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- Oil-lamp_clock abstract "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.".
- Oil-lamp_clock thumbnail Oil-lamp_clock00.jpg?width=300.
- Oil-lamp_clock wikiPageID "17652020".
- Oil-lamp_clock wikiPageRevisionID "543394029".
- Oil-lamp_clock hasPhotoCollection Oil-lamp_clock.
- Oil-lamp_clock subject Category:Clocks.
- Oil-lamp_clock subject Category:Horology.
- Oil-lamp_clock type Artifact100021939.
- Oil-lamp_clock type Clock103046257.
- Oil-lamp_clock type Clocks.
- Oil-lamp_clock type Device103183080.
- Oil-lamp_clock type Instrument103574816.
- Oil-lamp_clock type Instrumentality103575240.
- Oil-lamp_clock type MeasuringInstrument103733925.
- Oil-lamp_clock type Object100002684.
- Oil-lamp_clock type PhysicalEntity100001930.
- Oil-lamp_clock type Timepiece104437953.
- Oil-lamp_clock type Whole100003553.
- Oil-lamp_clock comment "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.".
- Oil-lamp_clock label "Oil-lamp clock".
- Oil-lamp_clock label "Reloj de lámpara de aceite".
- Oil-lamp_clock label "Öllampenuhr".
- Oil-lamp_clock sameAs Öllampenuhr.
- Oil-lamp_clock sameAs Reloj_de_lámpara_de_aceite.
- Oil-lamp_clock sameAs m.0463j9y.
- Oil-lamp_clock sameAs Q297117.
- Oil-lamp_clock sameAs Q297117.
- Oil-lamp_clock sameAs Oil-lamp_clock.
- Oil-lamp_clock wasDerivedFrom Oil-lamp_clock?oldid=543394029.
- Oil-lamp_clock depiction Oil-lamp_clock00.jpg.
- Oil-lamp_clock isPrimaryTopicOf Oil-lamp_clock.