Clavichordium

Clavichordium (Lat.), bowed harpsichord invented by Le Gay of Paris in 1763, with 122 gut strings of which half (presumably 1 string for a compass of 5 octs., or 61 strings) were played from an ordinary keyboard by leather-plectra jacks in conventional fashion, the others being controlled from a second keyboard by a continuous horsehair bow that produced “les fortes et les pianos” (204). Wright, Rowland. Dictionnaire des instruments de musique. London, 1941.