ORCHESTRION, a musical instrument invented by the Abbé Vogler about 1789. It was a kind of portable organ, about 9 feet in height, breadth, and depth. Its power was that of an organ of 16-feet pipe, and it had a mechanism to swell or to diminish all the sounds within its compass. Another instrument of the same name, invented in 1796 by Kunz, a Bohemian, consisted of a pianoforte combined with some organ-stops. (G. F. G.)