VIOLA D'AMORE, an instrument no longer in use, but of such the tone and effect are said to have been very sweet and singular. It was played with a bow, and seems to have varied in the number of its strings and in its tuning. One species of it is described as having five gut strings, and five metal wires tuned in unison with the strings, but passing under the finger-board and bridge, and thus vibrating only as open wires, to arpeggios or harmonics, &c., played upon the open gut strings. The principle of this instrument seems to have been revived in the construction of some recent musical instruments.