. Experiments with plants. Botany. grains. Fig. 162 shows the appearance of these in the Oat. Placed in a drop of water on a slide, covered with a cover-glass and examined under the high power of the microscope, many of the pollen-grains are seen to be sending out long tubes (Fig. 163) which grow down along the brush-like style to- ward the ovary. What happens after that can be seen only OvaryTseed-case) o£ !» g^od SCCtioUS, but Oat with feathery style. jj^^y jjg dcSCribcd lu a few words. Inside the ovary lies (as you may see with a hand-lens) a tiny seed or ovule (Fig. 161). "Within th
. Experiments with plants. Botany. grains. Fig. 162 shows the appearance of these in the Oat. Placed in a drop of water on a slide, covered with a cover-glass and examined under the high power of the microscope, many of the pollen-grains are seen to be sending out long tubes (Fig. 163) which grow down along the brush-like style to- ward the ovary. What happens after that can be seen only OvaryTseed-case) o£ !» g^od SCCtioUS, but Oat with feathery style. jj^^y jjg dcSCribcd lu a few words. Inside the ovary lies (as you may see with a hand-lens) a tiny seed or ovule (Fig. 161). "Within this is a mass of tissue, in the central cavity (embryo sac. Fig. 164) of which lies the egg. In the center of the Qgg is a nucleus. The pollen-tube approaches to within a short distance of the egg and opens at the end; a nucleus issues from it which unites with the nucleus of the egg, so that the two form a single nucleus. The egg then begins to develop and eventually forms a tiny plant, with '"'â sty^iTof °o *' ,. , J , , r. n ⢠showing a pol- caulicle and leaves, such as we nnd in len-grainpushing out a long lube the ripened seed. which""*ro''ws Unless the union of the nuclei takes o^^ue'^lli,!. 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 Osterhout, Winthrop John Van Leuven, 1871-. New York, The Macmillan company; London, Macmillan & co. , ltd.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisher, booksubjectbotany
