NAWCC Chapter Home Pages
Horological Science Chapter Home Page / HSN Index