. The life of the plant. Plant physiology. THE CELL 51 the coloured liquid in the beaker. I lift up the bell now ; the conditions are altogether reversed ; hydrogen is now inside the vessel, air outside it ; hydrogen moves towards the outside, air passes in ; but particles of hydrogen move more quickly than those of air, so the volume inside the apparatus decreases, and you notice the red liquid rising quickly in the glass tube (b). Therefore gases, even more than liquids, are capable of diffusion, are capable of permeating all spaces as yet unoccupied by them. The hydrogen rushed into. F
. The life of the plant. Plant physiology. THE CELL 51 the coloured liquid in the beaker. I lift up the bell now ; the conditions are altogether reversed ; hydrogen is now inside the vessel, air outside it ; hydrogen moves towards the outside, air passes in ; but particles of hydrogen move more quickly than those of air, so the volume inside the apparatus decreases, and you notice the red liquid rising quickly in the glass tube (b). Therefore gases, even more than liquids, are capable of diffusion, are capable of permeating all spaces as yet unoccupied by them. The hydrogen rushed into. Fig. 18. the vessel only because the latter contained no hydrogen, and later rushed out of the vessel only because none was present in the air of this hall. Likewise all gaseous matter and also matter dissolved in liquids tends to occupy the whole space accessible to it, and to spread uniformly through it. Now let us see in what relation the phenomena of the diffusion of gases and liquids stand to our question concerning the nutrition of the cell. Here is an appar- atus reminding us pretty closely of a cell (fig. 18). It is a thin bladder moistened with water and transparent as glass, made out of a substance like cellulose or rather actually made of cellulose itself, only a little. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Timiri?a?zev, K. A. (Kliment Arkad?evich), 1843-1920; Sheremeteva, Anna, tr. London, New York, Bombay, Calcutta, Longmans, Green, and Co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplantph, bookyear1912
