II. On just intonation in music; with a description of a new instrument for the easy control of all systems of tuning other than the ordinary equal temperament
R.H.M. Bosanquet · Proceedings of the Royal Society of London · 1873
Abstract The object of this communication is to place the improved systems of tuning within the reach of ordinary musicians; for this purpose the theory and practice are reduced to their simplest forms. A notation is described, adapted to use with ordinary written music by which the notes to be performed are clearly distinguished.