GCDEFG  . This was the most

common scheme for the short octave during the 16th and 17th centuries, although others are occasionally found . Praetorius also gives examples in which the black notes of the short octave were divided into two halves, or separate keys, the forward ' See the original Greek with translation by Charles Maclean in " The Principle of the Hydraulic Organ," Intern . Musikges. vi . 2, 219-220 (Leipzig 1905) . See Clement Loret's account in Revue archeologique, pp . 76-102 (Paris, 189o) . Early Hist. of Spanish Music (London, 1807) . Reproduced by Dr Alwin Schulz in Deutsches Leben im XIV. u . X V . Jhdt., figs . 522 seq .

(

Vienna, 1892) . " De diversis monocordis, pentacordis, etc., ex quibus diversa formantur instrumenta musica," reproduced by Edm. van der Straeten in Hist. de la musique aux Pays-Bas, i . 278 . half for the drone note, the back half for the chromatic semitone, thus: Ftl IG# b E Bb C F GAB C This arrangement, which accomplishes its object without sacrifice, was to be found early in the 17th century in the organs of the monasteries of Riddageshausen and of Bayreuth in Vogtland . See A . J . Hipkins, History of the Pianoforte (London, 1896), and the older works of Girolamo Diruta (1597), Praetorius (1618), and Mersenne (1636) . (K .