. The pictorial sketch-book of Pennsylvania, or, Its scenery, internal improvements, resources, and agriculture, populary described . FIG. 14.—LEPIDODIA. FIG. 15.—CRASSULA TETRAGONA. which, in these plants, is conveyed in myriads of small cuticularpores, to the cellular tissue which lies beneath them. The Calamites are not analogous to any existing species, as alreadynoted, they resemble some plants in structure, but differwidely in their proportions—the fossil indicating large trees, whilethe existing species which they resemble are but two or three feethigh, and of corresponding diam
. The pictorial sketch-book of Pennsylvania, or, Its scenery, internal improvements, resources, and agriculture, populary described . FIG. 14.—LEPIDODIA. FIG. 15.—CRASSULA TETRAGONA. which, in these plants, is conveyed in myriads of small cuticularpores, to the cellular tissue which lies beneath them. The Calamites are not analogous to any existing species, as alreadynoted, they resemble some plants in structure, but differwidely in their proportions—the fossil indicating large trees, whilethe existing species which they resemble are but two or three feethigh, and of corresponding diameter. Of the coniferjB of the coal, it has been observed that they bear astrong resemblance to existing pines—slices of the wood, when examinedby the microscope, showing that theducts or glands peculiar to thisfamily of trees, are arranged in asimilar manner, that is, altornatel} in double and triple rows, fig. 16. The stigmaria is generally sup-posed to have been a large succulent water-plant—the stem, in itscompressed fossil state, varying from two to six inches in diameter,and has numerous processes, which proceed
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Keywords: ., bookcentury1800, bookdecade, booksubjectminesandmineralresources
