The manuals are arranged in steps, each slightly overhanging that below. Taken in order from the top, they are:—(1.) Echo organ , of stops of small scale and very soft tone, enclosed in a "swell-box." (2.) Solo organ , of stops imitating orchestral instruments. The wonderful "vox humana" stop also belongs to this manual. (3.) Swell organ , contained in a swell-box, the front and sides of which have shutters which can be opened and closed by the pressure of the foot on a lever, so as to regulate the amount of sound proceeding from the pipes inside. (4.)
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HOW IT WORKS.
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