cross-posted from:

In different locations within the Late Ptolemaic Temple of Hathor at Dendera in Egypt are curious wall engravings which Egyptologists cannot explain in traditional religio-mythic terms, but about which electrical engineers are finding very modern interpretations.

In one chamber, No. 17, the topmost panel, depicts Egyptian priests operating what look like oblong tubes, performing various specific tasks. Each tube has a serpent extending its full length inside. Swedish engineer Henry Kjellson, in his book Forvunen Teknik (Disappeared Technology), noted that in the hieroglyphs these serpents are translated as seref, which means to glow, and believes it refers to some form of electrical current.