Front:
MILWAUKEE PUBLIC MUSEUM GROUP
9004
WAVE EROSION
DEVIL'S ISLAND.
Back:
"PHOSTINT”
TRADE MARK REG. - U. S. PAT. OFF.
MADE ONLY SY DETROIT PUBLISHING CO.
MILWAUKEE PUBLIC MUSEUM GROUP.
Wave Erosion - Devil's Island, Lake Super-
ior. Devil's Island is the most northern of
the Apostle Islands and is exposed to the full
fury of the waves of Lake Superior. Its soft
sandstone rocks are easily eroded and the
waves have here carved a bewildering array of
caves and pillars which extend along the entire
northern shore of the Island,
COPR. MILWAUKEE PUBLIC MUSEUM, MILWAUKEE, W16.
THIS SPACE MAY BE USED FOR MESSAGE
XXV
