Oil-lamp clock
Query URLs
https://term.museum-digital.de/md-de/tag/11644
- Note
- "Oil-lamp clocks are clocks consisting of a graduated glass reservoir to hold oil - usually whale oil, which burned cleanly and evenly - supplying the fuel for a built-in lamp. As the level in the reservoir dropped, it provided a rough measure of the passage of time.
The principle behind such a time-keeping device is that it measure a quantity that either decreases or increases at a constant rate. Lamps or candles, burning fuel at a steady pace, fit this category, and as a bonus produce useful light. Hourglasses depend on the steady draining of fine sand through a small aperture. Water clocks or clepsydra measure a gain or loss of water by using drops of uniform size and frequency. The Persian fenjaan made use of the constant time it took for the sinking of a floating bowl with a hole in its underside." - (en.wikipedia.org 10.06.2020)
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Nachtlicht mit Öluhr
Nachtlicht mit Öluhr, 18....
Object information
Image: Verein der Freunde und Förderer des Siegerlandmuseums e.V. - CC BY-NC-SA
References
Synonyms
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