2 Free Artworks of 1878 In Geology

popular science monthly illustrations/volume 13 geology of new york (state)

PSM V13 D678 New york harbor in preglacial times

popular science monthly illustrations/volume 13 geology of new york (state)

PSM V13 D679 Hudson river and the old littoral plain

popular science monthly illustrations/volume 13 1878 maps

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