An inquiry into the changes induced on atmospheric air by the germination of seeds, the vegetation of plants, and the respiration of animals / [Daniel Ellis].

  • Ellis, Daniel
Date:
1807
Catalogue details

Licence: Public Domain Mark

Credit: An inquiry into the changes induced on atmospheric air by the germination of seeds, the vegetation of plants, and the respiration of animals / [Daniel Ellis]. Source: Wellcome Collection.

    280/656 page 6
    e rmination, either in the sunshine or in the shade; bed that seeds grew beth in common air and in oxyge | gas, and formed carbonic acd in each *. Thess sequent experiments of Gough, Cruickshank, Saussure; and those which have been already re! ' (& et seq.) confirm, in all respects, the conclusien: of Scheele. In his late Researches, also, De ‘ | sure extended his experiments to a great variety af] seeds, and, in all that he tried, he found the bulk at carbonic acid produced to be exactly equal to that of the oxygen gas which had disappeared }. These va-/ rious experiments seem to establish, beyond the reach of doubt, the facts, that oxygen gas is essential] to germination; that it is converted inte carbonic | acid in that process; and that the bulk of acid gas produced is exactly equal to that of the oxygen gas: which disappears. see ci et 209. In the former part of our inquiry (22.) we | stated the bulk of carbonic acid, formed in germinas | tion, to be somewhat less than that of the oxygen consumed, which we ascribed to the condemsetien, | supposed, at that time, to attend the conversiomaf | oxygen gas into carbonic acd. We then, however | mentioned many difficulties which opposed the aces | rate determination of this point; and our opinion at | the time, waS at warance with the ? | Scheele, of Crmekshank, and of De Saussure. have since found, in many trials, that no apparent | PRES yen germina. | - 2 * Expenences sar les Vezetamx, tom. ii. p. 2. 10. + Recherebes Chim. p. OQ. 10.
    digitised image 1
    digitised image 2
    digitised image 3