Philosophical Transactions of the Royal Society

Improved Pendulum

Catalogue no: 1511
Dewey No: 681.1124 Subject(s): Courtenay Ilbert Archive
Author(s): David Ritchie
Total pages: 7 Illustrations: 1 Language(s): English Publication date: 1818
Editor: Publisher: Philosophical Transactions of the Royal Society
Dimensions: 210mm x 130mm Condition: Reasonable
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Notes:

Pages extracted from this journal and bound separately between card covers.

"The Gold Isis Medal and Thirty Guineas were this Session voted to Mr. D. Ritchie, of Clerkenwell, for an Improved Method Of Giving Motion To A Pendulum."

Main article is in the form of a letter from Ritchie of Northampton-street, Clerkenwell, written Feb. 15, 1818.

Room location: Library Extension Cabinet: F Shelf: 5
Search terms: Pendulums, Precision Timekeeping
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Compensation Pendulum for a Clock

Catalogue no: 1510
Dewey No: 681.1124 Subject(s): Courtenay Ilbert Archive
Author(s): Adam Reid
Total pages: 5 Illustrations: 3 Language(s): English Publication date: 1810
Editor: Publisher: Philosophical Transactions of the Royal Society
Dimensions: 225mm x 140mm Condition: Fragile, pages loose
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Notes:

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

"Fifteen Guineas were this session voted to Mr Adam Reid, of Green's End, Woolwich, for a Compensation Pendulum for a Clock."

Description of a zinc and iron half seconds pendulum, accompanied by an engraving of the features.

Also included in these pages, a description of Mr. Spark's Noctuary, "for ascertaining the hour at night, by an apparatus connected with a common watch".  Illustrated on the same page as the pendulum.  The Silver medal was awarded.

Room location: Library Extension Cabinet: F Shelf: 5
Search terms: Horological Tools, Nocturnals, Pendulums, Precision Timekeeping, Temperature Compensation
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Inventor of the Contrivance in the Pendulum of a Clock, to prevent the Irregularities of its Motion by Heat and Cold

Catalogue no: 1509
Dewey No: 681.1124 Subject(s): Courtenay Ilbert Archive
Author(s): James Short F.R.S.
Total pages: 7 Illustrations: 0 Language(s): English Publication date: 1752
Editor: Publisher: Philosophical Transactions of the Royal Society
Dimensions: 230mm x 180mm Condition: Reasonable
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Notes:

Pages taken from Royal Society magazine and bound separately between marbled paper.

Short's lecture on the compensated pendulum, "... and it having been often asked, who was the inventor of it, I have therefore thought proper to draw up the following historical account of it: And as this account contains nothing but matters of fact, supported by the best authorities, I hope it will be acceptable to this Society, ..."

Room location: Library Extension Cabinet: F Shelf: 5
Search terms: Pendulums, Temperature Compensation
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Treatises On The Pendulum

Catalogue no: 1508
Dewey No: 531.53 Subject(s): Courtenay Ilbert Archive
Author(s): Multiple
Total pages: 516 Illustrations: 1 Language(s): English Publication date: 1818-1832
Editor: Publisher: Philosophical Transactions of the Royal Society
Dimensions: 290mm x 225mm Condition: Reasonable, but hard covers separated at spine
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Notes:

Bound copy (grey/brown hard covers) of several articles on this subject read to the Royal Society 1818-1832.  Previously owned by Robert Gardner, Chronometer Maker, whose name is inscribed in ink inside front cover.

Details of articles as follows:

1. Remarks on the probabilities of error in physical observations, and on the density of the earth, considered, especially with regard to the reduction of experiments on the pendulum.  In a letter to Capt. Henry Kater, F.R.S.  By Thomas Young, M.D. For Sec. R.S.  Read January 21, 1819.  (24 pages)

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Account of Pendulum Experiments undertaken in the Harton Colliery, for the purpose of determining the Mean Density of the Earth

Catalogue no: 1506
Dewey No: 531.53 Subject(s): Courtenay Ilbert Archive
Author(s): George Biddell Airy
Total pages: 58 Illustrations: 2 Language(s): English Publication date: 1856
Editor: Publisher: Philosophical Transactions of the Royal Society
Dimensions: 300mm x 235mm Condition: Reasonable,
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Lecture on the Pendulum-Experiments at Harton Pit
Notes:

A lecture read January 24 and 31, 1856.

An experiment to determine the mean density of the earth carried out 1854-5. 

Begins with a history of the theory behind the experiment and its progress since 1826.

A full account of the experiment together with several charts of the clock's performance.

Two engravings at rear show a map of the Colliery area and another of the two clocks and other equipment used in the experiment.

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Observations for proving the Going of Mr Elliott's Clock at St. Helena

Catalogue no: 1489
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): Charles Mason
Total pages: 9 Illustrations: 0 Language(s): English Publication date: 1762
Editor: Publisher: Philosophical Transactions of the Royal Society
Dimensions: 220mm x 175mm Condition: Good
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Notes:

A report of the lecture given to the Society by Charles Mason on May 6th, 1762.

Concerns the clock taken to the Cape of Good Hope for observations and which was set up on St Helena on the journey back to Britain.  The Rev, Mr Maskelyne assisted with the observations.

Five pages of charts follow detailing the performance of the clock.

There follows "An Account of Mr Mason's Paper, concerning the Going of Mr Elliott's Clock, at St Helena: by James Short," read to the Society on May 13th, 1762.

Room location: Library Extension Cabinet: F Shelf: 5
Search terms: Precision Timekeeping
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