The History of the Pianoforte: With an Account of the Theory of Sound and Also of the Music and Musical Instruments of the Ancients. E-book. Formato PDF Edgar Brinsmead   -  Forgotten Books, 2017  - 

Although some millions of pianofortes have been manufactured in Great Britain, France, Germany, and America, it is surprising how few pianists know any thing respecting the theory, construction, and history of their favourite instrument.