. The great world's farm; some account of nature's crops and how they are grown. Natural history. t68 Leaves and their Work rells of a honeycomb, except that they vary extremely in size and shape. Some cells are so minute as to be altogether invisible to the naked eye; as, for instance, the spores of lichens and fijngi, the ' germs ' already mentioned, and certain minute water plants, each and all of which consist of a single cell, filled, like the honey-cells, with more or less fluid contents. But the cells in the flesh of a lemon are gigantic by comparison, being half an inch long; the cells
. The great world's farm; some account of nature's crops and how they are grown. Natural history. t68 Leaves and their Work rells of a honeycomb, except that they vary extremely in size and shape. Some cells are so minute as to be altogether invisible to the naked eye; as, for instance, the spores of lichens and fijngi, the ' germs ' already mentioned, and certain minute water plants, each and all of which consist of a single cell, filled, like the honey-cells, with more or less fluid contents. But the cells in the flesh of a lemon are gigantic by comparison, being half an inch long; the cells of ^QQ^QBoaQQS^.. Transverse section of a leaf, magnified. fibres are often much longer than this, and there are cells of all sizes between these, the most usual size being from -yt^js to ^^ of an inch across. Cells are of almost every possible shape, too—globular, square, six-sided, twelve-sided, or quite irregular, with their outlines beautifully zigzagged or waved. But, whatever their shape and size, their walls, thick or thin, are composed of the skeleton material mentioned above, which is called after them ' cellulose.' This material, like cotton and other fibres, is com- posed in great measure of carbon, and, as all plants in-. 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 Gaye, Selina. New York [etc. ] The Macmillan company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
