Chestnut Hill Presbyterian Church, Philadelphia, PA
Mander Organs (2000)

Great:
16' Double Diapason
8' Open Diapason
8' Stopped Diapason
8' Viola da Gamba
8' Harmonic Flute
4' Principal
4' Open Flute
2 2/3' Twelfth
2' Fifteenth
1 1/3' Fourniture IV-V
8' Mounted Cornet V
8' Trumpet
4' Clarion
Tremulant

Swell:
8' Open Diapason
8' Hohl Flute
8' Salicional
8' Celeste (from Diapason)
4' Principal
4' Nason Flute
2' Piccolo
2' Fifteenth
2 2/3' Sesquialtera II
1 1/3' Plein Jeu III-IV
16' Bassoon
8' Trumpet
8' Hautbois
8' Vox Humana
Tremulant

Choir:
8' Chimney Flute
8' Quintadena
4' Principal
4' Block Flute
2 2/3' Nazard
2' Fifteenth
2' Recorder
1 3/5' Tierce
8' Peake Trumpet (also playable from Gt.)

Pedal:
16' Open Diapason
16' Bourdon
10 2/3' Quint
8' Principal
8' Bass Flute
4' Octave
2 2/3' Mixture IV
16' Trombone
1' Mixture III-IV
8' Trumpet
8' Cromorne
Tremulant

The Swell Open Diapason doubles as a Celeste by means of a second slider feeding air through 
adjustable valves to restrict the flow of wind. It is \"tuned\" flat by adjusting the amount of wind 
getting to the pipes from the second slider.

Due to height restrictions, the Pedal Open Diapason bottom notes combine the Bourdon 16' with softly 
speaking 8' Open Diapason pipes, which fill in the harmonics missing from a stopped pipe. Snetzler 
did this in the UK centuries ago for manual Open Diapasons on chamber organs.

 [Received from Connor Annable 2012-01-06.]