1933-12-09 — Page 2

Page

EVERYTHING G.&.C ELECTRICAL

"Magnet"

ELECTRIC FANS MADE IN ENGLAND"

Price with Rod 125.18.6.

Speed Regulator

15/6d.

KINGSWAY" CEILING FAN 56′′ Sweep.

Speed Regulator 15/60.

Price with Rod

£4.12.6.

44

'KINGSWAY · · JUNIOR" CEILING FAN 44- Sweep.

The "KINGSWAY" Ceiling Fans are specially designed for use in tropical climates. They are practically noiseless and represent a marked improvement on any other alternating current ceiling fan hitherto produced." -

The

For further particulars please apply :--

General Electric Co. of China, Ltd.

Queen's Building, Hong Kong.

Shanks

& CO LTD

BARRHEAD-SCOTLAND

HONG KONG DAILY PRESS, SATURDAY, DECEMBER 9, 1933.

AND BUILDING

ENGINEERING AND

PUMPING PLANT

Erection of Emergency Plant

HOUSING IN BRITAIN

20,000th Municipal House Built

The prolonged drought Dani created great dimculties is secur- ing an adequate (water supply at various places throughout the country, and 'many emergency services have been brought into use. An interesting example of one of the latter is afforded by the emergency plant installed for the town of Macclesteld, by time. which the supply has been in- creased by same 70,000 gallons per day. To do this a site at Langley, about "three miles from the twon, was viewed on Satur- day morning, September 9, by the waterworks engineer, Mr. Ham-

Instructions of his

Committee

STEEL IMPROVES IN SHEFFIELD

Influx of Orders on

Home Account

THE USE OF WOOD FOR STEAM

century.

BOILERS

Modern Scientific Methods

a5

used

to

SUD-

A large amount of wood, and ever. and certain other wood. particularly refuse material such contain resins and simliar proT. ak sawdust, ahavings, bark, and ducts, which increase the heating small pieces, is being

value. throughout the world as fuel for Obviously one of the mala Sir Hilton Young. Minister of

steam generation, especially for difficulties of the use of wood as " Health, opening the 20,000th muni-

small boilers, but as a rule only a fuel for steam generation is cipal house built in Manchester,

Evidence of advance in steel, en poor thermal efficiency is being the moisture content, and some stated that more houses were now sineering, and related trades steadily obtained. Sawdust, for example. form of forced, as distinct from being built in British by private acros. In some sections progress is

is not an easy fuel to burn. and natural draught, is esential decidedly more marked than in others. enterprise, than at any previous While overtime operations are found in this connection also the car obtain an adequate rate of com-

a combustion. A house of the type needed for in certain branches, slackness and a bonisation of sawdust as

deficient demand pravail where differ-mercial proposition for the In this connection the "Tur- the lower paid wage-earner was

ent classes of products are dealt with. production of acetone, woodbine" hand fired forced draught being erected on an average for Thus it is evident that improvement is alcohol, acetic acid, and other, furnace is of great value, being 1, compared with 2296 when far from uniform. The most encourag products remains ar unsolved equally suitable also for any type. the house subsidy scheme was abo- ing feature, however, is that it is problem in spite of all the efforts of boilers, lished at the end of last year. becoming more general. Largely owing of inventors for nearly half a locomotive.

cylindrical, vertical. A total of 169,000 houses, were to the indux of orders on home

DT water tube and able to burn all kinds of wood. son, and in accordance with the built by private enterprise in the account, and the employment of steel twelve months ended in Septem- from Sheffield, and associated areas in

vegetable refuse Generally newly felled wood and general

material. the construction of a'dam was be. Der. In the same period, "49.213 place of material that was imported, taking an average through most

houses had been completed by lo- something like 11,000 more operatives common woods, such this point across at

Essentially the furnace, oak. the cal authorities

are engaged as compared with June or

poplar, elm. Fyegrave stream, which is fed by

Turbine Furnace July of last year, Internal organisation

chestnut, plied by the four springs on the hill-side. At nearing satisfaction, and, when it There is quiet confidence in

The demand to buy houses was is shown to be throughly sound. hickory, birch and willow. has. Co., Ltd; 198, Grays Inn Road, 10 am on the same day a Medi-

con- 30-50% moisture. -After a-12 London, W.C.1, has a grate made private enterprise sistent advance during the remainder months' air drying or "seasoning" up of large longitudinal hollow would turn its attention increas of the year, with a possible further the moisture content is reduced ingly to the erection of cheaper improvement in 1934 This, at least, to 20-25%.

cast iron troughs, side by side, houses to be let to manual work is the opinion of many of the leading being 5000-6000 British Thermal forced

the heating value zay-five in number, each with a ers

draught steam nozzle. organisers in the staple industries. Units of Heat per lb. Perfectly The surface of the grate, also "is Output of bulk and special steels" shows a steady rise. According to the wood also averages 49.3-50.3% composed of a large number of hydrogen. 39.5-42.5% oxygen, small and short transverse inter- last published official statistics, the

0.9.1.3% nitrogen, and 0.75-3.25% locking dotted firebars or "ele- Egregate production of this area over a month was 15,000 tona in advance of ash (this latter being variable ments" axed

across the top of the previous month. According to

and about 2-21 lbs. of seasoned the troughs. Further, these ele- Chamber of Commerce reports, wood is equal to 1 lb. of averagements have below a sloping pro Sheffield's working day output is 1,000 coal. The pines (conifers) how-jecting portion like the blade of tona in excess of that of the corresponding period last year. British engineers are buying raw and semi- In the armaments section, prospects manufactured steel much more freely. have improved considerably. Orders placed by British And foreign

guc

vane pump and the necessary valves and piping were ordered from Messrs. Mather and Platt, Limited, Park Works, Manchester 10. and arrangements were also made to erect an overhead line, so that connection could be made to the mains of the Macclesfield Electricity Supply Co., Ltd., about a quarter of a mile away." This por- tion of the work was completed by Monday morning. The pump, which is a 2-1 to 3-in model with a

capacity of 3,400 gallons per hour at 100 ft. head, and is driven by a 7-hp., 400-volt, 50-cycle motor

of the squirrel-cage type, running at from 1,400 m.p.m. to 1,500 r.p.m., and mounted on the same bed- plate, was delivered and installed | together with the necessary valves and suction and delivery piping within ten working hours, and was set to work on Tuesday morning, September 12. Since that date it

SANITARY WARE

MODERN SANITARY... “

EARTHENWARE APPLIANCES IN WHITE & COLOUR

THE JARDINE ENGINEERING CORPORATION, LTD,

(Incorporated under the Companies' Ordinances of Hongkong)

14, PEDDER ST. HONG KONG

SOLE ACENTS

SHAMEEN, CANTON,

For Constructural Work of Every

Description

Use Green Island Cement

WHERE GREEN ISLAND CEMENT IS MADE

́ ́A ́.... GENERAL

VIEW OF THE GREEN ISLAND, CEMENT - WORKS

TAKEN FROM THE SEA.

Issued by the

GREEN ISLAND CEMENT CO., LTD.

2ND FLOOR

EXCHANGE BUILDING

was sailed.

has run continuously. The stiction ine is approximately 22. tt., long and the delivery line 180 yards. At present, about 50 gallons of pure water per minute at 100 ft. head being pumped to the reservoir and filter beds of the town, whose

inhabitants, owing to the organisa-

concerned in this emergency in- tion and resources of all those stallation, are now relieved from

all

fear of water shortage, Engineering."

|

beech,

a turbine which dips in the blast current of air and steam in the

ponding to the particular aper trough below, diverting the con rect small volume of air corres-

ture. In addition for the forced.

for some time to come. There is also governments ensure consistent activity the likelihood of further contracts from several smaller foreign powers lacking big shipyards or large scale draught a fan can be used equal- steelworks. British railway orders are y well in place of steam jets, The big companies have which later do not take more

EFFECT OF TEMPERATURE developed manufactory within their that 24-3% of the evaporation

ON CONCRETE

How Strength Is Affected By Changes

own works, but the main cause of the of the boller, and circular grates stamp in this section is the striking of this type contraction in the export demand for vertical boiler. The generat are supplied for carriages and wagons. Markets that

Intense local

heat,

10

were taking large supplies of railway action of the forced draught is steel from Sheffied have ordered very to give an little for a considerable period. Good and because of this sawdust business is being done in boiler drums, other wood refuse, as well as big piston rings, automobile steel, and stainless steel. The last-named is being put to numerous new uses in the mediaz and heavy "engineering branches. There are prospects of sub- staintial development in this connec tion on shipbuilding account. Better conditions are reported from the lighter trades. Sales of tools oversazas

green vegetable products, such as bark, stalks, leaves, and seeds. -.. be burnt efficiently at a high with 60% moisture, or over, can

rate without pre-drying. Similar difficult vegetable material being utilised is the residue from

the extractions of alkaloids, perfumes.. dyes and tannins.

Cantieri Riuniti Dell'Adriatico

TRIESTE-MONFALCONE

THE STRENGTH OF CONCRETE ; able to conserve the heat evolved A pamphlet has been published during the process of hydration by the Department of Scientide in order to accelerate the deve and Industrial Research dealing lopment of strength. Ia mais with the influence of temperature concrete work where high inter-show a marked rise.—Engineering...," on the strength development of nal temperature may subsequent- Concrete. The subject is one ofly result in extensive contraction considerable practical importan- tending to the formation of ce both in reinforced concrete cracks the results, would seem to construction and in mass concrete confirm the desirablity of using work. In reinforced concrete Portland tements which have a work it is particularly desirable slow rate of evolution of heat. to have some idea of the extent When high alumina cement is to which the strength of the can- used every effort must be made crete is likely to be affected by to dissipate the best evolved as external temperature conditions. quickly as possible. Without this knowledge it is The effects of external temą. difficult to formulate rules of pro-perature on strength develop- cedure. In mass concrete workment are very marked with nor- recent observations have shown mal or repid-hardening Portland that the rise of temperature dur cement concrete, especially in the ing the process of setting and early stages of maturing. Harden- hardening may have & very ing is much delayed by cold, and marked effect on the "strength de- it is important not only to guard veloped in the interior of the against frosts, but also (to taki mass. It is only in the last few advantage of the rapid-harden. years that it has been realised ing properties of the cement) t that the expansion, due to heat protect the placed concrete if the hydration of the cement, follow thermometer is falling below 50 ed by contraction on subsequent degrees F. The effects of temper- cooling, has been largely respon-ature upon the strength are not sible for the detrimental cracks so marked as later stages, and that have been observed in large there is no very significant dif- concrete masses. In the United ference in the strength of Port- States special 'specifications call-land cement concrete after 28 days ing for the selection of cements with low evolution of heat have been enforced in the building of the great Hoover and Pine Can yon Dams.

when cured within the yearly range of temperatures likely to be encountered on the job. But with high alumina cement a con- siderable falling off in strength The report gives an account of

was found in the laboratory, tests investigations carried out at the when the concrete matured at Building Research Station during temperatures above 68 degrees F. the past few years into the effects Observations from tests extend- of both external and internal ing over a period of years. on high temperature upon the strength alumina cement concrete have development of concrete prepared shown that if proper precautions with modern types of cement. are taken to keep the. concrete These experiments are belived to cool during its early history good form the most complete examins results are obtained.

The very tion of the subject get

made. high early strength which is the The report includes an account particular feature of this type of of an Ingenious electrical method cement is not impaired in which the heat developed in a

Cases sometimes arise in using small test specimen of a concrete rapid hardening Portland cements setting in a vacuun fask is used in which very early strength, is a to cause a beam of light to fall matter of hours, must be assured, on a series of photoelectric cells.

as, for example, in marine work Through a radio valve amplifier le placing between successive tides, these operate electric heaters in or when the time available for water surrounding the vacuum the use of forms and shuttering Aask in such a way that the test is limited. Much can be done to plece is exposed to the same con- accelerate the stength, develop ditions as it would experience in ment, especially in cold weather. it was at the centre of a large by conserving the heat generated mass of similar concrete. The ap by the cement after placing, » by paratus also enables a number of providing adequate heat insuls other small test pieces immersed tion round the concrete or by in water to be put through the beating the materials and ap-. same series of temperature changes pliances when mixing and placing. as the original specimen. In this But it is inadvisable to preheat way the strength development of the materials when using high the concrete in the middle of the alumina cement.

mass may be followed by measure-⠀⠀⠀⠀ In hot cimates or in the hold ments on the small test specimen, of a ship cement may be at a DE EITECTS OF GOLD AB-fairly high temperature; on the The results of the study show other hand, a hard winter or a that in small members of Part cold climate may subject it to land cement concrete it is desir very low temperature. “

Shipbuilders, forge masters, electrical engineers, makers of the most up to date types of aeroplanes and seaplanes.

Tenders and designs submitted on request.

CENERAL AGENCY FOR HONG KONG AND SOUTH CHINA

PRINCE'S BUILDING, Sæd FLOOR

SHIPBUILDERS,

SHIP REPAIRERS, BOILER MAKERS,

FORGE MASTERS,

OXY-ACETYLENE AND

ELECTRIC WELDERS,

MECHANICAL AND

ELECTRICAL

ENGINEERS.

KONG.

LIMITED.

THE TAIKOO DOCKYARD & ENGINEERING COMPANY

________OF HONG KONG,

SALVAGE TUG "TAIKOO"

WIRNGESS CALL

--V.P.G.N. 800 METERS.

-DRY DOCK-

Length 787 Fest.

Length on Blocks 750 Feet.

Depth on Centre of

D

SII (H.W.O.S.T.) 34-It 6 las. THREE SLIPWAYS-

Capable of Handling Ships Up

to 4,000 Tons Dlaplacement

Electric Crane at Sea Wall. Capable of Lifting 100 Tons

at 70 Feet Radius,

BUTTERFIELD & SWIRE, Agents,

HONG KONG, CHINA & JAPAN.”

“TAIKODDOCK, Horo Köwn,”

CALL FLAG