a seaport-town of the Sardinian dominions, on an inlet of the Gulf of Genoa, in the division and 50 miles E.S.E. of Genoa. It has a fine situation, and is generally well built, defended by a castle, and enclosed by walls. There is here a spacious and handsome public square, numerous churches, a town-hall, convent, hospital, and schools. The Gulf of Spezia forms a very fine harbour; it is the same that was called by the ancients Portus Lune. Pop. 9796.

**SPHERE** is a solid, formed by the revolution of a semi-circle about its diameter.