VICTORY
Flush Valve
SELF-CLEANSING FLUSH VALVE
Simple lover movement causes valve to open automa- leally by water pressure. Valve closes automatically after flushing Gives 50′; greater flush than the usual cistern.
Only one moving part. No complicated mechanism to get out of order.
Only Twn Gallons of water can be released by one deflection of the handile.
Self-closing: the moving piston automatically clears dirt trust gril.
No leaks; water wastage eliminated. Easily fitted to meet existing installations.
Especially suitable for marine use.
Withstands the
nction of sen water, being made from the nest materials
it is possible to procure.
SILENT WORKING
A Flush in a Flash
Ample Stocks Carried
REISS, BRADLEY & CO., LTD.
National City Bank of New York Bldg.,
2 Queen's Rd., C.
FOR
Tals: 28006/7.
QUALITY-DURABILITY-DESIGN
INSTALL
"Standard"
PLUMBING FIXTURES
WRITE FOR OUR HOME BOOKLET
AGENTS
ANDERSEN, MEYER & COMPANY, LTD. TEL: 28001.
DAVID HOUSE
Can I have them
COOLED?
THE CHINA MAIL, THURSDAY, OCTOBER 7, 1040.
ENGINEERING PAGE
PROVIDING A SURFACE WAR SUPPLY UNDER DIFFICULTIES
of the core below
instings is a historic town in for the eventuality of a parti-, puddie core in a trench approxiįwas a serious developinent, call- the south-east of England and a culrirly diy winter, the storage intely 40 to 50 feet deep, carrieding for entirely different con- progressive seaside resort. It has enpacity had to be relatively up to near embankment top, this struction
puddle core to be backed both ground and for some means of resident population of 67,000 great. which increases to twice or three The scheme provided for the sides with selected material and preventing the water from the Darwell. finished with earth gilleg hoth completed reservoir passing be times that number in the sum damming of the river wick senson, Lying less than 70 with a gathering ground of 2,382 sides; the slopes on the upstream tow the duni through the Ash- and making it starting at 1 in d at the tee, down sandstone iniles from London, It has a larke ueres, to be supplemented,
nt the top, incapable of properly slaving the population on which to draw for consumption of Hastings in-and finishing of 1 In
weekends and creased, by the diversion
the downstream side water. of while un streams in neighbouring valleys the slopes varled from 1 in 4 to by means of tunselled aqueducts 1 in 24. The form of construe- through the hills, The total area on is generally in necord with
during Visitors public holidays.
The bloterland and surrounding district are hly the surface layer consists of Tunbridge Wells and- stone, below which ties the Wad- hurst clay, more or less imper. neable, but with occasional thin water bearing shale beds. Below This lies the Ashdown sandstone, water bearing formation widely exploited in the district far eink- ing wells.
time of the From the
Arst public water supply to the year 1920 the town relied on the yields from wells sunk down into the Ashdown Bandstone. The origina) vield of these weils is never maintained, and tends to diminish for a considerable time befork reaching an ultimate fixer yield. ultimate yield may drop to
Arst
a half or even one-third of the yield when the well was senk. The general effect of thi has been that many of the older wells were abandoned ucchus supply an of their diminished replaced by new ones.
In 1926 there were eight well: The total reliable yield of which than
was
estimated
1,340,000
mnuni
at no more
a day, and
ion of the town. nt the rate
vas increasing steadily or 50,000 Billions
a day each year. All the best well sites had been utilised and any lett could not be relied on to supply more than between 100,000 and 150,000 gal- lons datly: thus the need to meet the, ever incressing consumption would havr been a new well every two or three years.
Experience Of Great
Sanders Dam
It was clear that some other means than wells in the Ashdown must be found, and after first in the distant ¡considering wells
chalk, it was decided to ichpound surface water. .and accordingly Dam Was
built, giving a yield of 300,000
the Great Shillonga"
Minimum a day
The Impounding of water for public water supply was an novation in
in this part
of
Et had not been used previously because of adverse conditions
low rainfall and high
tion losses from tempera- | fure and geological conditions. Streams and rivers which almost run dry in the summer are often raging torrents In the winter. The
is about average rainfall
32
18
Giant Generator
A milion-voit cascade generator for nuclear physica ra-
1) goarch "has' recently been installed in the Clarendon Laboratory, Oxford. This is part of a general programme for increasing the facilities, tor, nuclear physics research sponsored by the Department of Scientific and industrial Research under Sie Edward Appleton.
to
Concrete Core Exploratory bores were Bunk
below above and
the dum prove the extent of the Ashdown giralo. water-bearing and any the water levels of all these bores were taken daily and recorded. A series of bores was put down along the foundation french und taken into the Ashdown form. tion, these bores being generally Portiand In tervals. at 20-foot
pumped. ccinent grout was thea under pressure, into the bores in the trench every fourth hole along the entire length of french; ther all the intermediate hales were pressure grouted, daily records being kept of the water lines of
ly
up and downstream bores, And the amount of grout put into cach hole. This process Bully resulted in there being apparent- water connection between the up and downstream holes.
The
condition. changed
re: quired the cofe helow ground to be concrete stench of puddle elay. This was Anished Just be- low ground level with a nasing rendy in receive the puddle core to be carried up in the earth Alling and the trench
currying this core at the junction of the concrete wa V'd so that as the clay sank it would tighten coch side between the "V" and the nosing. As
additional inserted precaution, tubes were
$1
at intervals in the concrete core so that should further pressure grouting be proved necessary, it could be done teadly. The up. stream bores wère grouted up: and there is now good ground for supposing that the Ashdown intrusion has been
deal with.
METAL WINDOWS
by GIBBONS
GILMAN & COMPANY, LTD.
ENGINEERING DEPARTMENT Telephone 31,1,46
From the Blueprint
to the
Finished Job
effectively REISS, BRADLEY ENGINEERS
At each end of dam
series of bores at 58-foot inter ARE OUT TO HELP YOU !
volg
over
and extending for 1,000 feet are being sunk at right angles to the line of the dam to Jorin a cut-off wing when they have been pressure grouted,
Work on the dam was started in late 1937 and was interrupted by the outbreak of World War II. is now being completed with the limited
Jabour
bour available. Three quarter-yurd mechanical being used, the material being transported by
excavators are
narrow gauge locos and wagons.
Free estimates are only part of Reiss, Bradley's -engineering service! Come to us for repair jobs,. for prompt efficiency and skill in all construction work-for the supply of roofing sanitation, electrical refrigeration, air conditioning, hot and cold systems, heating and ventilation and other Installations.
The clay puddle is mechanically *Reiss, Bradley
excavated.
narrow
Robige locsansported by
"passed through," a of the watershed of these ad- English practice, the downstream pug-lll, then taken by narrow
inches and the mean average of dinional streams. is 7,000 peres. Įside being thoroughly under-gauge locas for forming the core.
three consecutive about 20 inches.
It
dry years
expected that the work will Riving a total watershed, with the drained at ground level and the
9,400 acres, upstream Darwell, of nearly
at the completed by the end of the side shingled
of streams. year and gauging Gauging.or
and the of streams
vive a minimum bottom of the slope bren
which have continued since 1936, experience and data obtained at estimated to
upper portion. the Great Sanders Dam showed average yield of 14,750,000 gallons paved on the
a day during the driest period Draw-off tower, tunnel and over-indicate that the estimated yield that the in-rajn during the sun with. the storage copacily pro- flow are provided and tunnel will be reached.
may be less than thei posed. evaporation losses. Accordingly the winter rainfall was all im- portant, and therefore, to provide
mer
MADAM,
You Can
Have Them
Super-Cooled!
They're happy customer in estores, snack bars, cafes Gilman-equipped, will truly modern refrigeration service. .. Contrated customers quickly return the outlay in one of Gilman's 'Refrigeration units. Pictured here is the fine- * finished Rapid Action Bottle Cooler (252 12-ox battles) to beautify any store, speed up service. At the Gloucester Arcade Showroom you'll see Display Cases, Water-Coofers, Ice-Cream Cabinets and Ira- Cream Makers, a grand range of Commercial Refrigerators, all for Immediate delivery 1 And if it's spares you" nhed, Evaporator Coils or Candens«
Units Call Gliman's!
pd by
THE-SUPI
GILMAN & COMPANY LIMITED
REFRIGERATION "DEPAR
GLOUCESTER, ARCADE.
EPHO
Construction Difficulties
aqu
long.
nqueduct 24 miles maximum depth 185 feet, with
New Trains In Holland
44 miles of reinforced concrete pipeline to the pumping station.
The Sinking of the foundation Borings on the line of the dom trench, which was Hone with indicated that the strata through-tools worked by an
Crampton Parkinson Limited electrically traction motora) and the West- out was Wadhurst clay, and inas-driven ale compressor, made goodinghouse Frake and Signal Com- ruch as the Tunbridge Wells progress. Nothing untoward sandstone was at top water line, cecurred theyond encountering pany Limited (air brake devices)
some thin water-bearing shales) both contributed
two United Kingdom firms have bad ths Wadhurst is never less some than 300 feet thick, It suggested until The trench
components to was about half- suitable authte ajo, the dip being up way through, when an Intrusion 16ew tramcars being made for
of the Darwell.
the Hogue Tramways, Holland. The of. Ashdown
rising These cars sandstone, is 000 almost vertically and renching al-
ure of a new type. capacity of the reservoir million gallons, depth of water almost to ground level, was struck designed to provide greater seat- feet,' length of dari 1,880 feet, and Water was met a few feet down: ing capacity, und are being made locally from equipment supplied maximum thickness at the base and 28 excavation continued, 300 foot. The total amount of water had to be pumped at the by a number of manufacturers.
Crompton Parkinson are sup Alling is 500,000 cubic yards. The rate of one million gallons a day plying 64 62-horse-power mo- construction intended was a clay as the trench was sunk. This fors for the new cars, and in ad-
THE LINCOLN
300 AMPS WELDING GENERATOR
SHIELD ARC WELDER'S
AUTOMATIC WELDING EQUIPMENT
FLEETWELD ELECTRODES"
STOCKS CARRIED.
JUP INGLIS & SONS LTD.
INER CHATHAM and MATAUWEIRD.
TEL.NO.58054
Prentative „for South Ching and Hong Kong:
LINGOLI ECTRIC CO.
dition 00 90-horse-power motors for replacements on old cars.
The new cara scat 30 passen- gere, with 00, to.70 standing. De- algned to operate
single unit or with trailers, the cars have four braking methods
rheostatic, air, electromagnetic,
and hand. Bogles are two axle units which allow for four 03- horsepower motora in each car in- stend of two. A higher rate of ac ¿celeration is „Jhús ̈provided. Maximum speed of a single unit is about 37 miles an hour.
PREPARING FOR
THE 1949 BIF
to be
In preparation for the 1949 British / Indificios | Fair, held in London und Birmingham from May 2 to May 13 next, various
[Unitel: Klrigdom: trade associations are co-operating with Britain's Export Promotion De partment, the "arrpoging of uniform seltemes of presentation. Since, however, participation." In these special arrangements ja not confined to uzsociation members, exhibitors may take advantage of" them and so sectro-full beneff | from the co-prifnated displays". Inquiries concëriiltfg" the Fair can' be addressalto, the Export-Pros motions Department: Exhibitions Divisiony 27 Out Quee
Stroet,
London, Birmingham Chamber of Com Imerce. Da, „New, „Etreel, Aimming-.
England.
& Co., Ltd.
Engineering Dept.
2 Queen's Rd., C. Tol. 28097.
FALCO ELECTRIC COOKER.
An electric cooker.
promises to be a “good companion for life.
Dial the temperature you want, and that's the temperature you'sht
Also offering
GO Heat-controlled Electric IRONS
FALCO Electric FIRES.
AGENTS
A
CARTER & SUTTON
230-A, Hong Kong & Shanghai- Bank Bülding. Tel. 28004;
SUTTON,
HARRIMAN REALTY CO., LTD.
REAL ESTATE BROKERS AND, NALUEBS "COME TO US FOR"ADVICE": L TYPES INDUSTRIAL COMEÉTIC
MAGENTAVAILABIA BU 201Viatory House Wyndband: Siew
Telegraris CHarrikitiln