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].

  • Ingenhousz, Jan, 1730-1799
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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    [ 80 ] 4 | ,> ^ « ■ < ; _ * «• f ; * the plants will be earlier revived in. their office than when the fun is hid by thick clouds. I found this difference to be very remarkable, fo that in a dark cloudy morning I found the plants to begin their daily operation an hour or two later than in a clearer day. I even found that all the plants in the farhe gar¬ den did not awake, if 1 may lb exprefs myfelf, at the fame time from their nocturnal ftupor. Thofe plants, whofe expofure was fuch as favoured the rays of the fun being call early upon them, were re¬ vived earlier than thofe which were lhadfed by other plants, a wall, a houfe, See. Nay, I even found that there was fome difference in this refpedt between the leaves of the fame tree; as I found thofe which were the firft influenced by