A Course of Practical Instruction in Botany volume 1
A Course of Practical Instruction in Botany volume 1
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In our eReader you can find the full English version of the book. Read A Course of Practical Instruction in Botany volume 1 Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Course of Practical Instruction in Botany volume 1
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Many cells have recently divided (this is necessary to keep pace with the growth in thickness of the vascular cylinder). Large intercellular spaces (Resin-passages) occur here and there, and are lined with small-celled epithelium.
It must be remembered that in the present case the resin itself has been dissolved out by alcohol. Sections should, there- fore, be made from fresh material in order to see the secretion in situ. It appears amorphous and transparent ; it is soluble in alcohol, leaving... a slight residue. N. B. All resins are not so easily soluble.
The secretion stains deeply with tincture of alkanet.
Near the periphery of the cortex will be found a- layer of Cork and a Cork-cambium (cf. Stem of Elm p. 70), derived from cells of the cortex by their division by tangential walls. The cells of the cork have no cell-contents ; their walls are coloured yellowish brown with Schulze's solution.
Treat a section with strong sulphuric acid. The walls of the cork retain their sharp contour.
What to read after A Course of Practical Instruction in Botany volume 1?
You can find similar books in the "Read Also" column, or choose other free books by F O Frederick Orpen Bower to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Many cells have recently divided (this is necessary to keep pace with the growth in thickness of the vascular cylinder). Large intercellular spaces (Resin-passages) occur here and there, and are lined with small-celled epithelium.
It must be remembered that in the present case the resin itself has been dissolved out by alcohol. Sections should, there- fore, be made from fresh material in order to see the secretion in situ. It appears amorphous and transparent ; it is soluble in alcohol, leaving... a slight residue. N. B. All resins are not so easily soluble.
The secretion stains deeply with tincture of alkanet.
Near the periphery of the cortex will be found a- layer of Cork and a Cork-cambium (cf. Stem of Elm p. 70), derived from cells of the cortex by their division by tangential walls. The cells of the cork have no cell-contents ; their walls are coloured yellowish brown with Schulze's solution.
Treat a section with strong sulphuric acid. The walls of the cork retain their sharp contour.
What to read after A Course of Practical Instruction in Botany volume 1?
You can find similar books in the "Read Also" column, or choose other free books by F O Frederick Orpen Bower to read onlineMoreLess
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