The earth and its inhabitants The earth and its inhabitants .. earthitsinhabita386recl Year: 1883 464 THE NETHERLANDS. In many localities nature aids the work of man. Marine alluvium is deposited upon the banks, or wadden, which separate Friesland from its fringe of islands. After a time they rise above the water, and thousands of birds resort to them, to feed on the molluscs left behind by the retiring tide. It is only, however, after marsh plants and grasses have taken root upon these shining mud-flats, or bliken, that Fig. 259.—ÏJIE ZriDERPoiDEu foumeuly. Scale 1 : 76,œ0. 4-'5P'
The earth and its inhabitants The earth and its inhabitants .. earthitsinhabita386recl Year: 1883 464 THE NETHERLANDS. In many localities nature aids the work of man. Marine alluvium is deposited upon the banks, or wadden, which separate Friesland from its fringe of islands. After a time they rise above the water, and thousands of birds resort to them, to feed on the molluscs left behind by the retiring tide. It is only, however, after marsh plants and grasses have taken root upon these shining mud-flats, or bliken, that Fig. 259.—ÏJIE ZriDERPoiDEu foumeuly. Scale 1 : 76,œ0. 4-'5P' Gr 4°55; 1 :Mile they are considered ' ripe ' for embankment. AVhen they reach that stage they arc known as schorron, or kiveldcr, and, if dj'ked off, they yield magnificent crops for forty years in succession, without requiring manure. The main dykes, constructed as a defence against the sea, are works of a most formidable nature. The enormous outer piles are tied by planks to an inner row of
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