Fig. 3 is a longitudinal vertical section of the same;
Fig. 3.
Fig. 4 is an enlarged plan illustrating the screen and hinged covers, one being opened and one closed; and
Fig. 4.
Fig. 5 is a detail of the hub, stems and part of one paddle.
Fig. 5.
The apparatus is constructed in the form of a rectangular trough-like structure, with its sides and ends, A, substantially water-tight by means of the double walls, a a. The upper portion of the interior is occupied by the swinging wash-box, B, semicircular in shape, with flat sides and rounded bottom throughout, the bottom being perforated.