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Wind-driven drainage mill
A mill in its simplest form
This mill is of a type known locally as a ‘tjasker’. Specifically, it is a ‘boktjasker’ (‘trestle tjasker’), as the shaft is supported by a trestle. The ‘tjasker’ is a windmill in its simplest form. The
sails are connected directly to the shaft, which means no additional mechanism is needed to convert wind power into pumping power. The shaft is attached to the Archimedean screw inside the barrel. This raises the
water, after which it runs down the wooden gully into the circular ditch. Until the 1940s dozens of ‘tjaskers’ kept the marshy pasture land of Friesland, West Groningen, Drenthe and North-West Overijssel dry. Many
of them were partially dismantled in the winter and brought inside, as at this time of year the land was often flooded. This mill was turned to face the wind by rotating it on the wooden
track. Here the track is a quarter circle, but originally it would have been a complete circle.
Relocated here in 1928