[time-nuts] gravity controlled pendulumn clock?
dot at dotat.at
Wed Dec 14 12:12:45 EST 2011
Chuck Harris <cfharris at erols.com> wrote:
> Metric is purely arbitrary, as are all of the variants on the
> English system.
They are not equally arbitrary. The metric system was constructed from the
size and rate of rotation of the Earth and the density of water, plus some
well-organized constant factors. (The relation between length, volume, and
mass is elegantly simple.) Customary measures are based on artefacts whose
size cannot be recovered if they are lost, with irregular subdividing
factors and no commonality between the units for different physical
f.anthony.n.finch <dot at dotat.at> http://dotat.at/
Fair Isle: West, veering northwest, 5 to 7, occasionally gale 8 at first.
Rough or very rough, occasionally high. Squally showers. Moderate or good.
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