1024
THE NEW ZEALAND GAZETTE.
[No. 48

to remove therefrom at each cycle. It will be seen from the
chemical reactions hereinbefore described that for the com-
plete and continuous operation of this process two iron
anodes are required to one carbon-anode vat of equal deposit-
ing-capacity. A study of the above-described conditions of
working will show that the process is continuous, and that
each portion of the solution passes through a cycle of opera-
tions thus: Beginning with a ferric solution containing more
or less zinc, and acting on the oxidized ore, the operations
are as follows: First, leaching, whereby iron is thrown out
of solution and zinc substituted; Second, circulation past
the cathodes in the zinc electro depositing plant, where the
excess of zinc is taken out; Third, circulation past the iron
anodes, where ferrous salts are imparted to the solution;
Fourth, circulation past the carbon anodes, where the ferrous
salts are oxidized to ferric salts, and the solution thereby
regenerated and ready to be again employed for leaching.
Although I have found carbon anodes the most efficient and
economical means for oxidizing the ferrous-salt solution to
the ferric state, I would have it understood that this may be
effected by known and suitable chemical reagents, such, for
instance, as chlorine gas, as will be well understood."

54. To strike out the present claims—i.e., from and in-
    cluding the word "First," line 19, page 17, to and including
    the word "described," line 18, page 21.

55. To insert fresh claims as follows: viz., "First, The
    herein-described process for the treatment of zinc-bearing
    ores and zinc-bearing products, consisting essentially in—
    first, oxidizing such ores or products as require it; secondly,
    leaching the oxidized ore or product with a solution contain-
    ing a ferric salt; thirdly, electrolysing the resulting zinc
    solution by first passing it around the metallic cathodes and
    then around the iron anodes, and subsequently around the
    carbon or other insoluble anodes of an electrolytic system of
    vats (for the purpose of raising the ferrous salts to the ferric
    state), substantially as and for the purposes specified. Second,
    In the treatment of zinc-bearing ores and zinc-bearing pro-
    ducts, passing a zinc-bearing solution first around the metal-
    lic cathodes, then around the iron anodes, and subsequently
    around the carbon or other insoluble anodes of an electrolytic
    system of vats, substantially as and for the purposes specified.
    Third, In the treatment of zinc-bearing ores and zinc-bearing
    products the herein-described method of simultaneously
    raising a ferrous-salt solution to a ferric-salt solution, and
    depositing zinc from a catholyte free from iron by means of
    electrolysis with carbon or other insoluble anodes and metal-
    lic cathodes, substantially as and for the purposes set forth."

56. To substitute three fresh sheets of drawings, contain-
    ing three figures, in place of those at present attached to the
    specification.

The applicant states that "My reasons for making this
amendment are as follow: That since the date of my appli-
cation I have ascertained that some of the claims in my
specification are wanting in novelty; and I have been advised
that others are not sufficiently precise, and that some of
the descriptive parts, especially that relating to the circula-
tion of the liquid in the electrolysis vats, are insufficient,
and in part incorrect, and can only be clearly illustrated by
reference to further drawings.

F. WALDEGRAVE,
Deputy Registrar.

Further Fees paid.

LETTERS PATENT on which the second term's fee
has been paid (the dates of payment are noted at the
end) :—
No. 5078.—R. Stanley, tunnelling and mining machines.
24th June, 1895.
No. 5094.—F. Y. Wolseley, cutters of sheep-shears. 20th
June, 1895.
No. 5120.—F. Luck, loading wagons. 26th June, 1895.
F. WALDEGRAVE,
Deputy Registrar.

Dealings with Letters Patent registered.

LIST of subsequent proprietors of Letters Patent regis-
tered (the names of the patentees are given in
brackets, and the dates of registration at the end) :—
No. 5207.—The Evening Star Company (Limited), of Dun-
edin, New Zealand, paper-bag-making machine. [R. Millis.]
13th June, 1895.
F. WALDEGRAVE,
Deputy Registrar.

Applications for Letters Patent lapsed.

LIST of applications for Letters Patent (with which com-
plete specifications have been lodged) lapsed from
the 13th June, 1895, to the 26th June, 1895, inclusive:—
No. 6591.—J. Curtis, seed or grain separator.
F. WALDEGRAVE,
Deputy Registrar.

Letters Patent void.

LIST of Letters Patent void through non-payment of fee
for second term, from the 13th June, 1895, to the 26th
June, 1895, inclusive:—
No. 4887.—A. and G. Cameron, cigarette-machines (H.
Bohls).
No. 4888.—L. A. Groth, tanning hides and skins.
No. 4889.—H. T. Smith, oil-lamps.
No. 4893.—N. Dodgshun, tailor's press-board.
No. 4895.—R. P. Rothwell, sinking shafts.
No. 4896.—J. Trevethick, manufacturing brooms, &c.
No. 4898.—T. J. Hood, boots, &c.
No. 4901.—R. Hornsby and Sons (Limited), harvesting-
machines (J. Hornsby, J. Innocent, and J. H. Smith).
No. 4905.—W. G. M. Call, washing cotton-waste, &c.
No. 4906.—A. C. Holden, scrubbing and mopping appli-
ance.
No. 4907.—T. O. Bennett, sheep-shears.
No. 4908.—W. Clark, watercloset.
No. 4909.—A. Gross, locking nuts on bolts.
F. WALDEGRAVE,
Deputy Registrar.

Letters Patent sealed.

LIST of Letters Patent sealed from the 13th June, 1895,
to the 26th June, 1895, inclusive:—
No. 6735.—A. Holmes, landing-nets.
No. 6739.—T. C. Dennison, cycles.
No. 6767.—E. Mazure, corking-machines.
No. 6823.—W. H. Hannam, water-heaters.
No. 6860.—E. Purser, manufacture of briquettes from
ironsand.
No. 6936.—J. D. Scouler, sheep-shearing machines.
No. 7209.—R. M. Macdonald, engine-governor.
No. 7215.—A. L. J. Tait, churn.
No. 7395.—C. Pratten, moulding and dividing plastic
materials.
No. 7404.—H. T. Reid, oil- and gas-engines.
No. 7432.—R. M. Macdonald, totalisators.
No. 7433.—H. Dixson, smoking-pipes (F. W. Schroeder).
No. 7434.—The Richardson and Schroeder Patent Smoke-
consuming, Fuel-economizing, and Steam-boiler Company
(Limited), steam-boilers (J. Richardson).
No. 7437.—G. B. and H. P. Jones, rock-drills.
No. 7438.—O. B. Shallenberger, measuring electrical
currents.
No. 7457.—J. T. Penny and W. H. Richardson, triturating
and amalgamating ores.
No. 7458.—M. A. J. Roux, separating metals, &c., from
blendes.
No. 7466.—F. D. Cummer, drying and disintegrating
materials.
No. 7467.—F. S. Salberg, disinfecting refuse.
No. 7469.—J. W. Sutton, recovery of gold.
No. 7478.—C. Weygang, manufacture of saponaceous
products from petroleum.
No. 7479.—C. Weygang, manufacture of artificial fuel
from petroleum.
No. 7481.—N. S. Keith, separating gold and silver from
other materials.
No. 7488.—C. Ewing, rolling-stock for single rails.
No. 7508.—W. Anderson, J. M. Toomey, and W. F. Schey,
determining whether wool, &c., is wet or dry.
No. 7527.—A. H. Hansen, vinegar.
F. WALDEGRAVE,
Deputy Registrar.

Design registered.

NO. 41.—Thomas Erneste Danks, of Linwood, New
Zealand, Class No. 3. 21st June, 1895.
F. WALDEGRAVE,
Deputy Registrar.