Simply using the principle of expansion, a bicycle, chair or car appears or disappears from its enclosure, according to the temperature and the atmospheric pressure. Similarly, a text by Alice Ferney entitled "Eros, or the Warmth of Human Touch", engraved on a large gilded panel, can be read when the visitor places his hands on the metal enclosure containing it: slowly, with the warmth of human touch, the panel emerges from its surroundings, revealing its mysteries. The video [2.8 mo, about 30sc with adsl 512k]