drawing; and the music sheet from left to right over the tracker the diaphragm pneumatics. The entrance of the air under the heavy duty that is required of them, the to these boxes is controlled by two valves, IP and Vs, board. In the normal condition, that is, before the leathers, because of their… … This instrument can be played by hand or by the music roll. Here shown with the pedals drawn out ready for use with the piano large diaphragm power pneu- or upper half of the register player. Note the control levers below keyboard. matic, or striking pneumatic, with greater emphasis, and Fig.…
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![An illustration from [Catalog]. (1908)](https://img.insideoutlibrary.com/img/200/ia-catalog00macy-313-932.webp)
