Page
THE EXPRESS LIFT CO., LTD.
WITH WHICH IS INCORPORATED THE "BUSINESS of
SMITH, MAJOR & STEVENS, LTD
EXPRESS SMS
LIFTS
MODERN LIFTS
FOR MODERN BUILDINGS
SPEEDY RELIABLE SERVICE
FOR DETAILS. APPLY TO
THE G.E.C., QUEEN'S BUILDING, CHATER ROAD.
EVERYTHING (£E.C.) ELECTRICAL
Capyrizbi
you!
POMPEIAN ENAMEL
اپور
a. Berger
Product
FOR ALL HOUSEHOLD
PURPOSES.
STOCKS CARRIED IN 7 COLOURS.
W. R. LOXLEY & CO.
L. Atkinson
losive leesters
Member of the Call, do
YORK BUILDING, CHATER ROAD.
وریای دیمه
..
HONG KONG DAILY PRESS, SATURDAY, FEBRUARY 27, 1932.
AUTOMATIC DERTH
ENGINEERING AND BUILDING RECORDER
THE NEW PO LEUNG KUK
EXTENSION AND MODERN BUILDING IN LEIGHTON
HILL ROAD.
TO BE OPENED BY H.E. THE GOVERNOR NEXT WEEK.
Tropt ploration of the new To Leung Kuk which will be formally opened by H.X.
the Governor on March 4,
READINGS UP TO 5,000
FATHOMS POSSIBLE.
Take of travel of the paper inoh minupe, during whiod“ period 45 echoes are received und [recorded. This spend givas a close
NEW AID TO NAVIGATION. [but not a bhirred contour; in fact, each echo-line oan bo soon. Wish this scala, depths can be read with in at lanes a fathom (6 foot) By slowing down the travel of the pen Boross the paper, the scale may be. A sharp, quick sound is made by made to read 287 fachoma, but with a steel diaphragm which in vibrat an increased possible error of one od at the rate of 1,050 times a fathom Many vessels are working second by an electro-magnet through with a scale of 400 fathoms, “and which an alternating ourront is | the system can be adapted for read- || passed. The resulting hammer blow Lings up to 5,000 fathoms by a system
sound in cut off instantaneously of phasing in phase of 200 fathoras... with the current.... The echo is Bounding Prboedure Revolutionised. recolved under water by a hydro- This depth recording apparatuş phone,, or what may be described
in conjunction with the echo-sound water-tight tolophone,trans-
As in the ordinary telesoundings by ships at eg and has op has revolutioniped the taking of
made navigation much safer. ford the scho-sounder was invented,
PA
as th mittor:" phone transmitter, the sound converted into electric current and this current is amplified by a wireless valve. The amplied
Be-
was abcessary to stop a ship to take a sounding in deep water; current is directed through a pen and moving band of paper, on and even in shallow water spood which the pen rests. This paper is had to be much reduced. Hence the treated in such a way that the effect operation was put off until the last of the current passing through it moment, sometimes with disastrous is to make a purple mark, which results. Now, the navigating officer avantually turna brown. The re-can start the echo-sounder if he has cording pon is carried by an and any doubt about the depth, and less moving chain, and is made the can see the pen marking the band, in one-third of a second; Moreover, the records are invalu traverse the width of the paper depth on the chart"every second:
ginning at the precise moment of able for future reference. In the sound transmission, and to do trawlers the instrument enables the device marks the water-line, and grounds and to return to them; this once every second. A special skipper to discover new fishing- the echo makes another line of also to follow, certain contour fan. marks at a distance from this line tures of the sea bed which are found varying with the depth. Hence this to be advantageous. In surver
ships the work of taking sounding for the properation of Admiralty charts is reduced to a fraction of what it was when woundings had to be taken with the lead; and to-day the majority of the chart soundings "afe by scho,
The ground for provides, resurmounted by pediment and dome ously contributed funds and to the ception Hall 60 x 00, two dining and flanked by wings containing skill of the architects, Messra. Olark room, 42 x 20 and 26' x 20' and a class and committee rooms, affords and lu who have designed and exe class room 65' x 20'; also committees simple and dignified front seen cuted the work room, kitchens, pantries, servants for slicctively by reason of a clo The old Po Leung Kuk was
vation above the roadway, quarters and lavatories. The upper greatest credit is due to all gosted arco in the West End where situated in a oramped and oop
floor provides thres sleeping wards concerned in the completion of this very necessary extension Was in containing 101 beds, doctors room, desirable addition to the philanth possible. Whilst the new site is matrons and assistant matrons röpfe efforts of the Colony.
focated amidst healthful surround Podma," servante' room, stores, batha The net Po Leung Kuk, the in-ings in grounds dimple for reorealine of marks represents a contour and lavatórios,"
stitution for the protection of intion and with easy approach by bus of the soal bed on the ship course. The entrance is from Leightonnocent and injured women and routes, the new premises are of two Hill Road whore a characterist. girls recently completed on the storeys, coartructed as to main walls
5,000: Fathoms, chlly designed gateway give. a Leighton Hill Road, is a credit of brickworks on a reinforced Chinese atmosphere. Beyond this, alike to the energy of the Institu- cement soncrete base, the foors and the approach is by stops and rópad,, tion's Chairman and Committee; to roof being of rainforeld coment con path to the central doorway which, the subscribers who have so genar crece surfaced with tiles *
MODERN PRESSURE FILTRATION PLANT
WORLD'S LARGEST INSTAL LATION FOR TOWNS
WATER
CAPACITY OF 12,000,000 GALLONS IN 24 HOURS.
Great interest attaches to a pre aure Altration plant in England for the County Borough of Halifax at Thrum Hall Lane, which is the largest in the world, the contract price having been, £80,000, and also represents the latest British prac-, tice in this important field.
The installation, completed during 1931 and now in full operation for towns water supply, consists essen- tially of 84 standard "Paterson? pressura Alters, 0" diameter, hay-
:
heon, that the catchment area' is
and one of the troubles has SOUND CONCRETE. largely moorland, giving strong discolouration due to peat, which, of "course, cannot be removed by
simple Altration The methol adopted, therefore, with this new plant at Thrum Hall Lane, is to
THE NEED OF CLEAN AGGREGATES.
in
When concrete building was treat with alum and lime, giving its infancy many builders and co a flocculent precipitata of alumina, tractors failed to realise that the which entangles avery trace of use of sand and shingle of any but colour, followed by pressure sand the beat quality was to invite fai filtration to give is pure clear water lure. slightly alkaline in reaction. In this case the conditions are parti- cularly favourable for the pressurs method especially as it was con- architects raske th point of sidered undesirable to break the specifying existing bead::
in
dream of using poor materials, and At the present time no one would
bat only sharp mad and highgrade
The equipment of 84 filters is argake shall be used, complying ranged in four parallel rows of with a 21 filters each, with contral operat
gangways, in a main filter house 220 feet long, and 74 feet wide. Each filter is of the standard type ing a total of 5.340 square feetplied by the Paterson Engineer Bltering area, with a maximum ing Co. Ltd., of London, being
steel plate cylindrical shell 9′ 0′′ capacity of a rate of 12,000,000 gallons of water per 24 hours, along diameter of comparatively short with complete equipmeme for con
height with dish top and bottom, tinuous coagulation treatment by and
and independently connected to the menos of alum and lime.
raw water inlet main and the pure water outlet main, which are litted with the necessary control valves.
Discolouration.
Filtering Medium
dodnite specification. The Building Research Departinenc are: Continually stressing the need for using the best materials, and it is significant that the aggregates and and supplied by the Ham River by thom in Grit Co. Ltd. are used the tests and experiments which they are continually making in or der to report upon and improve the quality of concrete, used in construction work..
121
la general the Corporation of Halifax supplies about 0,275,000 gallong of water per 24 hours, which includes delivery to twelve Borough and Urban District Coun-on pebbles, and the cleaning is for the Battersea power-station, be
COMPLETE ELECTRICAL INSTALLATIONS
with
C. M. A. CABLES.
Advice and Estimates given
free on all types of
LIGHTING & POWER INSTALLATION
by an experienced,
ELECTRICAL ENGINEER
retained at our Hong Kong Branch
The General Electric Co. (of China), Ltd.
QUEEN'S BUILDINGS,
HONG XONG
It will be remembered, also, than The ditering medium in graded Ham Rivor materials were chosen Leighton Buzzard sand supported E
carried that by means of compressed cause the architect, and the air from two rotary motor-driven ginearing contractors kuow that the contrifugal air compressors, one quality could be relied upon. These | being a Kserve. In cleaning thê
materials are from the fresh-wares sand is agitated with the compress ed sir for two minutes to Honor Joposite which, centuries ago, were the entangled impurities, which are laid down in the reaches of the then swept away' to the drain. by a Thames above Putney, and although momentary reversal of the flow of in many parts of the country there filter is put back on the lime, the same sand lasting for years.
are sands and aggregates which are Thoah and lime congulents are as good, it is safe to say that in dissolved and afored in calibrated | no district is it possible to find any tanks with agitators, and the r which are superior to them, quired amount of standard solution
..Further, a is added continuously to the raw
most-up-to-date was water as it travels over the filters ing plant is installed at
each of by means of electrically driven the works of the suppliers, and the plunger pumps." All the incoming combined output is in the vicinity
raw water papac rough
30"
Venturi meter device, which both gives a record of the volume" of
of some 3,000 cubic yards per day.
water and actuates a mercurist dif-
forential gear which alters auto tive of the fluctuations in demand,
matically
1
Pract the upped of the electrip while every filter is also, «quipped motors driving the reagent pumps, with a patent Venturi meter de | In-thig Fionner any desired pro vice.
both the flow of the portion of alum and lime is always water during filtering and also that added to the few water, irrespoo of the wail water.
(Continued at foot' of next column.)
- DAVID. BROWNLIE.
The speed at which the pen erosso the paper or chart corresponds with a scale of 183 fathoms in §) înches.
J
Use Green Island Cement
for
Constructural Work of
Every Description.
HOW GREEN ISLAND CEMENT IS MADE
Green Island Cement is manufactured from bard limestone and clay. It is necessary that these materials should be finely ground in order that they may come into intimate contact with one another in the burning process.
The finely pulverised materials are mixed » in a certain definite proportion, roughly one part of clay to three of limestone, and are fed to the Rotary Kilns:
In these kilns they meet the hot, gases and flames generated by pulverised blown in
deed coal at the other end of the kilns, and after various chemical actions have taken place, they combine to form Portland Cement Clinker.
..#
The Clinker is ground down with a small percentage of gypsum to regulate the setting time, and Green Island Portland Cement is thus produced.
Although sounding so simple, in reality the process is an intricate combination of mechanical, physical and chemical operations, needing great skill and care. Nothing but constant and accurate supervision will yield the results o well-known with Green Island Cement, namely, strength, uniformity and reliability.
USE GREEN ISLAND CEMENT
Issued by the
GREEN ISLAND CEMENT CO., LTD,
2ND FLOOR,
EXCHANGE BUILDING."