. Essentials of botany. Botany; Botany. 46 ESSENTIALS OF BOTANY Chip away part of the shell from the larger end of the egg, place it in a wide-mouthed bottle or a small beaker full of water, as shown in Fig. 21, then very cautiously pierce a hole through the upper end of the eggshell by pushing a knitting-needle or ___L •wire down through the glass tube. --f***"*"^^^*^ Watch the apparatus for some hours and note ,^^ ^,—J any change in the contents of the tube. Explain. ^ / The rise of liquid in the tube is evidently due to water making its way through the thin mem- brane which li
. Essentials of botany. Botany; Botany. 46 ESSENTIALS OF BOTANY Chip away part of the shell from the larger end of the egg, place it in a wide-mouthed bottle or a small beaker full of water, as shown in Fig. 21, then very cautiously pierce a hole through the upper end of the eggshell by pushing a knitting-needle or ___L •wire down through the glass tube. --f***"*"^^^*^ Watch the apparatus for some hours and note ,^^ ^,—J any change in the contents of the tube. Explain. ^ / The rise of liquid in the tube is evidently due to water making its way through the thin mem- brane which lines the eggshell, although this mem- brane contains no pores visible even under the Fig. 21. Egg on Beaker of Water, to show Osmosis. Fig. 22. A, a very young root-hair; B, a much older one (both greatly magnified), e, cells of the epi- dermis of the root; n, nucleus; •s, watery cell-sap; p, thicker protoplasm lining the cell-wall. 60. Osmosis in Root-Hairs The soil-water (practically identical with ordinary spring or well water) is separated from the more or less sugary or mucilaginous sap inside of the rootrhairs only by their delicate cell-walls lined. 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 Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn
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