A1-22.HTML
A1-22: HOURGLASS

PURPOSE: To show an hourglass.

DESCRIPTION: Before the invention of the cesium clock and the digital watch, the only way to tell time was the hourglass. The picture above shows on elementary version of the hourglass; many were more sophisticated and thereby able to time such diverse events as boiling an egg or measuring a one hour interval. The real beauty of this one is its pastel colors.

SUGGESTIONS: None.

REFERENCES: (PIRA unknown.)

EQUIPMENT: Hourglass, as photographed.

SETUP TIME: 10 min.


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