April 3, 1914.

THE COLLIERY GUARDIAN.

755

CONTRACTS OPEN FOR COAL AND COKE.

For Contracts Advertised in this issue received too late for
inclusion in this column, see Leader and Last White
pages

London, April 16. — The directors are prepared to
receive tenders for the supply of 150,000 tons of clean,
dry, unscreened, fresh-wrought gas coals, delivered f o.b.
to the company's steamers at any suitable port during
a period of 12 months commencing June 1, 1914. The
deliveries to be in about equal monthly quantities. Pay-
ment in cash monthly. Particulars and forms of contract
may be obtained from the engineer and general manager,
Mr. S. H. Jones. The directors do not bind themselves to
accept the lowest or any tender. Tenders sealed and
endorsed “Tender for Coals" to be addressed to the chair-
man and delivered at the company's offices, Commercial
Gasworks, Stepney, E, not later than 9 a.m. on the
16th inst.

Abstracts of Contracts Open.

Carnarvon, April 11.—Good house coal, for police
stations in the county of Carnarvon. Tenders to the Chief
Constable's Office, Carnarvon.

Coseley, April 15.—Coke and best quality thick coal,
for the Education Committee. Forms from Mr. Fred J. C.
Poole, secretary, Education Offices, Coseley.

Goole, April 7.—About 100 tons of steam coal and 70
tons of house coal, for the Guardians. Forms of Mr. G.
England, clerk, Bank-chambers, Goole.

Hawick, April 10.—About 9,000 tons of gas coal (screened
and unscreened), treble and double nuts and coking dross,
for the directors of the Hawick Gas Light Company. Forms
from Mr. James D. Keillor, engineer.

Hull, April 9.—Best South Yorkshire screened hard
steam c >al, for the Corporation. Forms from the Water
$nd Gas Offices, Alfred Gelder-street, Hull.

Leith, April 15.—Coal, for the Harbour and Docks
Commissioners. Particulars from superintendent, Tower-
place, Leith.

Lisnaskea (Ireland), April 10.—About 30 tons best
Scotch coal (screened) and 20 tons Irish coal (screened), for
the Guardians. Endorsed tenders addressed “ To the
Presiding Chairman, Board of Guardians," must be sent to
Mr. J. O’R. Hoey, clerk oZ the Union, Boardroom, Lisnaskea
Workhouse.

London, April 15.—About 175,000 tons of clean, dry,
unscreened, fresh wrought gas coal, for the directors of the
Wandsworth, Wimbledon and Epsom District Gas Company.
Further particulars from the engineer, Mr. H. O. Carr.

Rochester, April 8.—About 36,000 tons of gas coal, for
the directors of the Rochester, Chatham, and Gillingham
Gas Company. Forms from Mr. C. Valon Bennett, engineer
and general manager.

Sofia, April 17.—Tenders are invited by the Bulgarian
Directorate-General of Railways and Ports for 12,000 metric
tons of Cardiff coal for locomotives.*

Tunbridge Wells, April 20.—About 4,000 tons of small
coal (for use with underfeed stokers), for the Corporation.
Specifications from the Borough Electrical Engineer,
Electricity Works, Stanley-road, Tunbridge Wells.

West Buckland (Devon), April 7.—Coal and oil, for
the Governors of the West Buckland (Devon) County
School Foundation. Tenders to the Governors.

The date given is the latest upon which tenders can be received.

CONTRACTS OPEN FOR ENGINEERING, IRON
AND STEEL WORK, Ac.

Aberdare (Wales), April 15.—Cast Iron Pipes.—About
132 tons of 9 in. case iron pipes, for the Urban District
Council. Specifications from the surveyor, Town Hall,
Aberdare.

Aberdare (Wales), April 15.—Pipe Laying —Laying
1,630 lineal yards of 9 in. cast iron water pipes, 2,370 lineal
yards of 7 in. steel water tubes, and 1,050 lineal yards of
4 in. steel water tubes, for the Urban District Council.
Specification from the Surveyor, Town Hall, Aberdare.

Bootle (Lancs.), April 22—Converters, $c.—For the
Corporation:—Two 500-600-kw. rotary converters, trans-
formers and switch gear. Forms at the Borough Electrical
Engineer's Office, Electric Light Station, Pine-grove,
Bootle.

Bristol, April 13.—Wrought Iron and Steel.—Wrought
iron and steel, for the Corporation. Specifications from the
city engineer, 63, Queen-square, Bristol, on payment of 10s.
{returnable).

Bampton (Oxon), April 6.—Waterworks Extension.—
Laying about 1,800 yards of 3 in. service mains, with
necessary fittings, and supplying a vertical oil engine,
three-throw pump, two air compressors, air-lift plant, and
necessary piping to connect to existing maim for the
Witney Rural District Council. Particulars from the
Council's consulting engineer, Mr. H. Howard Humphreys,
of 28, Victoria-street, Westminster, S.W., on payment of
£2 2s. (returnable).

Barnsley.—Sinking Shaft.—For sinking colliery shaft
50 yards by 8 ft. Particulars of strata may be had from
the Victoria Colliery Company Limited, Barnsley.

Bridgwater, April 13.—Cast Iron Pipes, <fyc.—About
124 tons of 3 in. cast iron pipes and other castings, for the
Rural District Council. Specification from the clerk, at the
Council Offices, Bridgwater, on payment of 2 guineas
{returnable).

Chale, &c. (I.W.), April 29.—Cast Iron Mains.—About
15,560 yards of 2 in., 3 in. and 4 in. mains, for the Isle of
Wight Rural District Council. Specification from the
engineer, Mr. W. Phelps, C.E., Charlton-road, Shepton
Mallett, Somerset, on payment of £2 2s. (returnable).

Chelmsford, April 20.—Borehole.—Sinking of a 14-in.
borehole, adjoining the Admiral's Park, Water Tower,
Rainsford-rQad, Chelmsford, for the Corporation. Specifi-
cation from the borough surveyor, Municipal Offices,
London-road.

Devonport, April 8.—Turbo-alternator, <fyc.—For the
Corporation: 1,250-k.w. turbo-alternator, with condensing

* Specifications, particulars, &c., may be seen at the
Commercial Intelligence Branch of the Board of Trade,
73, Basinghall-street, E.C.

plant; two 500-kw. rotary converters and switchgear.
Specifications from Mr. J. W. Spark, borough electrical
engineer, East Stonehouse, Devon, on deposit of two guineas
(returnable).

Devonport, April 27.—Crane, <fyc.—Three-ton electrically
driven jib crane; also 150-ton capacity coal hoppers, in steel
or reinforced concrete, to be erected at Pottery Quay,
Devonport, for the Corporation. Specification from Mr.
Isaac Carr, Widnes, on payment of .£1 Is. (returnable).

Dunswell (near Cottingham), April 18.—Cast-iron
Lining, §c —About 200 tons of cast iron lining for pumping
well and shafts at Dunswell, for the Hull Corporation.
Specification on payment of il (returnable) from Mr. C.
B. Newton, city water and gas engineer.

Hunslet (Yorks.), April 8.—Pipes and Valves.—Cast and
wrought iron pipes, valves and other steam fittings, for the
Guardians. Specifications from Mr. Fred W. Mee, clerk to
the Guardians, Union Offices, Hunslet, Leeds.

Keighley, April 11.—Reservoir, tyc.—Construction of a
storage reservoir, for the Corporation. Specification from
the engineer, Mr. H. Ratcliffe Barnett, at the Town Hall,
Keighley.

Llangyfelach. — Heading. — Driving a hard heading,
probably 60 yards long, inclination 6 in. to the yard, size
10 ft. by 7 ft. Manholes and timbering to be carried on
simultaneously. Tenders to the Tirdonkin Colliery Office,
Llangyfelach, near Morriston.

London, April 4 8.— Water Softener.—Water softener,
for the St. John, Hampstead, Guardians. Further particulars
from Mr. H. Westbury Preston, Guardians' Offices, New
End, Hampstead, N.W.

London, April 6.—Steel Piping.—About 1,730 ft. of 18in»
welded steel pipe, I in. thick, in 18 ft. lengths, for the
Metropolitan Water Board. Specifications from the engi-
neer, Metropolitan Water Board, Savoy-court, Strand, W.C.

London, April 23—Wagons—Covered goods wagons
and open goods wagons, without wheels and axles, for the
Bengal Nagpur Railway Company Limited. Specifications
at the company's offices, 132, Gresham House, Old Broad-
street, London, E.C.

Manchester April 8.—Cast Iron Water Pipes.— About
500 tons of cast iron water pipes (3 in., 4 in., 5 in., 6 in. and
7 in. diameter) with about 100 tons of special castings, for
the Corporation. Also for the supply of cast iron hydraulic
(high pressure) pipes (1| in., 2 in., 3 in., 4 in., 5 in. and 6 in.
diameter) and special castings. Specifications from the
secretary, Waterworks Offices, Town Hall, Manchester, on
payment of 10s. (returnable).

North Curry (Somerset), April 14.—Waterworks
Construction.—For the Taunton Rural District Council,
sluice valves, air valves, hydrants and surface boxes, &o.;
about 2 miles of 4 in., 4 miles of 3 in., and 4 miles of 2 in.
cast iron miins respectively, together with all necessary
specials, &c.; about 2 miles of 4 in., 4 miles of 3 in., and
4 miles of 2 in. cast iron water mains, including fixing
valves, hydrants, &c., and all works in relation thereto.
Specifications from the engineer upon payment of £2 2s.
(returnable).

Midsomer Norton, April 13.—Steel Pipes.—About 385
yards of 8-in., 845 yards of 6-in., and 590 yards of 3-in. steel
socketed pip os, for the directors of the Midsomer Gas .Com-
piny. Speoificaticn from secretary, Mr* A. E. Maggs.
14, High-street, Midsomer Norton.

Portsmouth.—Turbo-alternator —Erection of a 2,000-k.w.
turbo-alcernator, complete with circulating and air pumps,
for the Corporation. Specification from the engineer and
manager, Electric Lighting Station, Gun wharf-road,
Portsmouth, on payment of a fee of £3 3i. (returnable).

Quilimane (Portuguese East Africa), May 15-18.—
Steel Rails and Fishplates.— Tenders are invited by the
Public Works Department of the Province of Mozambique
for the supply of (1) 3,600 metric tons of steel rails, 10,200
pairs of fishplates, 41,000 bolts, 73,400 metal sleepers, and
20 crossings; and (2) 1,500 metric tons of steel rails, 12,000
pairs of fishplates, 52,000 bolts, 68,000 metal sleepers, and
20 crossings.*

Rathkeale (Limerick), April 18.—Electrical Plant.—
For the Rathkeale Electric Light and Power Company, in
connection with the electric lighting of the town:—Gas
engines and suction plant, dynamos, storage battery,
switchboard, and overhead lines and street lamps.
Specifications from secretary at Rathkeale.

Rochdale, April 15. — Feed Pumps, fyc.— Boiler feed
pumps and electrically driven engine-room crane, for the
Electricity Committee of the Corporation. Specifications
from Mr. C. C. Atchison, M.I E.E , engineer and manager,
Dane-street, Rochdale, on receipt of £2 2s. (returnable).

Tangier (Morocco), April 18.—Electric Cranes, fyc.—
The Moroccan Adjudications Commission intends to
contract, by private arrangement after competition, for
four electric cranes and electric power plant.*

Tauranga (New Zealand), May 11.—Hydro-electric
Plant.—Hydro-electric and sub-station plant, for the Town
Council. Specifications from Messrs. H. W. Climie and
Son, engineers, Tauranga, N.Z, on payment of £2
(returnable).

Warrington, April 14.—Motors, fyc.—Motors and trans-
formers, for the Corporation. Specifications on payment of
^1 Is. (returnable), from Mr. F. V. L. Mathias, borough
electrical and tramways engineer, Howley, Warrington.

* Specifications, particulars, &c., may be seen at the
Commercial Intelligence Branch of the Board of Trade,
73, Basinghall-street, E.C.

Grimsby Coal Exports.—The exports of coal from
Grimsby during the week ended Thursday, 26 bh ult., as
shown by the official returns, were as follow :—Foreign—
To Antwerp, 420 tons ; Christiania, 100; Dieppe, 1,390;
Esbjerg, 265; Gothenburg, 535 ; Hamburg, 1,894; Kris-
tiansand, 609; Larvik, 626; Libau, 2,210; Malmo, 2,644;
Banders, 1,060; Riga, 2,337; Ronehamn, 728 ; Rotterdam,
837 ; Skien, 1,403; Vallo, 782; Videz, 748; Wisby, 768 ;
and Ystad, 2,173 ; total, 21,529 tons. Coastal—To London,
214; Rye, 180; and Whitstable, 280; total, 674 tons.
During the corresponding week last year the exports
totalled 22,089 tons and 364 tons respectively.

ABSTRACTS OF PATENT SPECIFICATIONS
RECENTLY ACCEPTED.

2754 (1913). Improvements in. Machinery for Compressing
Air and other Elastic Fluids in Several Stages. , Reavell and
Co. Limited, W. Rea veil, and E. W. Jones, of Ranelagh
Works, Ipswich, Suffolk.—Relates primarily to three-stage
compressors, in which one end of the intermediate cylinder
is in constant communication with the delivery valve of the
low-pressure cylinder and with the inlet valve of the high-
pressure cylinder through one or more intercoolers ; but it
is applicable also to compressors which have a higher
number of cylinders, whether vertical or horizontal. The
principal objects are to increase the capacity of production
and to render the output variable according to requirements.
A known type of vertical three-stage compressors without
valves at the intermediate stage comprises three single-,
acting cylinders of consecutively decreasing volumes, the
low-pressure and high-pressure cylinders being placed
axially one above the other and their pistons joined,
together, while the intermediate cylinder is in line with

the other cylinders, but on the diametrically opposite side
of a crank shaft, the high-pressure and the intermediate
pistons being trunk pistons driven from the crank shaft by
a pair of connecting rods operated by the same crank pin.
In order to increase the capacity or output of such com-
pressors when required, the intermediate cylinder and piston,
are rendered double-acting, the lower end (or that furthest
from the low-pressure cylinder) being in constant communi-
cation with the delivery valve box of the low-pressure
cylinder and with the inlet valve of the high-pressure
cylinder, while the upper end of the intermediate cylinder
(or that nearest to the low-pressure cylinder) has a suction
valve communicating with the atmosphere and a delivery
valve communicating with the pipe leading to the inter-
mediate cylinder from the low-pressure cylinder through
the intercooler. Fig. 1 is a vertical section of a vertical
three-stage compressor embodying the invention; fig. 2 is
a side view of the driving mechanism at right angles to
fig. 1 and a section through the cylinders; and fig. 3 is a
vertical section on a larger scale of a pair of valves of a
double-acting intermediate cylinder provided with automatic
regulation for the low-pressure side. (Four claims.)

5292 (1913). New Method for the Discovery of Minerals*
A. Williams, of Room 675, Mansion House-chambers,
Bucklersbury, E C.—According to this invention the
mineral to be discovered, which normally will be immersed
in the saline moisture which permeates the subsoil, is
caused to constitute a current-generating element of an
electric battery the instant contact is made therewith by
a probing-rod or penetrating drill, the second generating
element of the improvised battery being provided by
planting in the damp ground, in the neighbourhood of the
mineral to be discovered, an electrode which is composed of
metal which has an electro-chemical potential differing from
that of the mineral to be discovered. The probing-rod or
drilljis interconnected with the second electrode by a flexible
conductor, and means for detecting the passage of an
electric current or impulse through the conductor is pro-
vided. The invention includes also a method of deter-
mining the character of the discovered mineral which is
penetrated by the probing spike, or touched by any portion
of it, by identifying it by a process of comparison with one
or more of a plurality of kinds of metalliferous 'material of
known composition which may possibly, and will probably,
be encountered in the probing operation, and this without
requiring the probing spike to be withdrawn. Moreover, if
the mineral resides in a layer interposed between material
of different compositions, the depth, width and varying
shape of the said layer or pocket can by this invention be
ascertained with precision. (Three claims.)

5858 (1913). Improvements in Pit Cage Arresters. J. Yates,
of 13, Joseph-street, Sutton, St. Helens, Lancashire, and
C. Heyes, Locomotive Inn, Sutton, St. Helens.—Consists
of a gripping appliance for the conducting rods of the

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cage, which appliance travels with the cage but is not
connected thereto. On the breakage of the winding rope
or suspension chains of the cage, a spring or load, or both
combined, is or are arranged to cause the appliances or