| Sir Richard Phillips - Arts - 1817 - 316 pages
...over ; the weeks into seven days, or rotations of the earth on its own axis ; those rotations into 24 **hours ; each hour into 60 minutes ; and each minute into 60 seconds,** or periods, in which a pendulum that is 39,2. inches long, will vibrate. The vibration of such a pendulum,... | |
| Harvey Goodwin - Mathematics - 1846 - 468 pages
...days recognised by astronomers, viz., Sidereal, Solar, and Mean Solar. Each of them is divided into 24 **hours, each hour into 60 minutes, and each minute into 60 seconds.** The sidereal day is the interval between two successive transits of the true first point of Aries;... | |
| Dionysius Lardner - Astronomy - 1854
...revolution of the firmament is called a SIDEREAL DAY. This interval is divided, like a common day, into 24 **hours, each hour into 60 minutes, and each minute into 60 seconds.** Since in 24 sidereal hours the sphere turns through 360°, and since its motion is rigorously uniform,... | |
| Dionysius Lardner - Astronomy - 1853 - 852 pages
...of the firmament is called a SIDEREAL i>.\ t . This interval is divided, like a common day, into 24 **hours, each hour into 60 minutes, and each minute into 60 seconds.** Since in 24 sidereal hours the sphere turns through 360°, and since its motion is rigorously uniform,... | |
| Dionysius Lardner - 1860
...revolution of the firmament is called a SXDEBEAL DAT. This interval is divided, like a common day, into 24 **hours, each hour into 60 minutes, and each minute into 60 seconds.** Since in 24 sidereal hours the sphere turns through 360°, and since its motion is rigorously uniform,... | |
| George Augustus Walton - Arithmetic - 1864 - 348 pages
...earth takes to turn so as to bring the sun to the same meridian again. The solar day k divided into 24 **hours, each hour into 60 minutes, and each minute into 60 seconds.** The denominations of time are centuries, years, months, weeks, days, hours, minutes and seconds, TABLE.... | |
| Elias Loomis - Astronomy - 1866 - 338 pages
...— The time of one complete revolution of the firmament is called a sidereal day. This interval is **divided into 24 sidereal hours, each hour into 60 minutes, and each minute into 60 seconds.** Since the celestial sphere turns through 360° in 24 sidereal hours, it turns through 15° in one sidereal... | |
| Alfred Marshall Mayer - Matter - 1868 - 115 pages
...which is used by astronomers, is 3m. 56'5s. less than the solar day. Both days are divided into 24 **hours ; each hour into 60 minutes ; and each minute into 60 seconds** ; the seconds are sub-divided decimally. The hours are designated by the sign h ; the minutes by m... | |
| Elias Loomis - Astronomy - 1870 - 344 pages
...— The time of one complete revolution of the firmament is called a sidereal day. This interval is **divided into 24 sidereal hours, each hour into 60 minutes, and each minute into 60 seconds.** Since the celestial sphere turns through 360° in 24 sidereal hours, it turns through 15° in one sidereal... | |
| Elias Loomis - Astronomy - 1870 - 254 pages
...— The time of one complete revolution of the firmament is called a sidereal day. This interval is **divided into 24 sidereal hours, each hour into 60 minutes, and each minute into 60 seconds.** Since the celestial sphere turns through 360° in 24 sidereal hours, it turns through 15 degrees in... | |
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