... the bottom of the inner vessel, to act as a filter. As long as the liquor passes through turbid, it is pumped back into the receiver; whenever it runs clear, the receiver is covered with another piece of cloth to exclude the dust, and allowed to drain at its leisure. Next morning the drained magma is put into a strong bag, and squeezed in a press. The indigo is then carefully taken out of the bag, and cut with a brass wire into bits, about three inches cube, which are dried in an airy house, upon shelves of wicker work. During the ... — The Commercial Products of the Vegetable Kingdom • P. L. Simmonds
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