APRIL 16.] THE NEW ZEALAND GAZETTE. 1207

treatment. It is also liable to impairment from sudden
changes in temperature. The severity of these conditions
varies with different kinds of material, being the greatest
when the proportion of sulphur is high. With a low content
of sulphur the temperature generated during the operation
and the temperature of the resulting gases does not rise
very high, and a grate of cast iron or of perforated wrought
iron plate will suffice. Where higher temperatures are
generated perforated copper plates have been used to advan-
tage, and also perforated asbestos board. Use may be made
also of grates formed of bars or plates of refractory earth
material, bricks, fireclay, porcelain, or the like. Water-
cooled pipes or grate-bars may be used, &c., &c.

[NOTE.—The above extract from the specification is inserted in place
of the claims.]

(Specification, £1 15s. 6d.; drawing, 2s.)

No. 24088.—29th February, 1908.—CARL GUSTAF PATRIK
DE LAVAL, of Kungstradgardsgatan 2 C, Stockholm, Sweden,
Doctor of Philosophy. New or improved method of extract-
ing iron, and apparatus therefor.

Claims.—(1.) The described method of extracting iron from
a pulverised charge according to which such pulverised
charge is introduced in a continuous manner into the upper
part of a vertical shaft which is heated from the outside,
and in which by means of rotating vanes or the like the charge
is thrown in a thin layer towards the heated wall of the
shaft. (2.) Apparatus for extracting iron from a pulverised
charge comprising a vertical shaft heated from the outside, a
central supply-pipe for the charge opening into the upper
part of such shaft, and a rotary shaft extending through such
pipe furnished with vanes that extend nearly to the wall of
the shaft. (3.) Apparatus for carrying out the method of
extracting iron set forth in claim 1, constructed, arranged,
and operating substantially as described with reference to
and shown in the drawing.

(Specification, 2s. 6d.; drawing, 1s.)

No. 24094.—30th May, 1907.—DANIEL ROBERT DOS-
SETOR, of 99 Queen Street, Melbourne, Victoria, Australia,
Architect. An improved structure for use in playing bil-
liards.

[NOTE.—This is an application under section 106 of the Act, the date
given being the official date of the application in the Commonwealth of
Australia.]

Claims.—(1.) A billiard-table having eight sides and an
opening in the middle of each corner-side to permit a ball to
pass to a pocket, as set forth. (2.) A table for playing bil-
liards, which consists of a plane surface the corners of which
are cut off by a rail or corner-side in which is an opening
directly in line with the corner of the table to admit a ball
into the pocket, as set forth. (3.) A table for playing billiards,
the corners of which are partitioned off by means of a
cushioned rail placed athwart the corners, said rail having
an opening leading into a stepped enclosure constituting a
pocket, as specified and shown. (4.) In a billiard-table, a
cushion formed by a rope of rubber one-half of which is firmly
imbedded in the table-edge, while the other half projects to
receive the impact of a ball, as described.

(Specification, 3s. 6d.; drawing, 1s.)

No. 24095.—5th March, 1908.—THE AMERICAN BOX BALL
COMPANY, a corporation organized under the laws of the
State of Indiana, and doing business at the corner of Draper
and Van Buren Streets, Indianapolis, Marion, Indiana,
United States of America, Manufacturers (the assignees of
Daniel H. Talbert, of No. 3030 Kenwood Avenue, Indiana-
polis aforesaid, Inventor). Improvements in game apparatus.

Claims.—(1.) A game apparatus of the kind described, in-
cluding an alley over which balls may be rolled, swinging-
members for the balls to strike that are pivotally mounted
over said alley and above their centres of gravity, whereby
they will be maintained in a vertical position, and means for
holding said swinging-members in an elevated position after
the same have been struck by a ball. (2.) In connection
with claim 1, a catch for normally maintaining said holding-
means in a relaxed position before the swinging-members
have been struck, and means on said members for engaging
and releasing said catch as the swinging-member moves to
an elevated position after it has been struck. (3.) In con-
nection with claim 1, spring-drawn means for holding said
members in an elevated position after they have been struck,
and means for relaxing said holding-means to enable the
swinging-members to return to their normal positions. (4.) In
connection with claim 3, means operable from the forward
end of the apparatus for moving said catches in their engaging-
positions.

(Specification, 6s. 3d.; drawing, 3s.)

No. 24097.—5th March, 1908.—ROBERT THORN HAINES,
of “Glen Etta,” 5 Union Street, Windsor, Victoria, Aus-
tralia, Scientific Expert. Improvements in washing-ma-
chines.

Claims.—In a washing-apparatus, the construction and
arrangement of parts substantially as described and shown
in the drawings. (2.) In a washing-apparatus of the cha-
racter described, the arrangement of channels, covers, or
guards, such as 8, on the outer surface of the steam-chamber
for increasing the circulation through said chamber, and for
preventing the clothes from closing the circulation-apertures
in the walls of said chamber, substantially as described.

(Specification, 3s. 6d.; drawing, 2s.)

No. 24098.—5th March, 1908.—GEORGE RIDGWAY, of the
Great Boulder Proprietary Gold-mining Company, Kalgoorlie,
Western Australia, Mining Engineer. Improvements in
filtering-machines.

Claims.—(1.) In improvements in filtering-machines, annu-
lar trough or troughs fitted with agitator-gear, a drying-
space and dumping-hopper, a set of rollers radially arranged
on said trough, an annular framework carried on said rollers
and operated by worm or other gear, guiding track or tracks
attached to said trough, quadrants attached to said revolving
framework with vertical action, chains or ropes attached
to said quadrants and carried on the peripheries of their
arcs, spindles arranged on said revolving framework having
grooved wheels connected with said quadrant-chains, also
grooved wheels from which filtering-frames are suspended,
filtering-frames having caps or covers with slots or openings
contiguous to the filtering-surfaces; a central chamber with
three compartments, pipes and hose-connections from said
central chamber to the filtering-frames, valves in said pipes,
and tracks or plates or rollers actuating same; spraying-
pipes arranged to spray the filtering-surfaces; the whole
comprising a pulp filtering-machine for automatically carrying,
raising, and lowering the filtering-frames, filtering, washing,
and drying the pulp, and dumping the residues, as described
and illustrated in the drawings. (2.) In improvements in
filtering-machines, an annular trough or troughs divided into
compartments and fitted with agitating-appliances, an annular
carriage carried on rollers above said annular trough, and
arranged to revolve concentrically above same; filtering-
frames adjustably suspended in the said annular carriage;
chain and axle gear actuated by a guiding-track as means
of raising and lowering the said filtering-frames out of and
into the said annular trough while being carried round by the
said annular carriage; a central column or chamber divided
into compartments separately connected to the said filtering-
frames; valves and tracks for actuating same, automatically
opening and closing connection between said filtering-frames
and central column or chamber; a cap or cover on said
filtering-frames arranged to distribute water over the filtering-
surfaces; perforated pipes arranged to spray the filtering-
surfaces, as described and illustrated in the drawings. (3.) In
improvements in filtering-machines, an annular trough or
tank divided by a partition into compartments and fitted with
agitating appliances; an annular carriage carried on flanged
or grooved rollers above said annular trough; concentric
rails fitted to carriage running on said flanged or grooved
rollers; worm or tooth gear as means of revolving the annu-
lar carriage concentrically above said annular trough; filter-
ing-frames adjustably suspended in said annular carriage;
chain axle and quadrant gear actuated by rollers and guiding-
track as means of raising and lowering said filtering-frames
out of and into said annular trough while being carried round
by the said carriage; a central column or chamber divided
into compartments for compressed air, water-supply, and
vacuum; packing-boxes and glands on stationary parts
and pipes, permitting the central column to revolve with the
carriage; pipe, hose, and valve connections from separate
chambers in said column to the filtering-frames; tracks or
rollers for actuating the said valves automatically opening
and closing connections between the filtering-frames and the
central column; a cap or cover on filtering-frames arranged
to distribute water over the filtering-surfaces; perforated