De ska ha används för att plätera föremål med tror man.
"The Baghdad Battery ~ 250 BCE"
http://www.thelivingmoon.com/43ancients ... ty_01.html
Finns fler atriklar här:
http://www.thelivingmoon.com/43ancients ... #Geoglyphs
Världens äldsta batteri?
Re: Världens äldsta batteri?
Det är inte en direkt förtroendeingivande sida du länkar till där... 
Det råder delade meningar om att det verkligen var batterier, de kan ha varit väderskyddade lagringskärl för dokument eller något annat.
Dessutom är dateringen gjord för mycket länge sedan, de behöver inte vara från 250 fkr utan kan vara från 6-700-talet även om det inte spelar så stor roll för vad det är.
wiki-artikeln har fler detaljer:
http://en.wikipedia.org/wiki/Baghdad_Battery
"However, even among those believing the artifacts to be electrical devices, electroplating as a use is not well-regarded today. Paul Craddock of the British Museum said "The examples we see from this region and era are conventional gold plating and mercury gilding. There’s never been any untouchable evidence to support the electroplating theory."[3] The gilded objects that König thought might be electroplated are now believed to have been fire-gilded (with mercury). Reproduction experiments of electroplating by Arne Eggebrecht consumed "many" reproduction cells to achieve a plated layer just one micrometre thick. Other scientists noted that Eggebrecht used a more efficient, modern electrolyte; using only vinegar, the battery is very feeble."
" The bitumen completely covers the copper cylinder, electrically insulating it, so no current can be drawn without modifying the design.
There are no wires or conductors with them.
No widely accepted electrical equipment is associated with them. (Controversial stone reliefs depicting arc lights have been suggested, however the voltages obtained are orders of magnitude below what would be needed to produce arc lighting[citation needed]).
A bitumen seal, being thermoplastic, is excellent for forming a hermetic seal for long-term storage. It would be extremely inconvenient, however, for a galvanic cell, which would require frequent topping up of the electrolyte (if they were intended for extended use).
The artifacts strongly resemble another type of object with a known purpose — namely, storage vessels for sacred scrolls from nearby Seleucia on the Tigris. Those vessels do not have the outermost clay jar, but are otherwise almost identical. Since it is claimed[by whom?] these vessels were exposed to the elements, it is possible[opinion] that any papyrus or parchment inside had completely rotted away, perhaps leaving a trace of slightly acidic organic residue."
Det är dock en mycket intressant historisk artefakt, lite som Antikytheramekanismen:
http://en.wikipedia.org/wiki/Antikythera_mechanism
Det råder delade meningar om att det verkligen var batterier, de kan ha varit väderskyddade lagringskärl för dokument eller något annat.
Dessutom är dateringen gjord för mycket länge sedan, de behöver inte vara från 250 fkr utan kan vara från 6-700-talet även om det inte spelar så stor roll för vad det är.
wiki-artikeln har fler detaljer:
http://en.wikipedia.org/wiki/Baghdad_Battery
"However, even among those believing the artifacts to be electrical devices, electroplating as a use is not well-regarded today. Paul Craddock of the British Museum said "The examples we see from this region and era are conventional gold plating and mercury gilding. There’s never been any untouchable evidence to support the electroplating theory."[3] The gilded objects that König thought might be electroplated are now believed to have been fire-gilded (with mercury). Reproduction experiments of electroplating by Arne Eggebrecht consumed "many" reproduction cells to achieve a plated layer just one micrometre thick. Other scientists noted that Eggebrecht used a more efficient, modern electrolyte; using only vinegar, the battery is very feeble."
" The bitumen completely covers the copper cylinder, electrically insulating it, so no current can be drawn without modifying the design.
There are no wires or conductors with them.
No widely accepted electrical equipment is associated with them. (Controversial stone reliefs depicting arc lights have been suggested, however the voltages obtained are orders of magnitude below what would be needed to produce arc lighting[citation needed]).
A bitumen seal, being thermoplastic, is excellent for forming a hermetic seal for long-term storage. It would be extremely inconvenient, however, for a galvanic cell, which would require frequent topping up of the electrolyte (if they were intended for extended use).
The artifacts strongly resemble another type of object with a known purpose — namely, storage vessels for sacred scrolls from nearby Seleucia on the Tigris. Those vessels do not have the outermost clay jar, but are otherwise almost identical. Since it is claimed[by whom?] these vessels were exposed to the elements, it is possible[opinion] that any papyrus or parchment inside had completely rotted away, perhaps leaving a trace of slightly acidic organic residue."
Det är dock en mycket intressant historisk artefakt, lite som Antikytheramekanismen:
http://en.wikipedia.org/wiki/Antikythera_mechanism
