. Foundations of Botany. Botany. ROOTS 51 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. 24, then very cautiously pierce a hole through the upper end of the eggshell by pushing a knitting-needle or wire down through the glass tube. AVatch the apparatus for some hours and note any change in the contents of the Explain. The rise of liquid in the tube is evidently due to water making- its way through the thin membrane which lines the eggshell, although this membrane contains no pores visible ev
. Foundations of Botany. Botany. ROOTS 51 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. 24, then very cautiously pierce a hole through the upper end of the eggshell by pushing a knitting-needle or wire down through the glass tube. AVatch the apparatus for some hours and note any change in the contents of the Explain. The rise of liquid in the tube is evidently due to water making- its way through the thin membrane which lines the eggshell, although this membrane contains no pores visible even under the microscope. EXPERIMENT XVI Result of placing Sugar on a Begonia Leaf. — Place a little pow- dered sugar on the upper surface of a thick begonia leaf under a small bell-glass. Put another por-~ tion of sugar or a bit of paper alongside the leaf. Watch for several days. Explain results. The upper surface of this leaf contains no pores, even of microscopic size. 63. Inequality of Os- motic Exchange. — The nature of the two liquids separated by any given membrane determines in which direction the greater flow shall take place. If one of the liquids is Fig. 24. — Egg on Beaker of Water, pure water and the other to show 1 Testing the contents of the "beaker with nitrate of silver solution will then show the presence of more common salt than is found in ordinary water. 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 & company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1901
