Tide Table for the Dutch West Coast; Tidal Rose; indicating the currents of the tide on the West Coast of the Netherlands. The fixed outer circle indicates the hours. In it moves a turntable; divided into twelve sections for the hours; and with four concentric circles for the coastal strips of Holland; Goeree and Maas; Brouwershaven and finally Walcheren. The currents are obtained by first calculating high water at Texel; then setting the arrow on the turntable to the time found; after which one can read the directions of the currents and the high and low water times for the other places.; Samuel Lankhout (mentioned on object); 1870; cardboard; brass (alloy); yarn; h 28.4 cm x w 20.9 cm x d 1.5 cm