. Time and its measurement . ever, this ring represents theaverage day and night. When we reachthe Polar Circle, still going north, thedailv rising and setting of the sun grad- TIME AND ITS MEASUREMENT 61 ually ceases till we reach the great one-year day at the Pole, consisting- of sixmonths darkness and six months us now assume that an astronom-ical observatory is established hereand the great equatorial placed pre-cisely on the pole. At this point, localtime, day and night, and the date litic, al-most cease to have a meaning. Forthis very reason universal time wouldbe the only prac
. Time and its measurement . ever, this ring represents theaverage day and night. When we reachthe Polar Circle, still going north, thedailv rising and setting of the sun grad- TIME AND ITS MEASUREMENT 61 ually ceases till we reach the great one-year day at the Pole, consisting- of sixmonths darkness and six months us now assume that an astronom-ical observatory is established hereand the great equatorial placed pre-cisely on the pole. At this point, localtime, day and night, and the date litic, al-most cease to have a meaning. Forthis very reason universal time wouldbe the only practical method; there- hours within five seconds ! At the polethe day would commence at the sameinstant as at some assumed place, andthe day and night ring would representworking and sleeping as at that this observatory to be in tele-graphic communication with NewYork, then it would be best for the at-tendants to set their day and night toNew York, so as to correspond with itsbusiness hours. Many curious supposi-.
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Keywords: ., boo, bookcentury1900, bookdecade1900, booksubjectclocksandwatches
