Difference between revisions of "Hour glass"
Jump to navigation
Jump to search
(Added information) |
DavidB4-bot (talk | contribs) (Spelling, grammar, and general fixes) |
||
| Line 1: | Line 1: | ||
[[Image:2699.jpeg|right|thumb|200px]] | [[Image:2699.jpeg|right|thumb|200px]] | ||
| − | An '''hour glass''' is an obsolete [[time]]-keeping device. It is made up of two bulbs connected by a narrow passage, through which sand flows at a given rate. Hourglasses were probably invented in [[Alexandria]], [[Egypt]] between 200 and 300 A.D. <ref> | + | An '''hour glass''' is an obsolete [[time]]-keeping device. It is made up of two bulbs connected by a narrow passage, through which sand flows at a given rate. Hourglasses were probably invented in [[Alexandria]], [[Egypt]] between 200 and 300 A.D.<ref> |
{{Cite book | {{Cite book | ||
| publisher = W. & R. Chambers, Ltd. | | publisher = W. & R. Chambers, Ltd. | ||
| Line 10: | Line 10: | ||
| date = | | date = | ||
| year = | | year = | ||
| − | }}</ref> | + | }}</ref> Though they are no longer used for the purpose of keeping time, they are sometimes used in lieu of electronic timers, for example, as egg timers. |
==Sources== | ==Sources== | ||
{{reflist}} | {{reflist}} | ||
| − | [[ | + | [[Category:Technology]] |
Latest revision as of 14:31, June 24, 2016
An hour glass is an obsolete time-keeping device. It is made up of two bulbs connected by a narrow passage, through which sand flows at a given rate. Hourglasses were probably invented in Alexandria, Egypt between 200 and 300 A.D.[1] Though they are no longer used for the purpose of keeping time, they are sometimes used in lieu of electronic timers, for example, as egg timers.
Sources
- ↑ The Book of Days: A Miscellany of Popular Antiquities in Connection with the Calendar. W. & R. Chambers, Ltd..