a town of Italy, in the duchy of Mantua, capital of a territory of the same name, and subject to the house of Austria. E. L. 10. 25. N. L. 45. 9.

B QUADRO, Quadrato, or Durale, in music, called by the French b quarré, from its figure. This is what we call B natural or sharp, in distinction to B mol or flat. See Flat and Sharp.

If the flat be placed before a note in the thorough bass, it intimates, that its third is to be minor; and if placed with any cipher over a note in the bass, as 6, or 5, &c., it denotes, that the fifth or sixth thereto are to be flat. But if the quadro be placed over any note, or with a cipher, in the thorough bass, it has the contrary effect; for thereby the note or interval thereof is raised to its natural order.