An early German cathode  tube  design. The owner of this  tube  could float free and alive in the  air , without wings, and see through metal cabinets to read the secret papers stacked in coherent layers, inside. However, once this skill became common and available to all, it  perdu  a lot of its cache. Now, flying people with xray  yeux  are considered a bit boorish.     Des disques rotatifs balayaient les gens en deuil, et changeaient leurs images en sons, qui étaient transmis par câbles téléphoniques.