1931-05-23 — Page 2

HONG KONG DAILY PRESS,

SATURDAY, MAY 23, 1931.

Use Green Island Cement

for

Constructural Work of Every Description.

HOW

GREEN ISLAND CEMENT IS

MADE

Green Island Cement is manufactured from hard 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 Kilnв.

In these kilns they meet the hot gases and flames generated by pulverised coal blown" in at the other end of the kilns, and after varlous chemical actions have taken place, they combine to form Portland Cement Clinker.

The Ciinker is ground down with a small percentage of gypsum tó regulate the setting time, and Green Island Portland Cement is thus produced.

J

Although sounding so simple, in reality the process is an intricate combination of mechanical, physical and chemical operatione, needing great skill and

Care. Nothing but constant and accurate supervision will yield the results so well-known with Green Island Cement, namely, strength, uniformity and reliability.

USE GREEN İS! AND CEMENT

Issued by the

GREEN ISLAND CEMENT CO., LTD,

2ND FLOOR,

EXCHANGE BUILDING.

EVERYTHING.

The

G.&.C.) ELECTRICAL

your guarantee!

FOR THE HOME

WITH ELECTRICITY

HOUSEHOLD

"Magnet"

An

example from the complete range of

Household Electric Appliances

Irons Kettles Toester Cleaners Fans Fires Washing Machinet Cockers. Grillers Appliances for the Toilet etc

ELECTRIC

APPLIANCES

- MADE IN ENGLAND by THE GENERAL ELECTRIC

CO. LTD... Sola" by all leading. Electrical

Dealers, Storis, Sta.

"Magnet

Pedestal Heater Supplied with yds.

flexible cord, and B.C.adaptor.

ENGINEERING AND BUILDING

THE VITAL IMPORTANCE OF STEEL

IN INDUSTRY.

WIDE RANGE OF APPLICATION OF HIGH GRADE

PRODUCT.

INFLUENCE ON ENGINEERING PROGRESS.

Buch steels

CANADA'S GREAT SHIP CANAL.

TO CONNECT LAKES ERIE

AND ONTARIO..

ducts are extensively used in sheet and strip form in airgrafé construe Toronto, Canada.-Built to con- tion, and are fast replacing parts,

neet Lake Ontario and Lake Erie, Their previously made' of wood. resistance to. atmospheric effects and

which have a difference in level of the action of salt water, combined | 3833 feet, and to form an intégral with the mechanical properties in virtue of which they can be harden-connecting link in the great system ed, tempered, and easily machined, of inland waterways which stretchos makes them ideal materials for from the Straits of Belle Isle many of the parts of flying boats

through the St. Lawrence River and The temperature of the products the Great Lakes 2,050 miles to Engineering progress to-day is iron and steel metallurgy, Nickel of combusion-for example, those more dependent upon the develop has come to be an essential con- of the internal-combision engine Duluth, on Lake Superior, the Wet- ment of special types of steel than stituent, though not in large pro-calls for steel which shall cuable tand Ship Canal is approaching upon any other factor. This is a portion, of steels which show ex- valves to resist the intense heat of completion. Eight huge locks, remarkable change from the days cellent corrosion-resisting and heat-working conditions

among the largest in the world, are when wrought iron was the chief resisting qualities,

must not distort or scale easily or material of construction, and steel

The 'modern swift methods of became pitted by the action of the provided, to move ships across the was used only for tools and cutlery.

transport, by motor-car or aeroplane

Niagara Poninsula to escape the celebrated Niagara Faile, and by For the real beginnings of the have been as much indebted to present industry we have to go back metallurgical research us to any Specialisation to a high degree is the end of May vessels up to 450 to the middle of the eighteenth other factor, and these special alloy also called for in the production fect and drawing eighteen feet of century. Huntsman, a watchmaker, steels enter into the make-up of of different varieties. One of these developed in 1742, what now. con numerous parts each of which is meets the conditions imposed by the stitutes the crucible process for the called upon to withstand the more heavier type of internal-combustion manufacture of the highest grades severe stresses. Absolute relia-engine, while a special high grade of steel. His immediate require- bility, combined with high strength in manufactured for the valves re- ment was a uniform steel suited to to weight ratio, is the essential, and quired for aeroplanes, racing sulo- manufacture of watch springs. The nickel steels are being used in in mobiles, and motor-cycles. process, which has not undergone creasing quantities in all forms of mach change since his time, consist- automobile and aircraft construe! ed in melting a mixture of cemented tion. steel with best pig-iron and bar in

stream of burnt gases issuing from

the cylinders."

CHINATOWN IN L'ONDON.

(Continued from Pagë 1.)

name is false, for Pennyfelds and the Causeway are not in Limehouse at all: they are in Poplar. Fame has been the death of it..... When ladies And gentlemen smiling awarm out of coaches and run all- over the place trying to buy opium as souvenirs, what can poor Vien dó but fly to more congenial scerecy It has flown. It would be more appropriate to-day if the conches To London's Underworld” started from Linichouss to the West End instand of from the West End to Limehouse.".

The police assured me that the opium traffe in Limehouse" is That practically stamped out. scons to be true. The tragedy of Billie Carleton, the actress, some

years ago was followed by term repressive measurea. When Brilliant Chang, the notorious drug agent, was arrested and deported, tho traffic was broken..

water can be accommodated,

Brilliant Chang, who is now The new canal is the fourth to be blind, lives in Shanghai, and I was The first told that he still corresponds with built around the Falls. was constructed in 1929 as a pri.friends in the Causeway and Penny. vate enterprise, and shortly there. after taken over by the then pro vince of Upper Canada. That one and two others in turn were out-

fields.

Gambling gives the police more trouble than opium. The game of Puk-n-pu was described to me, Squares of paper containing 40 num-

such proportions that any desired entions of nickel steele are to be which are called upon to withstand grown by Inke traffic which increases bera, 20 above the middle line and.

quantity" of carbon could be obtain ed in the product.

Newer Processes,

Dio stamping Requirements.

Quite a different set of properties Excellent examples of these appli. Are required in the case of steels found in the famous cars with which the imphet resulting in die-stamp world records have been achieved, ing. Freedom from the possibility In the late Sir Henry Segrave's of cracking or distortion under Golden Arrow, several general types heavy and suddenly imposed pres- of nickel steel alloys were embodied, aures is hero essential, Steels are with differences in treatment de-now produced which take very fine signed to meet the exceptional con- designs accurately and with which

distortion in negligible.

This process has throughout that long period been insed for the pro- duction of large quantities of steels of the highest qualities, though the|

ditions imposed. individual crucibles in which the operation is carried not usually Moreover, the use of nickel in hold not more than, about 60 lbs, steels has been considerably ex- of metal. At the present time, how-tended where ease-hardening is ap sver, it is employed only for those plied, the many advantages of the high-quality types in which the process easily offsetting the high small quantities used are not neri- ously affected by the high cost.

ing, improved mechanical proper High-speed steel is a modern protics, a smaller proportion of rejects, duct of the crucible process, as are a better finishing surface, and a the more ordinary carbon steels re more gradual transition between quired in relatively small quantities | " ense

and cere." for the production of razors, fine drill, and taps. To-day the best tool steels are still made from the cru cible process.

initial cost. These advantages in clude reduced and simplified queuch-

For hot stamping, high tungsten alloy steel for both ferrous and non- ferrous work are available. They are particularly resistant to wear at high temperature and require only very simple hent treatment.

A special variety is also manu- factured for making moulds.for

bakelite and other plastic materials

process known as hobbing. The hob, which is the positive master dir, is made a special alloy and is hardened and polished. The steel after treatment is very hard and An Epoch-making Advance,

has sufficient abrasive qualities to The addition of chromium ta stref withstand the enormous pressure re- In course of time the lower grades as another epoch-making advance quired for the hobbing operation. in metallurgy. While the layman The hob is then forced by bydraulic of steel for constructional purposes

is more familiar with the various pressure of over 100 tons per square came to be produced by the newer procenses evolved by the genius of forms of stainless steels, the engin-into iato a blank of mild steel of Besserer and Siemens, who inventeer is more concerned with the ad-dead soft quality to produce a mega- ed methods of purifying pig-iron in dition of other desirable properties tive impression. In this way it is the fluid form by means of com-to that of non-corrodibility. The possible to produce many moulds pressed air and iron ore. More re-fundamental, properties of these from one master hab. Among the cently the Siemens process has been steels are their resistance to the no variety of articles produced by adapted to the production of higher tion of the atmosphère, food acids, there moulds are electrical and, certain mineral acids, sea water and wireless components, switch knals, grades of steel.

The most recent methods of steel humidity generally. Their uses are and tuning dials, and attention is 'production is that used in the manifold, and under present condi- now being directed to the pro various types of electric furnace, in tions their production holds a com-duction of ornamental household which the higher temperature remanding position in the steel in articles. quired for many of the moderndustry.

The products are of different forme of alloy steels are more easily obtained. Other advantages are the grades. One of these is especially

4

Engineering Tools,

But these special steels do not absence of, the impure gases given euitable for the manufacture of by any means exhaust the list now off from the combustion of fuel and machine parts which have to be available for engineering. produc the production of more fusible slags, hardened and tempered and to tion. For all types of turning toola, which provide the chief medium fer possess absolutely regular physical twist drills, reamers, cutters, and the elimination of the impurities properties. Such a materia! is suit-toolholder bits, high-spred ster! with able for the manufacture of cutlery, a tungsten content of from 14 or from the metal.

surgical instruments, and articles 18 per cent. provido a tough, close- requiring a cutting edge and per-grained material which stands up to. In this country, however, the ap- mitting of hardening. The idea continuous heavy duties without the plication of the electric furnace is that stainless steel is unable to held need of frequent regrinding.

Carbon tool steels with the carbon restricted by the relatively high a cutting edgo is entirely discredit-

Nickel Steels,

cost of current, which can only be ed in the production of the pre-ranging from 0.05 to 1.0 per cent, recovered on the special qualities sent-day steels.

of steel which are used in limited quantities in modern engineering producte.

•

steadily, and the situation demand- Led provision of the complete facili

ties offered in the project now near-

ing an end., Work on the new canal was begun eighteen years ago by the Dominion Government. It was suspended during the years of the Great War, and resumed on a large scale when hostilities ceased. "The total cost will be about $130,000,000. The length of the canal is 25 miles from Port Weller, on Lake Ontario, to Port Colborne, on Lake

Erie.

20 below, are given out; each player may, oblierate 10 numbers of each 20; the squares are then compared with the obliterated number of a paper held by the bank "; if m player has 10 numbers right he gets. his money back, but 11 right brings him quite a large return, 12 an even larger, and so on,. It depends on the amount in the bank " und his

original stake. A stake of only ed.

can win as much as £40,

"Charlie Brown's."

The liveliest spot in "Lime- house," in the upstairs bar of the public-house near West India Dock The former is an artificial Gates affectionately known on all harbour formed by the construction the coasts of the world as Charlie Brown's," au extraordinary place of two huge embankments nearly a mile and a half into the lake, while by reason of the curios that hang at Port Colborne a breakwater of like a pendant forest from the cell- 2,000 feet had to be built for pro-ing or stand round the walls- tection against gales, At Port spears, skull, stuffed heads, bows Calborne is lock No. 8, which is and arrows, assegnis, native cary- 1,390 feet between the inner gates.ings, idola, shields, figures in bronze and ivory-pl kinds of rarities and anid to he the longest lock in the world. A vessel can pass brought by sailors from many parts through the canal in eight hours.

of the world. The downstairs bar is similarly adorned, and "Char- lie's private collection of ivories is very valuable; but upstaira thero

A LITTLE

is

care in setting up en advertisement often doubles its selling power.

It is that little extra thought and care, which given to every advertisement drawn up in the office of the Hong Kong Daily Press, which brings good results.

are serviceable for many purposeя, Another variety is a stainless, those with higher carbon content non-magnetic, austenitic steel which being limited to tools 'not subject is the high-water mark of stainlessed to severe shock, Hammer-zeto, Among the many metals which steel production The tendency to dica, pneumatic tools, rivet snaps, have provided additions to steel harden when being worked cold is vice-jawa, broaches, cams, mandrils, nickel must be accorded. a pro definitely less in this material, and shear blades, chisels and engrav- minent position. In the early days it can be welded easily by eithering tools are a few of the applica Chris addition was employed in the the electric or the oxy-acetylene tion of these grades of steel, production of ormament steels, but process It is used for forgings, For automobile, aircrafty locomo- more recently it has contributed castings, plant for the chemical in-tive and marine engine components properties, derived partly from its dustry, and pump work, and it sup and a large variety of genera en composition and partly from heat plied for many purposes in the gineering products, alloy steels con- treatment, which have largely trans- form of bar, sheet and strip, taining nickel, chromium and vana- formed its sphere of usefulness from

dium are available, while for pro destructive to constructive purposés.

cision tools much ae taps, dies, and In every department of engineer- In another direction, vif, sore-gauges, non-shrinkable steels suffer- ing this clement is found in the nautical construction, special grades ing very little change in volume numerous types of steel required of stainless steel gro being develop during the various treatments of of the casential materials for en to exhibit, properties the like of ment to meet the stringent require manufacture ara at the disposal of -which........could...never have been menta.and.specifications imposed by the engineer.

dreamt of in the early days of the Air Ministry. These newer pro-1 (Continued at foot of next column.)

Aircraft Construction,

is also a piano, and the middle floor in given over to dancing.

It is generally crowded, and you may stay for a whole fascinated evening studying the varied types of a stratum of East End society hardly to be seen with auch free.

dom elsewhere. There are coloured men as well as white among those who dance to the strumming of the tireless individual at the piano, who doffs his collar when the atmosphere gets too hot; and the girls, atrik. ingly arrayed, with hair wonderful to see in its amazing varieties to modish arrangement, revel in coemo. politan admiration,

King of Limehouse. Charlie, the uncrowded king of Limehouse" as they call him, is n burly, genial man getting old now, but hale and handsome, and very proud of the fame of his ivorica, which, as his visitors' book testifies) has been admired by people in all ranks of society, from the King of When I was

Buch are some of the develop. Spain downwards. ments arising from research both there a bunch of German tourists in the laboratory and in the solemnly surrounded him, and some works in order to repeat on the Americans with their expensive what ean be ladies were peering into the dancing production stale achieved on the experimental: To bar. this progress it can be justly claim- It seems a pity to "blow" on the td that the metallurgists and steel Limehouse underworld" delusion! makers of Great Britain have made It brings innocent profit to the Tha the most conspicuous contribution. Causeway and its purlicus. Its pioneering work in every stage. Chinese signs and shop'names have of steel development has gained for a certain picturesqueness. You can this country a world-wide reputabuy curious, interesting things there tion and placed it in an enviable position in regard to the provision gineering constructional work of the highest standard. London Daily Telegraph.

uncommon little china bowls arid pattern (the grains of rice make decks of transparency when tho ploco is held against the light); quaint chinaware figures: China tea; for tick and gingar in pleasing Chi

dishes in the ancient Chinese rico

nese jars.