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Sundial

Description: What time is it? Without clouds, the sun and a sundial can help tell time. First developed about 3500 B.C., the sundial is the oldest type of timekeeping device. This early 1900s sundial marks the progress of the sun across its face. The shadow from the sun tells the time. Because the earth is curved and rotates, a sundial does not keep accurate time like digital clocks!
Source: http://www.digitalindy.org/cdm/ref/collection/tcm/id/1900
Collection: The Children's Museum of Indianapolis
Rights: http://rightsstatements.org/vocab/InC/1.0/
Copyright: This file is licensed under a CC BY-SA 3.0 license by The Children’s Museum of Indianapolis.
Subjects: Sundials
Time measurements
Nineteen hundreds (Decade)

Further information on this record can be found at its source.