Mercury pendulum

Autor:

Augustin-Privat Deschanel

Shortlink:

https://czwiki.cz/b/db69f

Zdroj:

Wikimedia Commons

Formát:

280 x 847 Pixel (12732 Bytes)

Popis:

Drawing of a mercury pendulum used in precision regulator clocks, from a French physics book from 1878. The two glass flasks are filled with mercury which expands with an increase in temperature, compensating for the increase in length of the pendulum due to thermal expansion of the rod, keeping the period of swing constant. About 10 inches (25 cm) long, this type was used in a style of mantle clock called a 'crystal regulator'. Alterations to image: Removed caption, rotated to compensate for scanning error, converted from JPG to PNG.

Komentář k Licence:

Public Domain - Deschanel died in 1881, Everett in 1904

Licence:

Public domain

Credit:

Downloaded December 28, 2008 from Augustin Privat Deschanel, Joseph David Everett (1878) Elementary Treatise on Natural Philosophy, D. Appleton & Co., New York, p.272, fig.207, translated from Privat Deschanel's Traité Élémentaire de Physique by Joseph David Everett on Google Books

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