I have this vague itch to build a series of clocks as a hobby, but without a modern clock for reference. Eg build a mechanical…
I have this vague itch to build a series of clocks as a hobby, but *without* a modern clock for reference. Eg build a mechanical clock, but use an hour glass to cal9brate first run. Bootstrap time all the way to atomic.
— Venkatesh Rao (@vgr) March 15, 2019