Logier, Johann Bernhard, 1777-1846.
The first companion to the royal patent chiroplast, or hand-director, a new invented apparatus for facilitating the attainment of a proper execution on the piano forte, by the inventor, J. B. Logier.
London, Printed for the author by J. Green, [182-]
Bound with the author's A seond companion to the royal patent chiroplast. London [182-]
Piano -- Studies and exercises.
Philadelphia Area Center for History of Science
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