OCR Text |
Show VARIOUS KINDS OF DAY8. Word Said to Have No Real Meaning Without Defining Adjective. Flvo kinds of tiny aro recognized, and it has been bald that tho word "doy" has no real meaning without an adjective defining what kind of a day Is meant. Thcro Is n civil day, the astronomlcnl dny, tho apparent solar day, tho mean solar day, and tho sidereal sid-ereal dny. Tho civil dav begins at tho midnight preceding mean noon, nnd consists of twenty-four hours counted after twclvo o'clock; tho astronomical day begins twelve hours after tbo civil day, or at tho mean noon of tho corresponding cor-responding civil dny. Theso hours aro reckoned from 0 to 24. It will bo seen, therefore. Hint whllo lOhr. 12mln., January 1st astronomical time, Is also lOhr. 12mln. January 1st civil tlmo, yet 22hr. 12mln., January 1st astronomical as-tronomical time. Is nlso lOhr. 12mln. a. m., Jnnuary 2nd civil tlmo. There aro many anomalies growing out ol this uso of tho clll dny, and thcro are many arguments In favor of using the astronomical dny. It is ono of the reforms which undoubtedly will como somo time. |