(Celestes)—Percussion Stops—the Diaphone

CHAPTER XI

Tuning—Equal Temperament—New Method of Tuning Reeds

CHAPTER XII

Progress of the Revolution in Our Own Country

CHAPTER XIII

Chief Actors—Barker—Cavaillé-Coll—Willis—Hope-Jones

CHAPTER XIV

How We Stand To-day—Automatic Players—Specifications of Notable Organs: St. George's Hall, Liverpool; Notre Dame, Paris; St. Paul's Cathedral, London; Westminster Abbey; Balruddery, Scotland; Worcester Cathedral; Yale University, U. S. A.; St. Paul's Cathedral, Buffalo; Paris Theatre, Denver; Cathedral of St. John the Divine, New York; University of Toronto, Canada; City Hall, Portland, Me.; Liverpool Cathedral, England

INDEX TO ILLUSTRATIONS

The Organ in St. George's Hall, Liverpool, Eng. . . . Frontispiece
Prehistoric Double Flutes
The Wind-chest; Front View.
The Wind-chest; Side View.
The Pneumatic Lever
Nomenclature of Organ Keyboard
Portrait of Moitessier
Tubular Pneumatic Action
The First Electric Organ Ever Built
The Electro-Pneumatic Lever
Valve and Valve Seat, Hope-Jones Electric Action
Portrait of Dr. Péschard
Console, St. Paul's Cathedral, Buffalo
Console on Bennett System
Console, Trinity Church, Boston
Console, College of City of New York
Principle of the Sound Trap
Sound Trap Joint
The Vacuum Shutter
Series of Harmonics
Estey's Open Bass Pipes
Diapason Pipe with Leathered Lip
Haskell's Clarinet without Reed
Diagram of Reed Pipe
Vowel Cavities
Diaphone in Worcester Cathedral
Diaphone in Aberdeen University
Diaphone in St. Patrick's, N. Y.
Diaphone in Auditorium, Ocean Grove, N. J.
Diaphone in St. Paul's Cathedral, Buffalo
Diaphone Producing Foundation Tone.
New Method of Tuning Reeds
Portrait of Aristide Cavaillé-Coll
Portrait of Charles Spachman Barker
Portrait of Henry Willis