Signednameplate below weight: ORGUES D'ÉGLISE / A. CAVAILLÉ-COLL & CIE / R. DE VAUGIRARD [94-]96 / PARIS
on left side in an ellipse: A. CAVAILLÉ-COLL FILS / 66 / FACTEUR D'ORGUES PARIS.
Inscribedabove entry pipe: Entrée
above exit pipe: Sortie
label below exit pipe: 20-8-26
on lid: 22-11 22-11
FunctionAccording to David Pantalony in Altered Sensations: Rudolph Koenig's Acoustical Workshop in Nineteenth Century Paris (Springer, 2009), this instrument "could control the input from a large bellows for use with a siren, manometer, or organ pipe. As air pressure builds, the hinged container inflates and is controlled by the sliding brass weight" (236).
Primary SourcesFor a picture of a more modern version of this instrument, see entry 83, "Cavaillé-Coll's Small Air Regulator," in Rudolph Koenig, Catalogue des Appareils d'Acoustique (Paris, 1889): p.36.
ProvenanceStamped numbers like these are found on objects from the Physics Department, Harvard.