165 pages , chapters include Chests and Valves, Choice of Chorus Timbre, Tonal Characteristics as They Developed in Various countries, Schnitger and Silbermann Organs, French Baroque and Modern Organs, Comments on the English System, Holland, and Parts II, A Minimum All-Purpose American Organ, with six chapters and Part III How to Tell a Good Organ From a Poor One with six chapters. Charts with pipe sizes.