Stock Photo - 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 × w 20.9 cm × d 1.5 cm