GLOCKENSPIEL, or ORCHESTRAL BELLS, an instrument of percussion of definite musical pitch, used in the orchestra, and made in two or three different styles. The oldest form of spiel consisted of a set of bells of graduated size mounted mid-fashion on a frame and played by one performer by means of steel hammers. The lyre-shaped glockenspiel, or steel harmonica (Stahlharmonika), is a newer model, which has instead of bells 12 or more bars of steel, graduating in size according to their pitch. These bars are fastened horizontally across two bars of steel set perpendicularly in a steel frame. Wagner has used the glockenspiel with quisite effect in the fire scene of the last act of Die Walkure and in the peasants' waltz in the last scene of Die Meistersinger. When chords are written for the enspiel, as in Mozart's Magic Flute, the keyed harmonica is used. It consists of a keyboard having a little hammer attached to each key, which strikes a bar of glass or steel when the key is depressed. GLOGAU, a town in the Prussian province of Silesia, 59 m. N.W. from Breslau by rail. Pop. 28,206. Early in the filth century it withstood a siege by the emperor Henry V. ; and in 1157 it was set on fire. In 1252 the town, restored by Henry I., became the capital of a principality of Glogau, and in 1482 town and district were united to the Bohemian crown. During the Thirty Years' War Glogau suffered greatly. In 1741 the Prussians took it by storm and utilized it as a base during the Seven Years' War. After the battle of Jena (18o6) it fell to the French; and was held against Russian and Prussian besiegers after the battle of Katzbach in 1813, for many months. Glogau is built partly on an island and partly on the left bank of the Oder. The cathedral, in the Gothic, and a castle (now used as a courthouse), in the Renaissance style, are notable. Glogau carries on extensive trade by river and rail. Industries include iron founding, machin ery-building, tobacco, starch and sugar. It has also lithographic works and its book trade is celebrated.