 Except for a three-year stay in Berlin (1822–26), he spent the remainder of his life in Dublin, where he died in 1846.Logier invented the Chiroplast, a sliding frame meant as a pedagogical device to guide the hands and fingers while playing the piano, the intention being to improve and control the position of the hand and wrist.By staging public demonstrations of the mechanism and producing publications and studies to support his theories, the method became very popular within a short period of time.