APRIL 15.] THE NEW ZEALAND GAZETTE. 909

Letters Patent sealed.

LIST of Letters Patent sealed from the 1st April, 1897, to
the 14th April, 1897, inclusive:—
No. 8031.—J. C. Husband, stump-extractor.
No. 8154.—C. J. Cooze, horse-shoe.
No. 8200.—J. H. Jensen, harrow and cultivator.
No. 8321.—J. A. Packer, artificial limb.
No. 8866.—F. Rowntree, wire-strainer.
No. 8906.—E. L. Oppermann, apparatus for mercury
vapour process.
No. 9037.—A. T. Pfeiff, sterilising milk, &c.
No. 9125.—J. Black, nozzle.
No. 9146.—F. L. and H. W. Teed, regulation-device for
gas-burner.
No. 9164.—J. T. Trench, tire.
No. 9165.—A. Desgoffe and O. Avedyk, making dough.
No. 9166.—F. Billing and W. E. Partridge, joining tubing.
No. 9167.—I. Davis, wheel.
No. 9187.—W. A. Köneman, separating gas.
No. 9193.—E. P. Schoenfelder and E. Kehle, photographic
camera.
No. 9194.—J. J. Warry, tire.
No. 9196.—A. Piedfort, telegraphic receiver.
F. WALDEGRAVE,
Registrar.

Letters Patent on which Second-term Fees have been paid.

[NOTE.—The dates are those of the payments.]
NO. 6121.—Massey-Harris Company (Limited), seed-
sowing machine. (L. M. Jones and J. Wedlake.)
5th April, 1897.
No. 6122.—Massey-Harris Company (Limited), cultivator.
(L. M. Jones and J. Wedlake.) 5th April, 1897.
No. 6126.—B. C. Molloy, dissolving gold, &c. 1st April,
1897.
F. WALDEGRAVE,
Registrar.

Subsequent Proprietors of Letters Patent registered.

[NOTE.—The name of the patentee is given in brackets;
the date is that of registration.]
NO. 8235.—The Ake Ake Chainless Safety Bicycle Com-
pany (Limited), a company duly incorporated under
the provisions of “The Companies Act, 1890,” of Victoria, of
Broken Hill Chambers, Queen Street, Melbourne, Victoria,
cycle-driving mechanism. [L. N. Dyhrberg, W. W. Curties,
and A. Crum.] 13th April, 1897.
No. 8326.—The Tubeless Pneumatic Tire and Capon
Heaton (Limited), of 31, Moor Street, Birmingham, Eng-
land, Manufacturers, pneumatic tire. [H. A. Fleuss, Fleuss
Pneumatic Tire Syndicate, Limited.] 13th April, 1897.
F. WALDEGRAVE,
Registrar.

Notice of Request to amend Specification.

Patent Office,
Wellington, 14th April, 1897.
A REQUEST for leave to amend the specification (in-
cluding drawings) relating to the under-mentioned
Letters Patent has been received, and is open to public
inspection at this office. Any person may, at any time
within one month from the date of this Gazette, give
me notice in writing of opposition to the amendments.
Such notice must set forth the particular grounds of ob-
jection, and be in duplicate. A fee of 10s. is payable
thereon:—
No. 8955.—23rd October, 1896.—Edgar Arthur Ashcroft, of
34, Queen Street, Melbourne, Victoria, Electrical Engineer.
An invention for an improved process for the treatment of
metalliferous ores and products.
The nature of the proposed amendments is as follows, viz.:—
(1.) To insert the words “in the anode chamber” after the
word “solution,” and the word “subsequently” after the
word “be,” line 10, page 3.
(2.) To strike out the words “another batch of,” lines 11
and 12, page 3.
(3.) To insert the word “same” after word “the,” line 12,
page 3.
(4.) To strike out the word “simultaneously” and sub-
stitute therefor the word “also,” line 13, page 3.
(5.) To insert between lines 15 and 16, page 3, the sentence,
“In such electrolysis the solution, after the copper has been
deposited on the copper cathode, is led into the anode com-
partment, where the oxidation of the dissolved ferrous salts
into ferric salts proceeds.”
(6.) To insert after line 18, page 3, the following para-
graph, viz:—

“The process hereinafter described in full with reference
to Figures 1, 2, and 3 of the accompanying drawings will be
best understood by the following preliminary description of
the electrolytic part of the operation with reference to the
diagram Figure 4. The solution containing salts of zinc,
practically pure, is led into the vats A and B (Figure 4 of the
drawings), which are duplicated, coming into the cathode
compartments K. The zinc is partially deposited in the
cathode chambers. The solution then passes into the
anode chamber H. The anodes are copper mattes, and
consequently copper and ferrous salts become added to the
solution. The solution is then led into the cathode cham-
bers of another vat C, where the copper is taken out as
refined metal. Hence the solution containing only zinc and
ferrous salts passes to the anode chamber of the same vat
C, where in contact with carbon anodes its iron content
becomes oxidized to the ferric state. Three vats are shown
diagrammatically in series, so that the quantities of metals
are correctly proportioned for cyclic working in connection
with the leaching process. If the matte contain more than
the best proportion of iron, part of the liquid from the
cathode chamber of C, when freed from copper, is led into
the anode chamber of a similar subsidiary vat with carbon
anodes, where the ferrous salt is oxidized in the anode
chamber. The cathode chamber of this subsidiary vat is
fed with pure zinc solution, from which zinc is deposited on
the zinc cathode. The solution from the cathode chamber
of this subsidiary vat is then added to the anode solutions
in A and B. If, on the other hand, the matte contain too
much copper, a subsidiary vat is interpolated between C and
A and B with iron anodes and copper cathodes and no
diaphragm. Copper is thus deposited, and iron goes into
solution. Merely treating the liquid with metallic iron
may suffice. The pipes d d e shown in the diagram connect
the anode and cathode compartments in each vat.”
(7.) To strike out the first word “zinc,” and also the word
“the,” line 18, page 5.
(8.) To strike out the words “in a zinc-depositing vat,”
lines 3 and 4, claim 1.
(9.) To insert the words “as the anode of a zinc-deposit-
ing vat” after the word “iron,” line 7, claim 1.
(10.) To strike out the word “otherwise,” and insert in-
stead the words “other metal,” line 6, claim 3.
(11.) To strike out the words “and other,” line 2,
claim 4.
(12.) To strike out the words “for leaching roasted zinc-
ore,” and insert instead the words “for use as a leaching
solution while the other metal of the matte—viz., copper—
is being deposited,” line 3, claim 4.
(13.) To add a new figure, Fig. 4, to the drawings.
The applicant states: “My reasons for making this
amendment are as follows: For the purpose of better ex-
plaining the working of the process, correcting certain
errors of description, and better defining and limiting the
scope of the claims.”
F. WALDEGRAVE,
Registrar.

Applications for Letters Patent lapsed.

LIST of applications for Letters Patent (with which com-
plete specifications have been lodged) lapsed, from the
1st April, 1897, to the 14th April, 1897, inclusive:—
No. 7951.—W. Tyree, rat-trap.
No. 7952.—W. Tyree, copying maps, &c.
No. 7954.—W. Tyree, setting fire to grass, &c.
No. 7962.—C. O'Brien, extracting metals.
No. 7963.—R. Cockerell, gold-dredging.
No. 7973.—C. Smith, oyster-opener.
F. WALDEGRAVE,
Registrar.

Letters Patent void.

LIST of Letters Patent void through non-payment of fees,
from the 1st April, 1897, to the 14th April, 1897,
inclusive:—
THROUGH NON-PAYMENT OF SECOND-TERM FEES.
No. 5975.—C. and H. Burgon, shearing sheep, &c.
No. 5976.—H. Dixson, cigarette-holder machine (W. N.
Kernot).
No. 5977.—J. Channon, amalgamator.
No. 5978.—C. E. Seymour, O. A. King, and G. A. Post,
concentrator.
No. 5979.—C. E. Seymour, O. A. King, and G. A. Post,
concentrator.
No. 5981.—J. W. and T. G. Lahey, machine for forming
cask-staves.