Dec. 20.] THE NEW ZEALAND GAZETTE. 2299

centrally pivoted rocker-bar, the rocker-fork and a roller-
bearing supporting the inner end of the rocker-bar. (9.) In
a sheep-shearing machine, the use of a dust-screen con-
structed of cloth, leather, or other flexible material, secured
by suitable means to the front end of the casing and rocker-
bar. (10.) In a sheep-shearing machine, the construction of
the rocker-fork with adjustable and detachable feet bearing
on the cutter.
(Specification, 5s.; drawings, 1s.)

No. 13202.—27th November, 1900.—ALBERT POTTER, of
Belle Vue Road, Mount Eden, Auckland, New Zealand,
Settler. A compound powder for the extermination of all
destructive insects found frequenting fruit-trees and plants,
without injury to the roots, trees, or plants.

Claim.—A compound or composition powder, consisting of
sand, coal-tar, carbolic acid, and water, compounded and
combined substantially in the manner and in the proportions
specified, and for the purposes described in the specifica-
tion.
(Specification, 2s. 3d.)

No. 13211.—4th December, 1900.—FRANCIS JAMES ODLING,
of No. 3, Queen’s Mansions, Beaconsfield Parade, St. Kilda,
Victoria, Mining Engineer, and WILLIAM JAMIESON, of
Broken Hill Chambers, 31, Queen Street, Melbourne, Vic-
toria, Gentleman. An improved apparatus for the separa-
tion of the magnetically attractable mineral or particles from
pulverised ores.

Claims.—(1.) In an apparatus for the purpose specified,
the combination of a circular stationary electro-magnet as
M¹—M² having poles as m¹, a gun-metal rotating shield
as S, and a table as A having a gyratory motion given it,
said table being provided with pockets as A³, each formed
with an upwardly projecting edge rib as a² and the U-shaped
gap-ribs a¹ connecting with end parts of pocket-ribs, and by
aid of which ribs, the attracted mineral, and capillary
attraction, a bead or web of water is maintained between
table and shield when the ore is fed in a wet state, sub-
stantially as described. (2.) In an apparatus for the purpose
specified, a rotating shield as S, having its operative surface
of a conical section and arranged under an electro-magnet
M¹—M², as in Fig. 6, or of a straight section, and arranged
under an electro-magnet M¹—M², as in Fig. 4, and combined
with a table such as A, substantially as and for the purpose
described. (3.) In an apparatus for the purpose specified, a
table as A, having an annular enclosed chamber as J formed
on its periphery, and the ports as J¹, and pipes as J² leading
inwards radially therefrom, combined with a shield as S, and
with an electro-magnet as M¹—M², the poles of which may be cut
away at one or more positions in its circumference, substan-
tially as described and illustrated. (4.) In an apparatus for
the purpose specified, the combination of the annular ro-
tatable feed-launder as B² and its feed-pipes as marked B and
B¹, with a table as A having a downwardly inclined annular
working-surface, a succession of pockets as A³, gaps as a³,
U-shaped ribs as a¹, and the discharge-pipes A⁴ and A⁵, and
said table having a gyratory motion imparted to it, all
assembled and arranged substantially as described and
illustrated. (5.) In an apparatus for the purpose specified,
a suitably supported screw-rod as F adapted to finally adjust
the gyratory motion of table, substantially as described and
illustrated. (6.) In an apparatus for the purpose specified,
the combination of the spherical-headed adjusting screw-rod
F—f, bed-plate G, the supports E, C²—C³, C⁴, and C⁵, and
the table A—A¹, all substantially as described, and illustrated
in the drawings. (7.) The improved apparatus for the pur-
pose specified, having the several improvements hereinbefore
claimed combined, arranged, and assembled in it, substan-
tially as described, and illustrated in the drawings.
(Specification, 10s.; drawings, 3s.)

No. 13213.—5th December, 1900.—MARCONI’S WIRELESS
TELEGRAPH COMPANY, LIMITED, of 18, Finch Lane, Thread-
needle Street, London, England, (assignees of Guglielmo
Marconi, of 18, Finch Lane, Threadneedle Street, London,
England, Electrician). Improvements in apparatus for wire-
less telegraphy.

Claims.—(1.) A transmitter for electric-wave telegraphy
consisting of a spark-producer having its terminals connected
through a condenser with one circuit of a transformer, the
other circuit being connected to a conductor and to a capa-
city. (2.) In a transmitter for electric-wave telegraphy, the
combination of a transformer one circuit of which is a per-
sistent oscillator and the other a good radiator, and means
for setting up oscillations in the oscillator. (3.) A trans-
mitter for electric-wave telegraphy consisting of a spark-
producer having its terminals connected through a condenser
with one circuit of a transformer, the other circuit being con-
nected to a conductor and to earth, the time-period of elec-
trical oscillations in the two circuits being the same, or
octaves of each other. (4.) In a transmitter for electric-wave
telegraphy, the combination of a transformer one circuit of
which is a persistent oscillator and the other a good radiator,
the time-period of electrical oscillations in the two circuits
being the same, or octaves of each other, and means for setting
up oscillations in the oscillator. (5.) A system of electric-
wave telegraphy in which both the transmitter and the
receiver contain a transformer, the time-period of electrical
oscillations in the four circuits of the two transformers being
the same, or octaves of each other. (6.) A system of electrical-
wave telegraphy in which both the transmitter and the
receiver contain a transformer, one circuit of which is a per-
sistent oscillator and the other a good radiator or absorber of
electrical oscillations, all four circuits having the same time-
period, or being octaves of each other. (7.) In a transmitter
for electric-wave telegraphy, the combination of a pair of
terminals, means for producing sparks between the terminals,
a transformer, connections between one winding of the trans-
former and the terminals, a condenser in one of the connec-
tions, a conductor, a capacity, and connections between the
other winding of the transformer and the conductor and
capacity. (8.) Apparatus for wireless telegraphy substan-
tially as described, and illustrated in the drawings.
(Specification, 12s.; drawings, 1s.)

No. 13214.—1st December, 1900.—JOHN ANDERSON, of
Dunedin, New Zealand, Engineer and Coppersmith. Im-
proved appliance for and method of sprinkling butter with
salt, especially applicable to dairy factories.

Claims.—(1.) In butter-making, especially by machinery,
the combination with a butter-working machine of a cylinder
such as C, C¹, formed to contain the desired quantity of salt
and to sprinkle same on butter being worked, when the salt
is thoroughly incorporated by the usual process of turning
the butter under the usual rollers, substantially as set forth.
(2.) In combination, an ordinary butter-working machine
A, B, and a cylinder C, C¹, geared by such gearing as D or
D¹, for quick stopping or starting by such means as E and
F, for the purpose of sprinkling butter with salt during
working up of same, substantially as set forth. (3.) In
butter-working, in combination, a self-acting sieve, shaking,
rocking, or revolving over butter, charged with the necessary
amount of salt for sprinkling over butter passing below and
being worked, substantially as set forth.
(Specification, 3s.; drawings, 1s.)

No. 13218.—6th December, 1900.—THOMAS DANIELLS
MERTON, of the Spottiswoode Refinery and Metallurgical
Works, Spottiswoode, near Melbourne, Victoria, Metallurgist.
An improved ore-roasting furnace.

Claims.—(1.) The described ore-roasting furnace, consist-
ing essentially of a series of hearths arranged one above the
other, each provided with horizontally rotating rabbling-
arms and with discharge-openings at alternate ends of said
hearths, in combination with a rest chamber as E, and a
revolving finishing-cylinder as G, substantially as and for the
purposes specified. (2.) In an ore-roasting furnace, a series
of horizontal hearths arranged one above the other, and each
discharging into the one below, in combination with a re-
volving finishing-cylinder, substantially as and for the pur-
poses specified. (3.) In an ore-roasting furnace, rabbling-
arms projecting from fixed arms mounted upon rotating
spindles, and having upwardly projecting notched lugs
adapted to be engaged by stays extending from said rabbling-
arms, substantially as and for the purposes specified. (4.) In
an ore-roasting furnace, a revolving finishing-cylinder as G,
having air-inlet ports or openings around one end, and means
for automatically closing them when at the top and opening
them when at the bottom as the cylinder revolves, substan-
tially as and for the purposes specified.
(Specification, 6s.; drawings, 2s.)

No. 13219.—3rd December, 1900.—THOMAS KNOX, of
Ohaeawai, Bay of Islands, Auckland, New Zealand, Mail
Contractor. An improved horse-cover attachment.

Claim.—The strap sewn to the top of the horse-cover,
and its two free ends buckled to the front of the horse-cover,
for the purpose set forth, substantially as described and
illustrated.
(Specification, 1s. 3d.; drawings, 1s.)