Letter | Published:

An Early Mercury Pump

Nature volume 70, pages 223224 (07 July 1904) | Download Citation

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Abstract

IT may interest some of your readers to know that as early as 1820 an air pump was described depending on the formation of a Torricellian vacuum, and therefore on the same principle as Geissler's and its successors. The paper is by M. Fafchamps—“Description d'une machine pneumatique à l'aide de laquelle on opère le vide sans le secours de la pompe” (Annales générales des Sciences physiques, Bruxelles, vol. vi., 1820, pp. 101–2).

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  1. July 1.

    • HERBERT MCLEOD

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DOI

https://doi.org/10.1038/070223b0

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