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

2 - 7 Four-Gear Grandfather Clock by Hubert Houtman

8 - 13 Le Bon's Equation Puzzle by Graham White

14 - 19 Two-year performance of Evan Edwards' All-Mechanical Wall Regulator Clock with Cross-Flex Suspension and Carbon Fiber Pendulum Rod by Evan Edwards

20 - 23 Marcel Bétrisey's Radiometric Pendulum Clock by Bob Holmström

24 Corrections to Extensions to the Smith Method of Amplitude Measurement by Bob Holmström

24 Electric clock animation software available on CD

There are no 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.

The deadline for material for the next issue is September 15th.

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.

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