ELD4840708: Acoustic: a test session on deaf-and-dumb people of the audiphone of Colladon, designed by the Swiss physicist, specialist in acoustics, Jean-Daniel (Jean Daniel) Colladon (1802-1893) on deaf-and-dumb people of the audiphone of Colladon. On, a type of hearing aid consisting of a diaphragm that, when placed against the upper teeth, conveys sound vibrations to the inner ear Engraving from “Popular Science” 1880 Private collection / Bridgeman Images
ELD4840845: La ronde des aveugles, groupe de la aveugles dans un centre d'education specialise, Normandy - Photographie, 1925 environ - The circle of the blind people, a group of partially sighted in a specialized school for visually impaired, Normandy - 1925 ca - Photography Collection privee / Bridgeman Images
ELD4841550: A fantasy in Morocco, equestrian entertainment, practiced mainly by the Berberes of the Maghreb, in which riders do aerobatic exercises loading and unloading their arms' (View of a Fantasia, traditional exhibition of horsemanship in the Maghreb performed during cultural festivals and to close Berber wedding celebrations) Engraving from The Peoples of the Earth” by Charles Delon, 1905 Private Collection / Bridgeman Images