Continuous embankments begin at Cremona, and they extend not only along both banks of the Po, but also along the lower course of its tributaries. The main dykes have a length of nearly 650 miles. In addition to these there are smaller dykes traversing the space between these _froldi_, or main dykes, in all directions, and enclosing willow plantations, fields, and even vineyards. In fact, the river extends to the foot of the main dykes only in a few localities. It is ordinarily only 650 to 1,600 feet wide, whilst the dykes are several miles apart, to allow the river to spread during the inundations. The land thus lying within the dykes has been divided by the villagers into _golene_, and is protected by smaller dykes against ordinary floods. The rules laid down for the construction of embankments have been drawn up in the general interest, and are sufficiently precise, but they are not always observed. The old system, embodied in the dreadful proverb, “Vita mia, morte tua,” is not yet quite extinct. Formerly the peasants were in the habit of {211} crossing over to the other bank, and deliberately cutting through the embankments there, thus saving their own crops by ruining their neighbours’. [Illustration: Fig. 69.—THE PO BETWEEN PIACENZA AND CREMONA. From the Austrian Staff Map. Scale 1 : 325,000.] The width of the bed of inundation enclosed between these embankments grows less in proportion as we descend the river, and in the case of the arms of the delta does not exceed 900 to 1,600 feet. This is not sufficient to enable the waters to escape during extraordinary floods, when they sometimes rise 25 and even 30 feet. Besides, it frequently happens that the villagers fail to keep the embankments in thorough repair, and sometimes entire districts are ruined because the mole-tracks were not stopped up. A breach in the embankment, unless quickly filled up, produces untold misery. The crops are destroyed, the villages levelled with the ground, the soil is torn up and carried off, and the inhabitants are swept away by famine and its fearful attendant, typhus fever. These great floods of the Po and the earthquakes of Calabria are the two plagues of Italy. In 1872 1,200 square miles between the Secchia and the sea were converted into a lake. Two years afterwards there still remained pools of water.