Keyboard, especially on a photoplayer or pipe organ.

Hollow gourd or wood rattle containing small pebbles or seeds; used as a percussion effect. Certain Decap organs include an exceptionally loud maraca made of hard fibre tubing and steel ball bearings.

Large scale xylophone with thin, wide bars and tuned tubular resonators, producing a sound much mellower and more sustained than that of the xylophone. The marimba used in a few Nelson-Wiggen 5X orchestrions and the similar marimbaphone, as it was called in certain Link coin pianos, play an octave lower than the usual xylophone.

See veneer.

Roll used on a perforator to control the punches for making production rolls. Sometimes the master roll is several times the length of the final production roll in order to provide greater accuracy and easier synchronization with the reader or sensing mechanism.