Tuning 



-*n Stopper 



SwellRod 

 actuating 

 Louvres 



Great Organ ( 

 Sound { 

 Board I 



Wind Trunk Op 

 Heavy Pres- 

 sure yet 'lows 



Blow off 

 Sound Board 



Pedal Sound Board 

 Swell Reservoir^ 



Pneumatics 

 actuating Swell 

 Sound Board 

 Pallets 



Swell Sup.octSiide 

 Swell Sub. oct.Slide 



Great to Pedal & 

 Swell to Pedal 



Couplers 

 Balance Swell 



Compostt/on 

 TedaJ 



Pedai, 

 Pulsing 

 Chest 



Section of two-manual organ blown by hand. The part known as the great organ, seen to the right, is actuated by 

 trackers or wires connecting direct with the pipes; in the swell organ, seen on the left, the keys communicate pneu- 

 matically with the pipes 



ORGAN: SECTIONAL DIAGRAM ILLUSTRATING THE MECHANISM OF A CHURCH ORGAN 



II 7 



