| Sir Richard Phillips - 1817 - 316 páginas
...one day 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 - 1846 - 468 páginas
...three kinds of 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;... | |
| Harvey Goodwin - 1849 - 528 páginas
...three kinds of 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** Go seconds. The sidereal day is the interval between two successive transits of the true first point... | |
| Dionysius Lardner - 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, it... | |
| Dionysius Lardner - 1853 - 852 páginas
...revolution 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, it... | |
| James R. Christie - 1853 - 118 páginas
...are the same, and therefore, if each interval be called a sidereal day, and divided into 24 sidereal **hours, each hour into 60 minutes, and each minute into 60 seconds,** then, if the length of our pendulum be such that it makes 86400 beats in that interval, the interval... | |
| 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, it... | |
| George Augustus Walton - 1864 - 348 páginas
...the time the 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 - 1866 - 338 páginas
...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 - 1868 - 115 páginas
...The sidereal day, 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... | |
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