is constructed to crush about four tons of
seed per day of eleven hours, and the manual labor has been so reduced
to a minimum that it is intended to be worked by one man, who moulds
and puts the twenty-four cakes into the presses, and while they are
under pressure is engaged paring the cakes that have been previously
pressed. In crushing castor-oil seed, a decorticating machine or
separator can be combined with the mill, but in such a case the engine
and boiler would require to be made larger.--_The Engineer_.

[Illustration: AN ENGLISH ADAPTATION OF THE AMERICAN OIL MILL.]

* * * * *

APPARATUS FOR SEPARATING SUBSTANCES CONTAINED IN THE WASTE WATERS OF
PAPER MILLS, ETC.

For extracting such useful materials as are contained in the waste
waters of paper mills, cloth manufactories, etc., and, at the same
time, for purifying such waters, Mr. Schuricht, of Siebenlehn, employs
a sort of filter like that shown in the annexed Figs. 1 and 2, and
underneath which he effects a vacuum.

[Illustration: SCHURICHTS FILTERING APPARATUS. Fig. 1.]

The apparatus, A, is divided into two compartments, which are
separated by a longitudinal partition. Above the stationary bottom, a,
there is arranged a lattice-work grating or a strong wire cloth, b,
upon which rests the filtering material, c, properly so called. The
reservoir is divided transversely by several partitions, d, of
different heights. The liquor entering through the leader, f,
traverses the apparatus slowly, as a consequence of the somewhat wide
section of the layer. But, in order that it may traverse the filtering
material, it is necessary that, in addition to this horizontal motion,
it shall have a downward one. As far as to the top of the partitions,
d, there form in front of the latter certain layers which do not
participate in the horizontal motion, but which can only move
downward, as a consequence of the permeability of the bottom. It
results from this that the heaviest solid particles deposit in the
first compartment, while the others run over the first partition, d,
and fall into one of the succeeding compartments, according to their
degree of fineness, while the clarified water makes its exit through
the spout, g. When the filtering layer, c, has become gradually
impermeable, the cock, i, of a jet apparatus, k, is opened, in order
to suck out the clarified water through the pipe, r.--_Dingler's
Polytech. Journ., after Bu