On Wikipedia	https://en.wikipedia.org/wiki/Pump_organ#Harmoniums_(pressure_system_free-reed_organs)
Parent instrument	Organ

Pieces

Title	Subname	Composer	Catalogue	Key	Year	Type
Hymn of the Child on Awakening		Franz Liszt	S. 19		1843	Hymn
An den heiligen Franziskus von Paula		Franz Liszt	S. 28	E Major	1860	Religious work
Ave Maria		Charles Gounod			1853
Bagatelles		Antonín Dvořák	Op. 47		1878
Herzgewächse		Arnold Schoenberg	Op. 20	Atonal	1911	Song(s)
Weihnachtsmusik		Arnold Schoenberg			1921
Johann Strauß : Rosen aus dem Süden		Arnold Schoenberg			1921
Johann Strauß: Lagunenwalzer		Arnold Schoenberg			1921	Waltz
Max Reger : Eine romantische Suite		Arnold Schoenberg			1920	Suite
Messe des pêcheurs de Villerville		Gabriel Fauré			1881	Mass
3 Morceaux		Camille Saint-Saëns	Op. 1		1852
6 Duos		Camille Saint-Saëns	Op. 8		1858	Duet
Romance		Camille Saint-Saëns	Op. 27		1866	Romance
Wedding Prelude		Richard Strauss	TrV 247	B-flat Major	1924	Prelude
Barcarolle		Camille Saint-Saëns	Op. 108	F Major	1898	Barcarolle
Four Variations and a Fughetta on the Russian Folksong		Nicolai Rimsky-Korsakov	Op. 14		1874	Variations
The Assassination of the Duke of Guise		Camille Saint-Saëns	Op. 128		1908	Film score
Motet pour la fête de l'exaltation de la Sainte Croix		Charles Gounod			1871	Motet
Sérénade		Charles Gounod			1855	Serenade
Oh! that we two are maying		Charles Gounod			1871
The sea hath its pearls		Charles Gounod			1871
When the children pray		Charles Gounod				Song(s)
Rustic serenade to the virgin on the theme of the Roman pifferari		Hector Berlioz	H 98	E-flat Major	1844	Serenade
Toccata		Hector Berlioz	H 99	C Major	1844	Toccata
Hymn for the Elevation		Hector Berlioz	H 100	D Major	1844	Hymn
Requiem		Giacomo Puccini				Requiem
Little solemn mass		Gioachino Rossini			1863	Mass
3 Esquisses musicales		Georges Bizet	WD 50
Quatre pièces		Florent Schmitt			1901
Sainte Marie-Madeleine		Vincent D'Indy	Op. 23		1885	Cantata
Les noces d'or du sacerdoce		Vincent D'Indy	Op. 46		1898	Canticle
Ave Maria II		Franz Liszt	S. 667c	D Major	1869	Ave Maria
Ave maris stella		Franz Liszt	S. 668a		1871
Angelus! Prière aux anges gardiens		Franz Liszt	S. 672c		1882
14 Keyboard pieces		Max Reger	rwv anhang e i-3			Lieder