Instrument with bellows << Back exhibit information online Harmonium Theodor Mannborg Borna 1889 Inv.-Nr. 3783 Instrument with bellows exhibited in  The Romatic Period previously owned by Foundation "Leipziger Pianofortefabrik", acquired in 1961     This instrument was made in the year the well-known Mannborg harmonium factory was founded. The instrument's heavy, darkly-stained oak case, with turned and carved touches including (Beethoven's profile at the top) are features of the "historicist" approach then vogue. The harmonium produces sound when the air from a pedal-operated bellows vibrates free reads (unlike the organ, it has no pipes). A number of timbres (forte-violoncello,; sub bass; violincello; bass coupler; treble coupler, vox humana; viola; melodia; forte-melodia) along with two knee-operated "expression" stops (which allow the player to control volume) give the player many expressive capabilities. Because of its wide range of tone colours the harmonium was an especially popular instrument in the second half of the 19th century.