mechanical action
71Pedal harp — Harp Classification String instrument (plucked) Playing range …
72Organ (music) — Organ 1741 Pipe organ in Église Saint Thomas, Strasbourg, France. Classification Keyboard instrument (Aerophone) Playing r …
73List of pipe organs — This is a list and brief description of notable pipe organs in the world, with links to corresponding articles that exist. See also: Historic Organs*It is generally agreed upon that the world s oldest playable pipe organ is located in the… …
74Bartolomeo Cristofori — Photo of a 1726 portrait of Bartolomeo Cristofori. The original was lost in the Second World War. Bartolomeo Cristofori di Francesco (May 4, 1655 – January 27, 1731) was an Italian maker of musical instruments, generally regarded as the inventor… …
75Flow measurement — is the quantification of bulk fluid movement. Flow can be measured in a variety of ways. Positive displacement flow meters acumulate a fixed volume of fluid and then count the number of times the volume is filled to measure flow. Other flow… …
76Buildings of Iowa State University — This is a list of notable buildings and landmarks at Iowa State University, as well as persons associated with such structures.AAdministrative Services BuildingAgriculture Hall See Catt Hall or Curtiss Hall Agronomy HallDepartments in Agronomy… …
77Motive power — For other uses, see Motive power (disambiguation). A young drawer pulling a coal tub up a mine shaft, whose effect constitutes the elevation of a weight to a certain height (Sadi Carnot). In thermodynamics, motive power is an agency, as water or… …
78Diaphragm pump — schematic. A diaphragm pump is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable non return check valves to pump a fluid. Sometimes this type of pump is… …
79Rieger Orgelbau — is an Austrian firm of organ builders, known generally as Rieger. The firm was founded by Franz Rieger. From 1873 it was known as Rieger Söhne, and from 1879 as Gebrüder Rieger, after his sons took over. At the end of World War II, the firm was… …
80organ — /awr geuhn/, n. 1. Also called pipe organ. a musical instrument consisting of one or more sets of pipes sounded by means of compressed air, played by means of one or more keyboards, and capable of producing a wide range of musical effects. 2. any …
