From east to west, and the greatest breadth 1971 m.
The northern portion, measured from the Alps at the Monte Viso to the mouth of the Po, has a breadth of about 270 m., while the maximum breadth, from the Rocca Chiardonnet near Susa to a peak in the valley of the Isonzo, is 354 m.
In breadth, while it does not generally measure more than 100 m.
The narrower term "orchestration" is applied to the instrumentation of orchestral music. Since the most obvious differences of timbre are in those of various instruments, the art which blends and contrasts timbre is most easily discussed as the treatment of instruments; but we must use this term with philosophic breadth and allow it to include voices.
The Apennines (q.v.), as has been already mentioned, here traverse the whole breadth of Italy, cutting off the peninsula properly so termed from the broader mass of Northern Italy by a continuous barrier of considerable breadth, though of far inferior elevation to that of the Alps The Ligurian Apennines may be considered as taking their rise in the neighborhood of Savona, where a pass of very moderate elevation connects them with the Maritime Alps, of which they are in fact only a continuation.