It stands in a gallery over the west door of the Cathedral. It has five manuals of 56 notes each, CC to g|3|, pedal of 30 notes, CCC to F; 86 sounding stops "controlled by 110 registers"; 32 combination pedals, and 6,000 pipes, the longest being 32 feet. The action is Cavaille-Coll's latest improvement on the Barker pneumatic lever. The wind reservoirs contain 35,000 litres of compressed air, fed by 6 pairs of _pompes_ furnishing 600 litres of air per second. Here is the specification: PEDAL ORGAN (16 STOPS). FEET. FEET. Principal-Basse 32 Quinte 5 2/3 Contre-Basse 16 Septieme 4 4/7 Grosse Quinte 10 2/3 Centre Bombarde 32 Sous-Basse 16 Bombarde 16 Flute 8 Trompette 8 Grosse Tierce 6 2/5 Basson 16 Violoncelle 8 Basson 8 Octave 4 Clairon 4 FIRST CLAVIER (GRAND CHOEUR), 12 STOPS. FEET. FEET. Principal 8 Larigot 1 1/3 Prestant 4 Septieme 1 1/7 Bourdon 8 Piccolo 1 Quinte 2 2/3 Tuba Magna 16 Doublette 2 Trompette 8 Tierce 1 3/5 Clairon 4 SECOND CLAVIER (GBAND ORGUE), 14 STOPS. FEET. FEET. Violon-Basse 16 Octave 4 Montre 8 Doublette 2 Bourdon 16 Fourniture, 2 to 5 ranks Flute Harmonique 8 Cymbale, 2 to 5 ranks Viola de Gambe 8 Basson 16 Prestant 4 Basson-Hautbois 8 Bourdon 8 Clairon 4 THIRD CLAVIER (BOMBARDES), 14 STOPS. FEET. FEET. Principal-Basse 16 Quinte 2 2/3 Principal 8 Septieme 2 1/7 Sous-Basse 16 Doublette 2 Flute Harmonique 8 Cornet, 2 to 5 ranks Grosse Quinte 5 1/3 Bombarde 16 Octave 4 Trompette 8 Grosse Tierce 3 1/5 Clairon 4 FOURTH CLAVIER (POSITIF), 14 STOPS.