A short 1876 article describing H. Fischer's apparatus of Hanover for recovering potash from the suint (grease) of raw wool. Four vats on a rotating frame with a hand crank pass the wash water successively over batches of wool to produce a concentrated lye with little labor. The article gives the step-by-step operating cycle and yield figures from Maumené, Fuchs and the Döhren wool-washing works, and lists European potash-from-grease works.