Movement of the sun from dawn to dusk tracked the length of the day.
Location of the sun tracked the seasons.
The Sun Dial was used by the Sumarians and early Egyptians.
The Egyptians constructed four-sided and tapered monuments, or obelisks, geographically located in certain places. These obelisks were believed to have been constructed around 3500 BC. A shadow would be cast by the obelisk as the sun made it’s way across the sky. This obelisk would be marked out in certain sections to see the two halves of the day.
Later, around 1500 BC a new form of clock, or sundial, permitted one to measure the passage of hours within a day.
These Sundials might be large enough to walk around, perhaps see from great heights?
Or, the dials might be small enough to carry in a bag or pocket, or wear around the neck.
Here are some post cards available on Zazzle that show various types and sizes of sundials.
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