n is the time at whichthe sun reaches his highest point onany given day. At sea this is deter-mined generally by a sextant, whichsimply measures the angle between thehorizon and the sun. The instrumentis applied a little before noon and theobserver sees the sun creeping upwardslower and slower till… … Figf. 2—Portable Bronze Sundial from the Ruins olHerculaneum several officers on a large ship will takethe meridian passage at the same timeand average their readings, so as toreduce the personal error. All ofwhich is merely a greater degree ofaccuracy than that of the man who ob-serves his shadow.…
Time · Clocks and watches
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