The Lissajous tuning forks by R. Koenig are Iivented in 1855 by the French physicist Jules Antoine Lissajous (1822-1880), these tuning forks are part of an apparatus for the visualization and analysis of sound vibrations. This particular set was manufactured by the Parisian scientific instrument maker Rudolph Koenigs (1832-1901) for educational demonstrations and also for the fine calibration of new tuning forks. Measurements wooden box 38 x 18 x 9 cm and late 19th C
