MESSRS. GRINDLAY & CO. THE ATTENTION of their Friends and Patrons to the ALTERATION OF ram Trans IbE mend* ..
... Navy. The advantages of this Patent are :- 1. 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 Cnaomartc Se. are perfect, the compass greater, and the most rapid ...