A Dictionary of Music and Musicians/Chair Organ
CHAIR ORGAN, a corruption of choir organ, in use in the last century, not impossibly arising from the fact that in cathedrals the choir organ often formed the back of the organist's seat.
From volume 1 of the work.
CHAIR ORGAN, a corruption of choir organ, in use in the last century, not impossibly arising from the fact that in cathedrals the choir organ often formed the back of the organist's seat.