BOOK VIII

305

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A—UpperD—Strakesin THE SILL.

CROSS LAUNDER. B—SMALL LAUNDERS. C—HEADS OF STRAKES.

• E—Lower transverse launder. F—Settling pit. G—Socket

• H—Halved iron rings fixed to beam. I —Pole. K—Its little

scrubber. L —Second small scrubber.