When full, it is taken up by its handles, rested on the rim of
the filter, and its contents emptied therein.
_General Manipulation of the Press_.--Supposing the filter in the
position shown in Figs. 3 and 4, at the moment the seedcake is about to
drop out: the operator takes hold of the lock lever, N, with his left
hand, raises the bottom, K, to a horizontal position, and at the same
time fastens the bolt of the lever by turning it. He then seizes the
lever, M, with his right hand, and turns it so as to close the filter,
having care at the same time to support the extremity, r, of the bottom
with his left hand so that the catch, r', may pass under it when the
lever is manipulated. The bottom haircloth is then put in place, the
charge is thrown in, and its surface leveled, and the hair-cloth cushion
is laid on top. The filter is then revolved around the column so as to
bring it into the position shown in Fig. 1. The cock of the distributer
that admits water under pressure being turned on, the ram, D, rises,
carries with it the filter, and compresses the material against the
presser, G. At the end of from six to ten minutes the pressure-valve is
closed and the discharge-valve opened.
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