Front:
RESTORATION OF TREES WHICH FORMED COAL.
CALAMITES
LEPIDODENDRON
SIGILLARIA
TREE FERN
CORDAITES
100
A FOREST OF THE COAL PERIOD, FIELD MUSEUM OF NATURAL HISTORY, CHICAGO, ILLINOIS
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"PHOSTINT"
Tet nam • ta v 1. I or
MADE ONLY SY DET HOIT PUSUSMING CO.
XXI
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