The Microscope Its History Construction And Application Being a Familiar in
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Hicks's observations lead to the conclusion that the gonidia of Lichens have greater powers in this direction than has been generally supposed. He found by placing a clean sheet of glass in the open air during a fall of snow, and receiving the melting water in a tube or bottle, that he obtained large quantities of what has been looked ujDon as a " unicellular plant, commonly called * Chlorococcus, ' the cells of which may remain in a dor- mant condition for a long time during cold weather, but ...upon the return of warmth and moisture they begin to increase by a process of subdivision, into two, four, or eight portions, which soon assume a rounded form and burst the parent cell- wall open ; these secondary cells LICHENS. 307 soon begin to divide and subdivide again, and this process may go on without much variation even for years. The phenomena described may also be watched by taking a portion of the bark of a tree on which the Chlo7'ococcus has been deposited, and placing it under a glass to keep it in a moderately moist atmosphere ; the only difference being a change in colour, which is caused by the growth of the fibres, as may be seen on microscopical examination.
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You can find similar books in the "Read Also" column, or choose other free books by Hogg, Jabez, 1817-1899 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Hicks's observations lead to the conclusion that the gonidia of Lichens have greater powers in this direction than has been generally supposed. He found by placing a clean sheet of glass in the open air during a fall of snow, and receiving the melting water in a tube or bottle, that he obtained large quantities of what has been looked ujDon as a " unicellular plant, commonly called * Chlorococcus, ' the cells of which may remain in a dor- mant condition for a long time during cold weather, but ...upon the return of warmth and moisture they begin to increase by a process of subdivision, into two, four, or eight portions, which soon assume a rounded form and burst the parent cell- wall open ; these secondary cells LICHENS. 307 soon begin to divide and subdivide again, and this process may go on without much variation even for years. The phenomena described may also be watched by taking a portion of the bark of a tree on which the Chlo7'ococcus has been deposited, and placing it under a glass to keep it in a moderately moist atmosphere ; the only difference being a change in colour, which is caused by the growth of the fibres, as may be seen on microscopical examination.
What to read after The Microscope Its History Construction And Application Being a Familiar in?
You can find similar books in the "Read Also" column, or choose other free books by Hogg, Jabez, 1817-1899 to read onlineMoreLess
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