.ZEO'LIAN HARP, a musical instrument, the sounds of which are drawn from it by a current of air acting on the strings. One may be constructed as follows :—Let a box be made of thin deal, of a length exactly answer ing to the window in which it is intended to be placed, four or five inches in depth, and five or six in width. Glue on it, at the extre mities of the top, two pieces of oak, about half an inch high and a quarter of an inch thick, to serve as bridges for the strings ; and withinside, at each end, glue two pieces of beech about an inch square, and of length equal to the width of the box which is to hold the pegs. Into one of these bridges fix as many pegs, such as are used in a pianoforte, though not so large, as there are to be strings ; and into the other, fasten as many small brass pins, to which attach one end of the strings. Then string the instrument with small catgut, or first fiddle-strings, fixing one end of them, and twisting the other round the opposite peg.
These strings, which should not be drawn tight, must be tuned in unison. To procure a proper passage for the wind, a thin board, supported by four pegs, is placed over the strings, at about three inches distance from the sounding-board. The instrument must be exposed to the wind at a window partly open ; and to increase the force of the current of air, either the door of the room, or an op posite window, should be opened. When the wind blows, the strings begin to sound in unison : but as the force of the current in creases, the sound changes into a pleasing admixture of all the notes of the diatonic scale, ascending and descending, and these often unite in the most delightful harmonic combinations.