Akwai da dama ambato na wannan a cikin tarihi records da wallafe-wallafen na zamanin. Alal misali, a cikin Theaetetus, Plato ya ce cewa "Waɗannan mutane, a daya hannun, ko da yaushe magana a cikin gaggawa, ga gudãna ruwa urges su a kan". Wani ambaci ya auku a cikin Lucius Apuleius 'The Golden Ass: "The Clerk na Kotun fara bawling sake, wannan lokaci summoning babban shaida ga fitina ya bayyana. Up wani tsohon mutum, wanda ban sani ba. Ya aka gayyace su yi magana muddin akwai ruwa a cikin agogo; wannan shi ne wani m duniya a cikin abin da ruwa da aka zuba ta hanyar wani funnel a cikin wuyansa, da kuma daga abin da shi a hankali tsere ta hanyar m perforations a zamanin BC. A Theaetetus, Plato ya ce cewa "Waɗannan mutane, a daya hannun, ko da yaushe magana a cikin sauri sauri, domin ruwa gudãna ya ci gaba da kara da sauri fiye da a lokacin da Girkanci agogo da aka yi amfani da shi a cikin wani lokaci. Wannan matsala ya zama mafi m, saboda haka, a lokacin da aka
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