Front:
GREETINGS
Sault Ste Marie
LOCK CITY
Back:
THE "SOO" LOCKS
Sault Ste. Marie, Michigan
A favorite tourist attraction in Michigan's upper
peninsula, these locks are the busiest in the world.
The purpose of the Locks is to overcome the ap-
proximately 20-foot difference in level between
Lake Superior on the west and Lake Huron on the
southeast. Ships in the Locks are raised
or
lowered by the principles of gravity and water
seeking its own level.
P18239
Pub. by the Hiawatha Card Co., P. O. Box 56, Ypsilanti, Mich.
by COLOURPICTURE PUBLISHERS, INC., Boston 15, Mass., U.S.A.
Colorslides Free catalog
Hiawatha Co., Box 56, Ypsilanti, Mich.
HERE
