Experiments, and observations on the Malvern waters.

  • John Wall
Date:
[1757]
Catalogue details

Licence: Public Domain Mark

Credit: Experiments, and observations on the Malvern waters. Source: Wellcome Collection.

    34/80 (page 32)
    • (32-1 the Orifice .with my Finger, gave: it one brifk fhake; innumerable very finall Bubbles were inftantly dilperl- ed through the whole Water, which continued to arife from the bottom of the Vellel lor fome little Time. When the Water was fhaken in the like manner, without the Addition of an Alcali, feveral minute Air Bubbles were form’d upon the firft Motion ; but thefe foon went off, and none rofe from the Bottom as in the former Cafe. To the pure Water which had been thus agitated, I then pour’d a few Drops of the Alcali, and fhook as belore ; but no fuch Ebullition fucceeded as in the firft Experiment : So foon was the Acid diftipated. How necefiary is it therefore to drink the Water at the Spring Head, in order to have it in full Force ! Thefe Experi¬ ments were feveral Times repeated, in the Prefence of fome very inge¬ nious