Manuscript entitled, Fossil Flora and Fauna of the Pennsylvanian Period, Will County, Illinois
by George Langford (1876-1964)
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Calamites cruciatus and Calamites approximatus, page 19.

		Calamites undulatus, GL photograph.
Sketch, Fig. 1a. GL photograph, Fig. 1. The fossil whose photograph is above is No. 14900 in the Mazon Creek Collection of the Illinois State Museum. Note: the scan of the original page 19 is here. The original page was letter size but the image may have been cropped slightly.  To view any of these images at high resolution (300 dots per inch instead of 100 as on the full-page images) right-click on the image and select view image.