An edition of Principles and practice of just intonation (1859)

Principles and practice of just intonation

with a view to embodying the results of the sol-fa associations, as illustrated on the enharmonic organ, presenting the power of executing in twenty keys (with major and minor to each, except the three with most flats) and a correction for changes of temperature, built by Messrs. Robson ... calculated for taking the place of the choir organ in a cathedral, and to be learned in six lessons. With an appendix tracing the identity of design with the enharmonic of the ancients

By T. Perronet Thompson