DISTRIBUTED BY RICH-HOLT CO., SANDUSKY, OHIO
THE BLUE HOLE, CASTALIA, OHIO
Six miles west of Sandusky, Ohio, on Route
269. The depth of the Blue Hole is unknown. The
visible depth is apparently 50 or 60 feet. It finds
its source in an underground river and maintains
a temperature of 48 degrees, winter and summer.
It is not affected by floods, or drought. The vol-
ume of water flowing from this marvelous spring
is seven million gallons daily, sufficient to supply
a city of 75,000 population.
CURTEICHCOLOR Ⓡ 3-D NATURAL COLOR REPRODUCTION (REG. U. S. A. PAT
OFF.)
4DK-461
PLACE
