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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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.

Information given on the construction of such pendulums and quantities of mercury required.  Many references made to the work of others in this field.  (Reference also made to a Plate to illustrate a Mecurial pendulum but this is regretably missing).

Final three pages consist of charts giving details of "Linear Expansion of Various Substances for one degree of Fahrenheit's Thermometer."  Substances listed as follows;

White Deal, Glass, Platina, Iron, Steel, Gold, Copper, Brass, Silver, Pewter, Tin, Lead, Zinc. 

Room location: Library Cabinet: E Shelf: 2
Search terms: Pendulums, Precision Timekeeping
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