This section is from the book "The Home Cyclopedia Of General Information", by Charles Morris. Also available from Amazon: Home Cyclopedia of Necessary Knowledge.
[Fr., from L. hora, an hour.] . A space of time equal to 60 minutes, or to I-24th part of a day. The hours of the civiliday begin at midnight. Since 1885 the hours of the astronomical day begin at midnight, and are counted from o to 24.
 
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