Fig. 9—Modern SandGlass or Hour Glass … Fig. 10—Tower of the Winds—Athens, Greece attributed to the astronomer Andronicos, and was built about 50 B. C. It i:octagonal in plan and although 27 f1in diameter and 44 ft. high, it looks lik^a sentry box when seen from one othe hills of Athens. It had a bronz^weather vane and in later times…
Time · Clocks and watches
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