. Elements of geology. Geology. a. Sphenopteris crenata. b. The same, magnified. (Foss. Flo. 101.) Fig. Sigillaria Imvigaia, 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 Lyell, Charles, Sir, 1797-1875; Gibbes, Lewis Reeve, 1810-1894, former owner. DSI; Merrill, George P. (George Perkins), 1854-1929, former owner. DSI. Philadelphia : James Kay, Jun. and Brother ; Pittsburgh : C. H. Kay & Co.

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Keywords: ., bookauthorlyellcharlessir17, bookcentury1800, booksubjectgeology