Alfred James Hipkins and Kathleen Schlesinger

“ The arrangement of reed compartments in American organs does not essentially differ from that of harmoniums; but there are often two keyboards, and then the solo and combination stops are found on the upper manual. The diapason treble register is known as “melodia”; different makers occasionally vary the use of fancy names for other stops. The “sub-bass,” however, an octave of 16 ft. pitch and always apart from the other reeds, is used with great advantage for pedal effects on the manual, the compass of American organs being usually down to F (FF, 5 octaves) . ”

“ The modern physharmonica is a harmonium without stops or percussion action; it does not therefore speak readily or clearly. It has a range of five to six octaves. Other instruments of similar type are the French melophone and the English seraphine, a keyboard harmonica with bellows but no channels for the tongues, for which a patent was granted to Myers and Storer in 1839 ”

“ The American organ has a softer tone than the harmonium; this is sometimes aided by the use of extra resonators, termed pipes or qualifying tubes, as, for instance, in Clough & Warren’s (of Detroit, Michigan, U.S.) . The blowing being also easier, ladies find it much less fatiguing. The expression stop can have little power in the American organ, and is generally absent ”

“ There were eight registers including the pedal, and the positive on the first keyboard had reed stops furnished with beating reeds. Biot insists on the importance of the regulating wires (Fr. rasettes; Ger. Krücken) for determining the vibrating length of the reed tongue and maintaining it invariable. These are clearly shown in his diagram (see article Free Reed Vibrator, fig. 1) ; they do not essentially differ from those used with the beating-reed stops in his organ (fig. 76, pl. II.) , or indeed from those figured by Praetorius. ”

“ The drawstops bearing the names of the different registers in imitation of the organ, admit, when drawn, the wind from the wind-chest to the corresponding reed compartments, shutting them off when closed. These compartments are of about two octaves and a half each, there being a division in the middle of the keyboard scale dividing the stops into bass and treble. A stop being drawn and a key pressed down, wind is admitted by a corresponding valve to a reed or vibrator (fig. 1) . ”

“ Dawes’s “melody attachment” is to give prominence to an air or treble part by shutting off in certain registers all notes below it. This notion has been adapted by inversion to a “pedal substitute” to strengthen the lowest bass notes. The “tremolo” affects the wind in the vicinity of the reeds by means of small bellows which increase the velocity of the pulsation according to pressure; and the “sourdine” diminishes the supply of wind by controlling its admission to the reeds. ”

“ By it a swell shutter or rail is kept in constant movement, proportioned to the force of the air-current. Another very clever improvement introduced by these makers, who were the originators of the instrument itself, is the “vox humana,” a smaller rail or fan, made to revolve rapidly by wind pressure ”

“ Ztg. Bd. xxiii. pp. 133-139 and 149-154, with diagrams on p. 167 which are not absolutely correct in small details. ↑ J. B. Biot, Traité, tome ii. p. 174. ↑ Harmonie universelle (Paris, 1636) , livre v., prop. xxxv. ↑ Wien. musik. Ztg. Bd. v. Nos. 39 and 87. ↑ Allg. musik. Ztg. ”