They had cardboard in 1800?,(reply>), They had vibrators in 1800 ? ¶:,(reply>), I wasn't corrugated.  Just regular cardboard.,(reply>), The term has been used since at least 1848. when Anne Brontë mentioned it in her novel, The Tenant of Wildfell Hall. I suspect the earlier dry piles were made with felt disks; which would hold the electrolyte.,(reply>), Really, the further back you go the more likely they're using 'cardboard' than something we'd call paper today.,(reply>), they had thick paper in 1800, yes.