J. KOHLER'S NEW PATENT LEVER INSTRUMENTS, WITH FURTHER IMPORTANT IMPROVEMENTS. T KOHLER, 35, HENRIETTAeI • ..
... and Navy. The advantages of this Patent are— I. All the Tones and Semitones produced by the Lever are as perfect as the Natural Notes on the Instrument. - 2. The intervals in the DIATONIC and CHROMATIC SCALES are perfect, the compass greater, and the most ...