HSN Entry

HOROLOGICAL SCIENCE NEWSLETTER - NAWCC CHAPTER #161
Issue 2020-4 September 2020

1Correction to “The Tangent Rule in Practice” by Pepi Cima
2 - 11Just How Good was Fedchenko’s Clock? by Duncan Agnew
12 - 29Recoil Escapement Modelling by State-Transition by J.B. Edwards
30 - 31Postscript by J.B. Edwards
32Bob Mathys – Obituary by Tracy Christenson

HOROLOGICAL SCIENCE NEWSLETTER - NAWCC CHAPTER #161
Issue 2020-3 July 2020

PagesContents
2 - 13Contact microphone devices for mechanical watches by S. R. Thackery
14 - 28Continued Examination of the Tangent Rule and its Development for Rectangular Escapement Pulses by John Edwards
29 - 30Comments on JB Edwards paper on mathematical modelling by Douglas Bateman
31An Unusual Pendulum and a Plea for Help by Price Russ
32Harrison Decoded by Bob Holmström + note from John Edwards

HOROLOGICAL SCIENCE NEWSLETTER - NAWCC CHAPTER #161
Issue 2020-2 May 2020

PagesContents
2 - 20Nonlinearity as an essential component in the Modelling of the Assisted Pendulum by J. B. Edwards
21 - 24The Tangent Rule in Practice by Pepi Cima

HOROLOGICAL SCIENCE NEWSLETTER - NAWCC CHAPTER #161
Issue 2020-1 February 2020

PagesContents
2 - 7Further Historical Performance of Precision Pendulum Clocks by M. K. Hobden
8 - 21Verge & Foliot Escapement Experiments by Bob Holmström
22 - 24An Electrical Engineer Looks at a Watch – Brief Notes on a Lecture by Prof. Gerald Sussman by David MacMillan

HOROLOGICAL SCIENCE NEWSLETTER - NAWCC CHAPTER #161
Issue 2019-5 December 2019

PagesContents
2 - 9A Note on Precision Pendulum Clocks and Allan Deviation by M. K. Hobden
10 - 32State-Transition Models for Simulating Nonlinear Horological and Related Systems: Two Case Studies by J. B. Edwards

HOROLOGICAL SCIENCE NEWSLETTER - NAWCC CHAPTER #161
Issue 2019-4 October 2019

PagesContents
2 - 12Graham White’s Epicyclic Trilogy Introduction
13 - 25Electrically Reset Gravity Escapement Clock by Ian Richardson
26 - 32A Polish Precision Clock by Bob Holmström

HOROLOGICAL SCIENCE NEWSLETTER - NAWCC CHAPTER #161
Issue 2019-2 & 3 August 2019

PagesContents
2Foreword to three papers on ‘A Role for the Computer in Horological Science’ J. B. Edwards
3 - 24#1 - A Role for the Computer in Horological Science? A Case Study in Escapement Theory by J. B Edwards
25 - 42#2 - A Role for the Computer in Horological Science? A Case Study in Escapement Theory: Amplitude Considerations by J. B. Edwards
43 - 53#3 - A Role for the Computer in Horological Science? A Digest of a Case Study in Escapement Theory by J.B. Edwards
54 - 55Appendix 1: State- & Driving- Transition Matrix Elements by J. B. Edwards
46 - 58Appendix 2: Improved Euler Approximation for State-Transition Coefficient determination by J.B. Edwards

HOROLOGICAL SCIENCE NEWSLETTER - NAWCC CHAPTER #161
Issue 2019-1 May 2019

PagesContents
2The state of HSN by Bob Holmström
3 - 6A visit to Father O’Leary’s Clock by Bob Holmström
7 - 27Father O’Leary’s Free Pendulum Revised Set Up Instructions by Pierre Boucheron 1991 & 1994
28 - 32Multi-variant Regression Analysis of Horological Data using R by Bob Holmström

HOROLOGICAL SCIENCE NEWSLETTER - NAWCC CHAPTER #161
Issue 2018-5 December 2018

PagesContents
2 - 10Another Look at the SH41 Data by Duncan Carr Agnew
11 - 13Masters, Servants, Countwheels, and a new Artificial Clockmaker by Duncan Carr Agnew
14 - 27A Pendulum Powered by The Earth’s Centrifugal Force Part I: Theory by C. Stuart Kelley
28Please note that subscriptions for 2019 are now due by David Spong

HOROLOGICAL SCIENCE NEWSLETTER - NAWCC CHAPTER #161
Issue 2018-4 September 2018

PagesContents
2 - 10Clock Hydrodynamics–Part II: Determination of the model constants and comments on Clock B by Douglas S. Drumheller
11 - 12Clock XI0 by Douglas S. Drumheller
13 - 26Pendulum and sensor experiments – A work in progress by Bob Holmström
28Please note that subscriptions for 2019 are now due by David Spong

HOROLOGICAL SCIENCE NEWSLETTER - NAWCC CHAPTER #161
Issue 2018-3 July 2018

PagesContents
2 - 12Clock Hydrodynamics–Part I: My Two Clocks & John Harrison’s Tin Whistle by Douglas S. Drumheller
13 - 18On Compound Pendulums Suspended From Circular Chops by John Haine and Andrew Millington
19 - 21Involute gearing by Henry Casson
22Comments from the editor

HOROLOGICAL SCIENCE NEWSLETTER - NAWCC CHAPTER #161
Issue 2018-2 April 2018

PagesContents
2 - 43Theory of the Verge & Foliot Clock of the Early Medieval Age By Dieter Roess
44Dieter Roess Biography

HOROLOGICAL SCIENCE NEWSLETTER - NAWCC CHAPTER #161
Issue 2018-1 March 2018

PagesContents
2 - 5Mathematics of a Coaxial Watch Escapement, An Introduction for Horological Science Newsletter by Dr. Eng. Gianni Petrangeli
6 - 8Philip Woodward Obituary
9Graham White Obituary
10 - 11Graham White book project
12New books Betts - Marine Chronometers - Frumer - Making Time