Three installments of Logier's Theoretical and Practical Study for the Piano Forte, numbered 5, 8, and 9, and all signed or initialled by him on the title pages.

In installments 8 and 9, blank staves with measured numbers are provided beneath the piano part for the student to write out the figured and fundamental basses. (These remain blank in this copy; see images). The title pages of these installments also advertise that Logier's Patent Chiroplast--a device he famously invented to improve young pianists' hand positions--is available for sale at the publisher's address. Publishing information for each installment is as follows:

No. 5: London: Self-published, printed by Clementi & Co, c. 1816. Signed Jlogier on title page. 15 pp. With excerpted biography of Haydn (2 pp.), taken from Burney's History of Music.

No. 8: London: J. Green, not later than 1825. Initialled JBL on title page. 14 pp. With excerpted biography of Mozart (2 pp).

No. 9: London: J. Green, not later than 1825. Initialled JBL on title page. 17 pp.

Autographed Logier material is quite scarce.

Johann Bernhard Logier was born to a musical family in Kassel but moved to England in 1791. He became a regimental band flautist and was posted to Ireland in 1796, where he remained for some time. It was there, in fact, that while seeking to improve the efficiency of his piano teaching, he invented the chiroplast: a sliding mechanism designed to improve the hand and wrist positions of budding pianists. After a successful trial run with his daughter in 1814, Logier devoted much of the following decade to promoting the device. His Theoretical and Practical Study for the Piano Forte was issued in a total of twelve installments between 1816 and 1825, the first of which coincided with the chiroplast's commercial release in 1816. J Green, the publisher of the method, had sold 1,600 of them by 1824.

The chiroplast became quite popular and counted Kalkbrenner and Spohr among its early adherents, although Clementi and Cramer expressed some reservations about the device. The chiroplast would continue to be manufactured through the early 1870s.