Courtenay Ilbert Archive

Mercurial Compensation-Pendulum of S. Riefler

Catalogue no: 1523
Dewey No: 681,1124 RIE Subject(s): Courtenay Ilbert Archive
Author(s): S. Riefler
Total pages: 7 Illustrations: 1 Language(s): English Publication date: 1893
Editor: Publisher: Unknown
Dimensions: 240mm x 160mm Condition: Good
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Notes:

Description and illustration of the Riefler mercurial pendulum.

Results of Practical Tests of the Pendulum

Extract from the registered Table of Rates of Riefler's Astronomical Clock N. 1, Royal Observatory, Munich, by H. Seeliger.

Comparison of the constants of compensation of some of the best astronomical Clocks, by S.Riefler

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Pendulum Escapement with perfectly free pendulum, the impulse being communicated in the axis of oscillation and at the moment in which the pendulum swings through the dead point

Catalogue no: 1522
Dewey No: 681.104 RIE Subject(s): Courtenay Ilbert Archive
Author(s): S. Riefler
Total pages: 5 Illustrations: 4 Language(s): English Publication date: 1892
Editor: Publisher: Unknown
Dimensions: 240mm x 160mm Condition: Good
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Notes:

Illustrated description and working details of the Riefler pendulum and escapement

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The Pendulum Accelerometer, an Instrument for the Direct Measurement and Recording of Acceleration

Catalogue no: 1521
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): F.W.Lanchester
Total pages: 9 Illustrations: 7 Language(s): English Publication date: August 1905
Editor: Publisher: Physical Society of London
Dimensions: 220mm x 140mm Condition: Pages a little crumpled, paper cover dirty
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Pages extracted from the Proceedings of the Physical Society of London, vol. XIX. 

From a paper read to the Society, June 16th 1905.

Describes an aspect of pendulum physics not really applicable to horology, but to the testing of locomotive vehicles, "recording the magnitude of the starting and stopping efforts, and generally experimentally determining what may be appropriately termed the 'ballistics of traction'".

Various diagrams of the 1889 and the 1904 models of this machinery.

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Account of experiments made with an invariable pendulum at the Royal Observatory at Greenwich, and at Port Bowen, on the eastern side of Prince Regent's Inlet

Catalogue no: 1520
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): Henry Foster
Total pages: 70 Illustrations: 0 Language(s): English Publication date: 1826
Editor: Publisher: Royal Society
Dimensions: 270mm x 210mm Condition: Good
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An account of experiments to determine the acceleration of the Pendulum in different latitudes
Notes:

Pages extracted from the Philosophical Transactions of the Royal Society journal and bound separately between brown paper covers.

This account is one of several similar experiments around this date to record the performance of a pendulum clock and determine the length of a pendulum vibrating seconds at different latitudes.  Frequent reference is made to others who have worked in this field, eg. Captain Henry Keter ( who assisted with preparations for this experiment), Basil Hall, Sir Thomas Brisbane, Mr Goldingham and Captain Sabine.

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On The Mercurial Compensation Pendulum

Catalogue no: 1519
Dewey No: 681.1124 Subject(s): Courtenay Ilbert Archive
Author(s): Francis Baily, Esq. F.R.S.
Total pages: 38 Illustrations: 0 Language(s): English Publication date: 1824
Editor: Publisher: Astronomical Society of London
Dimensions: 295mm x 235mm Condition: Pages fragile and ragged
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Notes:

Pages extracted from this journal and now bound between light red hard covers.

From a paper read by the Author to the Astronomical Society, May 9 and June 13, 1823.

The first section gives a history of the Mercurial Compensated pendulum from the time of George Graham, with details given on studies into the property of mercury since then.

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Pendulums. An Attempt Towards Obtaining Invariable Measures of Length, Capacity, and Weight, from the Mensuration of Time, Independant of the Mechanical Operations Requisite to Ascertain the Center of Oscillation, or The True Length of Pendulums

Catalogue no: 1518
Dewey No: 681.1124 Subject(s): Courtenay Ilbert Archive
Author(s): John Whitehurst
Total pages: 46 Illustrations: 3 Language(s): English Publication date: 1787
Editor: Publisher: The Author
Dimensions: 260mm x 210mm Condition: Good
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An account of experiments to determine the acceleration of the Pendulum in different latitudes
Notes:

Pamphlet now bound between red hard covers.

The introduction explains the purpose of the experiments with reference to the work of others before the Author.

In the main text, the apparatus designed and used for the experiments is explained and illustrated with three excellent pull-out engravings.

Several charts of results included.

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An Account of M.Bessel's Pendulum Experiments

Catalogue no: 1517
Dewey No: 526.7 Subject(s): Courtenay Ilbert Archive
Author(s): Edward Sabine
Total pages: 27 Illustrations: 0 Language(s): English Publication date: 1829
Editor: Publisher: Quarterly Journal
Dimensions: 235mm x 150mm Condition: Pamphlet fragile but now bound within hard covers
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An account of experiments to determine the acceleration of the Pendulum in different latitudes
Notes:

Pages extracted from this journal and bound separately within orange hard covers.

This account is partly taken from the Author's own examination of Bessel's apparatus and partly from the Transactions of the Berlin Acadamy.

"M.Bessel's memoir may be divided into two general heads: first, the measurement of the seconds pendulum at Konigsberg, by a new method, invented by himself; and, second, dissertaions and experiments on points connected with pendulum experiments generally."

Notes and annotations in ink made to the text, possibly by the Author.

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An account of experiments to determine the acceleration of the Pendulum in different latitudes

Catalogue no: 1516
Dewey No: 681.1124 Subject(s): Courtenay Ilbert Archive
Author(s): Edward Sabine
Total pages: 27 Illustrations: 0 Language(s): English Publication date: 1821
Editor: Publisher: Royal Society
Dimensions: 270mm x 210mm Condition: Good
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Observations for ascertaining the length of the Pendulum at Madras in the East Indies,... with the conclusions drawn from the same.
Notes:

A full account of the experiments using two clocks by Shelton, the same clocks used on Captain Cook's circumnavigation of the globe.

Clocks were set up in four different locations;

London 

Brassa (Shetland Islands)

Hare Island (Greenland)

Melville Island ("in the Polar Sea")

Thus the clocks were tested between latitudes 51.31 and 74.47 and the length of a pendulum vibrating seconds in each was recorded.

Two chronometers were also used in these tests; Arnold No.112 and Parkinson & Frodsham No. 259.

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On the reduction to a vacuum of Captain Kater's convertable pendulum.

Catalogue no: 1515
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): Edward Sabine
Total pages: 7 Illustrations: 0 Language(s): English Publication date: 1829
Editor: Publisher: Royal Society
Dimensions: 270mm x 210mm Condition: Reasonable
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The Resistance of the Air, determined from Captain Kater's Experiments on the Pendulum
Notes:

Pages extracted from this journal and bound separately between brown paper covers.

Paper gives details of experiments with a precision pendulum, on a clock by Dent.  Its performance is noted and conclusions drawn when in air of ordinary density and in highly rarefied air. 

Experiments took place April 21 - April 23, 1829.  Barometric pressure on these day noted.

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An Account of the Influence which Two Pendulum Clocks Were observed to have upon each other

Catalogue no: 1514
Dewey No: 681.1124 ELL Subject(s): Courtenay Ilbert Archive
Author(s): John Ellicott
Total pages: 10 Illustrations: 0 Language(s): English Publication date: 1739
Editor: Publisher: Royal Society
Dimensions: 210mm x 270mm Condition: Reasonable
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Notes:

An account of an experiment with two pendulum controlled regulator timepieces by this eminent horologist.

Describes the two timepieces made to the highest standard (pendulum bobs 23 lbs, driving weights 3lbs), set up at right angles to each other, with pendulum bobs being two feet apart when at rest.  Behavior, rates, and stopping patterns of the clocks described.

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