The industry is chiefly developed in Lombardy, Piedmont and Liguria; to some extent also in Campania, Venetia and Tuscany, and to a less extent in Lazio (Rome), Apulia, Emilia, the Marches, Umbria, the Abruzzi and Sicily.
The beetroot-sugar industry has attained considerable proportions in Umbria, the Marches, Lazio, Venetia and Piedmont since 1890.
Emilia gives a maximum rate of 10.48 per ioo,ooo, while that of Liguria and Lazio is little lower.
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The modern province of Rome (forming the compartimento of Lazio) includes also considerable mountain districts, extending as far N.W.