present day are almost invariably altered six-stringed ones, on which the neck has been narrowed, and the head shortened, so that the instrument may be used as a small violoncello. This one was originally made with only four strings, and has evidently never been tampered with. Viola d'amore; Italian, seventeenth century. A fine specimen, in a well-preserved condition. Viola d'amore; Italian, seventeenth century. Old-fashioned shape, having several incurvations at the sides, and a sound-hole with a rose in the middle of the belly. Seven catgut-strings, and underneath them seven sympathetic strings of thin steel-wire. Viola d'amore; German, eighteenth century. Probably made by Jacob Rauch, in Mannheim, about 1740. With only five catgut-strings, and with eight sympathetic wire-strings. An English viola d'amore strung entirely with wire, seventeenth century; with a curiously-constructed head, ornamented with a carved female bust. A so-called psaltery (also known as sultana and cither-viol). Mounted with six wire-strings, and played with a bow. Irish; eighteenth century. Made by Thomas Perry, in Dublin, anno 1767. A psaltery, made by Thomas Perry, in Dublin, second half of eighteenth century. The neck and the tail-piece are of ivory. Its ten strings are of steel and brass wire, the highest eight being arranged in four pairs producing four tones, and the others are single ones producing two tones. Hardangerfelen. A kind of viola d'amore of the Hardanger peasants in Norway, inlaid with mother-of-pearl and ivory. The top, carved and gilt, represents a dragon's head. This fiddle has four catgut-strings, and four thin steel-strings beneath them. Inside is the inscription "Fabrokert of Knudt Erikson, Helland, 1872." It was sent to me from Christiania. Violins of unusual shapes, three curious specimens, made during the eighteenth century. A violin made of iron. Probably English, beginning of the present century. If on no other account, this violin is certainly interesting in an acoustic point of view, since it proves that much sound is obtainable merely by the vibration of the strings acting upon the column of air in the violin, without any assisting vibration of the belly or sound-board. At all events, the substance of which this violin is made is not likely to contribute to the sonorousness. A tromba marina or marine trumpet, probably Dutch, seventeenth century. Besides one string of thick catgut upon the instrument, there are in the inside forty-one sympathetic strings of thin steel-wire. A nyckel-harpa, a curious instrument of the Swedish peasantry, which may be briefly described as a combination of a fiddle and a hurdy-gurdy. A crwth, an antiquated Welsh instrument of the fiddle class. The body is cut out of a single block of wood, the belly only being glued to it. Two specimens of the nail-violin, one of which has sympathetic strings of thin brass-wire running over the sound-board. These two curious instruments