Volume 1

Experiments upon vegetables, discovering their great power of purifying the common air in the sun-shine, and of injuring it ... at night. To which is joined, a new method of examining the ... salubrity of the atmosphere / [Jan Ingenhousz].

  • Jan Ingenhousz
Date:
1779
Catalogue details

Licence: Public Domain Mark

Credit: Experiments upon vegetables, discovering their great power of purifying the common air in the sun-shine, and of injuring it ... at night. To which is joined, a new method of examining the ... salubrity of the atmosphere / [Jan Ingenhousz]. Source: Wellcome Collection.

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    E *s3 ] \ A glafs tube longer than that which I had at hand would bear a larger fcale, and thus indicate with ftill more accuracy the good* nefs of the air : but the two mea- fures of air let up muft not fill more than one half of the glafs tube, for otherwife it could not be fhook in the water without danger of fome bubbles of air coming out of it, or rufhing in it, by the force of fhaking it up and down. In the works of the Rev. Dr. Prieftley, one meafure of common air is faid to occupy fometimes 1 20, and even more fubdivifions, which is owing to his peculiar method. He fir ft joins the two airs together in a feparate jar, and allows them to ftand a certain time to incorpo¬ rate one with the other; after which, he lets them up in his large tube