Description of a Tubular Pendulum having All the Properties of the Gridiron but Being more compact as well as more steady in its Motions.

Catalogue no: 1497
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): Edward Troughton
Total pages: 7 Illustrations: 1 Language(s): English Publication date: 1804
Editor: Publisher: Philosophical Journal?
Dimensions: 210mm x 130mm Condition: Reasonable
Related titles: Related library records:

A separately published offprint, in the form of a letter to Mr Nicholson, Author of the Philosophical Journal, originally published in that journal in December, 1804.

Although firstly a maker of telescopes and other astronomical instruments, the author describes how he has been making pendulums for twenty years, "...and I own the subject is still agreeable to me, being yet unencumbered with patents, the reason of which no doubt is, that the few wanted hold out no prospect of gain."

He describes his pendulum as "...of the gridiron kind, although extremely unlike it in outward appearance, is only a new species of that genus."

The pendulum as described and illustrated has the appearance of a brass rod but with steel rods of smaller diameter inserted within the brass rod.

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