|
|
Time Standard of the Dark Ages: The H2O
Clock |
|
Time Standard of the Dark Ages: The H2O Clock Water clocks were among the earliest timekeepers that didn't depend on the observation of celestial bodies. One of the oldest was found in the tomb of Amenhotep I, buried around 1500 B.C. Later named clepsydras ("water thief") by the Greeks, who began using them about 325 B.C., these were stone vessels with sloping sides that allowed water to drip at a nearly constant rate from a small hole near the bottom. Markings on the inside surfaces measured the passage of "hours" as the water level reached them. These clocks were used to determine hours at night, but may have been used in daylight as well. A huge collection of my 'Factoids' can be accessed from my 'Kirt's Cogitations' table of contents. Tech Topics Smorgasbord, another manifestation of Factoids, are be found on these pages: | 1
| 2 |
3 |
4 | 5
| 6 | 7
| 8 | 9
| 10 |
11 | 12 |
13 | 14
| 15 |
16 | 17 |
18 | 19
| 20 | All pertain to topics that are related to the general engineering and science theme of RF Cafe. |
|
 |
 |
 |
 |
| About RF Cafe | |
 Copyright: 1996 - 2024 Webmaster: Kirt Blattenberger, BSEE - KB3UON |
|
|
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ... All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged. My Hobby Website: AirplanesAndRockets.com
|
|
