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27. Natural Reality / D. Time / 3. Parts of Time / d. Measuring time

[how we measure intervals and transits of time]

5 ideas
We measure change by time, and time by change, as they are interdefined [Aristotle]
Circular motion is the most obvious measure of time, and especially the celestial sphere [Aristotle]
If there is no uniform motion, we cannot exactly measure time [Newton]
We can never show that two successive periods of time were equal [Locke]
We use calendars for the order of events, and clocks for their passing [Bardon]