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. Long. 10° 25'. N. Lat. 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 $b$ be placed before a note in the thorough bass, it intimates, that its third is to be minor; and if placed with any cypher over a note in the bass, as $b$ 6, or $b$ 5, &c., it denotes, that the fifth or sixth thereto are to be flat. But if the quadro $q$ be placed over any note, or with a cypher, in the thorough bass, it has the contrary effect; for thereby the note or interval thereto is raised to its natural order.