. Fossil plants : for students of botany and geology . Paleobotany. 316 CALAMITES. [CH. of the pith-cast, and that such external features are connected â with the arrangement of the tissues in the vascular cylinder. The indication of grooves and ridges on the bark of fossil Ca- lamites is no doubt the result of the existence in the hypoderm. NJ2. Fig. 77. Portion of a Calamite stem, showing the surface of the bark, c; the wood, 6; the surface of the pith-oast, a. â Nodes. -R. Boot. (After Grand'Eury. Partially restored from a specimen in the Ecole des Mines, Paris.) | nat. siz
. Fossil plants : for students of botany and geology . Paleobotany. 316 CALAMITES. [CH. of the pith-cast, and that such external features are connected â with the arrangement of the tissues in the vascular cylinder. The indication of grooves and ridges on the bark of fossil Ca- lamites is no doubt the result of the existence in the hypoderm. NJ2. Fig. 77. Portion of a Calamite stem, showing the surface of the bark, c; the wood, 6; the surface of the pith-oast, a. â Nodes. -R. Boot. (After Grand'Eury. Partially restored from a specimen in the Ecole des Mines, Paris.) | nat. size. of firm strands alternating with strands of less resistant cells. It is very common to find Calamite pith-casts covered with a layer of coal presenting a ribbed surface, but this is simply due to the moulding of the coaly film on an internal 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 Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishercambr, bookyear1898
