او اله
Page
EVERYTHING S&C
ELECTRICAL
"Magnet ELECTRIC FANS
MADE IN ENGLAND
Price with Rod
£5.18.6.
Speed Regulator
15/6d.
KINGSWAY" CEILING FAN 56′′ Sweep.
Price with Rod
£4.12.6.
Speed Regulator 15/6d.
“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.
For further particulars please apply --- .
The General Electric Co.. of China, Ltd. Queen's Building, Hong Kong.
Shanks
& CO
4
LTD
BARRHEAD-SCOTLAND
HONG KONG DAILY PRESS, SATURDAY, OCTOBER 14, 1933.
ENGINEERING AND BUILDING
FLOODLIGHTING THE SURVEYOR'S
IN LONDON
Behind Other Capitals
Special Air-Mall Service
Sept. 29. Occasional floodlighting of aume prominent London buildings is said to be probable in the near future, according to "Parthenon," na" ar- chitectural journal. Some months
SCIENCE
Lecture at Engineer's Institute
THE KNOT & NAUTICAL
said.
MILE EXPLAINED
various activities.
..
TESTING STAIN- LESS STEELS
CHANGES IN AIRSHIPS CONSTRUCTIONS
Results Of Research In America
Akron, Experiments in the "chamber of winds of Guggenheim Airship Research institute here may bring about changes in a new airship should be constructed in with
Valuable New Mathod consussional committee's ro
commendations that the destroyed U. S. S. Akron be replaced.
In comparatively recent years the use of stainless steels in many to the tail structure of airships to The institute has turned its attention branches of engineering has ex- learn, if possible, whether increasing panded very rapidly. Various al- the number of fins might not counter- loys are employed in the construc-act effect of side winds rear the ground tion of all types of chemical plant. upon large surfaces such as the Macon
built with four fins-two vertical rud- Both the Macon and Akron were dors and two horizontal stabilizers.
these gusts. Smaller ships have been built in the past with five, six and even eight find.
circular wind tunnel, models will be suspended in the path of artificially generated winds, which can be made to travel sa fiat na 120 miles an hour. hollow cylinder suspended in the tun- Preliminary teata are with merely a nel opening.
In the institute's four-story-high,
از
"ground plate," or board, placed in Simulating the ground is a huge perpendicular position parallel to the wind direction, which is upward through the tunnel.
"
The varying forces exerted upon the
Pressure from the gauges is indicated oylinder are transmitted by wires which
operate hydraulic gauges. by the actuating level maintained in monometers and resembling the glass alcohol-filled glass tubes, known as gauges on coffee urns
Vanes can be adjusted so as to keep the air stream from fluctuating side- wise in the tunnel more than three-" tenths of a degree.
has, therefore, been given to the of fins will not break up the effect of study of the properties of stainless steels in the hope that it would be possible to establish 3 simple, rapid, and reliable method of de- NEW RAILWAY IN KIANGSI, length and will fan from Yashao
termining an index of resistance to corrosion.
Link With Chekiang And
Honan Systems
on the Chekiang border to Nanch- ang and thence westwards to Ping- siang from whence a line is already in operation to Changsha,
ago there was a plan to call 'a con- ference of all the bodies concerned surveying and topographical Sur-acids and other chemicals, for
A very interesting lecture од storage and transport tanks for and Akron. to dansider the financial aspect of the matter, But the quesion of the
veying was given on Thursday brewery
and dairy equipment, cost of the wiring and equipment evening at the Institution of En-equipment for ships, architectural stored in the way of practical dis- Kong by Lieut. Comdr. G. Hunately, however, it is not an easy these horizontal fins conceivably might gineers and Shipbuilders of Hong and decorative fittings. "Unfort
Fitful ground winds carling against cussion. Now there is some talk of Gandy, Retired). the cost being provided privately.
matter to determine the corrosion- have the effect of "bouncing" the rear The buildings suggested for illum-review of his subject the lecturer and the majority of
Opening with a brief historical resisting efficiency of these steels of the ship, and if the ship were near ination are the National Gallery,
the tests the ground in a landing or take-off available are rather slow and la- operation it might be damaged se the clock tower of the Houses of Parliament, Westminster Abbey,
In Egypt before the Christian bourious and do not yield results veraly, and Somerset House, London `al- era this demarcation was carried which can readily be interpreted
The Guggenheim tests aim to deter ready had a taste of floodlighting out by the priestly caste, which correctly. Considerable attention mine whether, increasing the number on these buildings when the Illum-thus included land surveying and inating Engineers Conference Wa the study of geometry among its held in London a few years 150.
It is curious how far behind Lon-
In Britain in Celtic times land don remains in enhancing ita night boundaries were marked perman appearance by floodlighting as com- ently on the ground by earthworks pared with other capitals Wash of the ditch and bank variety which ington has long had the dome of the present day remain in places For austenitic steels a suitable its Capitol and the Washington, to puzzle the pedestrian on the test method has recently been Monument and several of its other Wessex downs. It is interesting to evolved at the United States Bureau
of Standards. public monumente permanently note that air photographs show up
In these alloys, uminated Visitors to Paris know. many miles of these old boundaries can only be hardened by cold how the floodlighting of the obelisk quite clearly, whereas it was form-work, the iron exists in the non- in the Place de la Concorde and erly impossible to trace them out magnetic state and a series of ex- the arch of the Etoiles and the completely from the ground. periments were conducted to at- Opera House has quickened the
Later from about 600 A.D. the tempt to relate an index of cor- beauty of the Paris night scene, Saxon Bounds are actually describ-rosion-resistance with the magne- and particularly the magical effected in manuscript by place names the permeability of the steel. It is, got by the floodlighting of the two and reference to the points of the of course, a simple matter to de- termine the permeability of any fountains opposite the Comedie compass, such as on the east St, Francaise and the two fountains in Martin's Church: on the south the specimen steel by the usual ballis- the Champs Elysees.
road from Burgh Gate: on the weshtic method, but quite obviously and north Druting Street.
any method which requires spe- debts secured on the surtax on salt At the end of the year provincial Since medieval days conditions of cially prepared samples and can will have been paid off. This re- life and consequently the duties of only be applied in the laboratory leases 83,000,000 a year which will the surveyor have become increas-is of no use for making measure-
be placed in a sinking fund as se- ingly varied and complicated and ments on a completed structure.curity against a $12,000,000 bond you know what a laughing byena not now solely connected with the Such tests are, however, necessary Issue. It is estimated that the total land. The attempt must be made since the austenitic structure of cost of construction will be $20,000. therefore to classify some of the the steel may be partially destroy-000. various employments of the sur-
ed during the constructional pro- veyor at the present time.
cess. Further, under severe ..ser- vice conditions the austenite may be decomposed, and it is particu-
Paris seems to be able to afford these luxuries every night, although the holiday world no longer goes "to Paris in big numbers and is coming more and more to London.
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,
SHAMEEN,
SOLE ACENTS
CANTON,
For Constructural Work of Every'.
Description
Use Green Island Cement
WSERE 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
GEODETIC SURVEYS. To my mind the land surveyor
Nanchang, Oct. 3. In an interview with Reuter's special correspondent Professor Hsiao Shun-ching, Chairman of the provincial economic council, stated that next spring he expected to start work on a railway across Kia agai to link up with the Chekiang, and Ronan systems.
The line will be 570 kilometres
The rails are to be of 60 pound weight. Construction of the East- ern section will be undertaken by the Chekiang railroad and run in connection with their system until the link has been made with Naa- chang
General Chiang Kai-shek, Mr. Wang Ching-wei and the Executre Yuan have already givea their ap- proval to the scheme.
Teacher."Now,
is like 1."
William
do
Bill-"No, miss." Teacher. Then stop talking and look at me."
finds his highest expression in Geo- larly for cases of this kind that DOMESTIC ENGINEERS
detic Survey work where in the realm of applied science and in conjunction with the higher mathe matician and the astronomer his efforts are chiefly directed to the exact determination of the shape and physical properties of this world of ours; not decisively con- cluded as yet in spite of our being given the "agiom at a very tender age that the world is an oblate spheroid like an orange; informa- tion which we accept then with docility as a scientific dogma in which we see no practical interest whatever: an attitude which the practical man and the practical surveyor too is quite likely to take up with regard to Geodesy,
That mathematical laws govern the probability and propagation of errors in a series of observations, that the radius of the earth is not a constant, that the mean sea level of the various oceans
appears to differ slightly and that the existence of mountainous masses exercises Acme local attraction which often precludes the exact horizontal set- ting of a theodolite by means of its spirit level, is geodetic informa- tion which does not affect the quite Batisfactory practical results obtain ed by the land surveyor on purely local work.
Taking a wider view however, both in time" and space, we can envisage a future when the whole land surface of the globe will be covered with a system of accurate linear measurement between astro- nomically fixed points such as ob- sérvatorics. Geodesy will bear the important part of correlating these measuremente to the figure and dimensions of the earth.
the need for determining the cor rosion-resistance arises. A simple and rapid method would enable the works engineer, architect, or general contractor to check the suitability of any sample of stain- less steel at any time in the Eife of the structurë.
of measuring permeability in situ A study of several possible ways
SUBRCsted that the most promising was to measure the force of at- traction between the specimen and a permanent, standard magnet in contact with its surface. The ex- perimental model showed that with only minor modifications the instrument could be used to in- spect austenitic corrosion-resistant steels and would give satisfactory of the effect of terrestrial magnet- and reliable results. On account iam a singl emagnet must not be employed since the readings ob- tained would involve an orientation of the magnet with re- which vary in magnitude with the spect to the direction
earth's
error
of the
field. Two magnets of
equal strength were therefore used. being mounted colinearly in a hold- or with like poles together so that the resultant torque, due to the earth's deid is zero. The magneta in the experimental instrument are long and 5mm. in diameter. of cobalt magnet steel, each 5cm.
nautical mile the British Admiralty Knot is taken to be a speed of 6080 feet per hour, namely an hourly speed of one nautical mile measur- ed off Ushant in latitude 48" N,
HONG KONG MAPS
"
The following is a summary of Such work already begun, pro- the topographical mapping of Hong videa an object lesson. in interna-Kong and the Territories. tional co-operation. As long ago In 1845, a map of Hongkong as 1800 the survey and triangula-laland was made by the Royal tion of the United Kingdom, Bèl Engineers at a scale of four inches gium, Prussan and Russia was so to the mile.
far complete as to provide a chain In 1866, Lieutenant Collinson of measurement along the parallel made a triangulation and map of of latitude 52 N. from the West. the island. of Ireland to the Ural Mountains; In 1890-1904 Messrs. Tate and while at present a continental are Newland of the Surbey of India of meridian measurement is being with a staff of Indian surveyors carried out which when completed made a triangulation and map of will stretch from Lapland to South the Territories at a scale of two Africa.
inches to the mile They also pro Even if theory can be neglected duced a cadastral may of the culti the concrete data obtained by Geo-vated land in the Territories at a desy, in relation to the figure and scale of 32 inches to one mile or dimensions of the earth is of prae- 160 feet to one inch.
THE KNOT
tical utility to the surveyor, in the In 1900, Major H. S. King made field, unless of course he is merely a military map of part of the employed on the preparation of Territories and the Island at a amali local plans, 2
scale of eight inches to one mile.
Between 1900 and 1914, Military The lecturer explained with ad- mapa based on revisions of the pre- mirable lucidity those puzzling vious surveys were published at entities the knot and the nautical scales, of 21 inches and 4" inch to mile. The nautical mile has the mile respectively. Pub a length of 6046 feet mile at In 1924, however, a new survey the Equator. 6066 feet at Hong was carried out by the military, Kong, 8050 feet of Ushant at the the detail being obtained by verti entrance to the English Channel cal photographs from the air and and 8108 feet at the poles. (It is sheet maps of the island and Terri- arrived at by a somewhat abstruse bories published at scale of trigonometrical calculation.)
120,000 or about three inches to. As it is impracticable to construst the mile. price H.K.85 per sheet. speed recording instrumente tor There are 24 sheets in the complete gurter the variable length of the series
undertake
OXY ACETYLENE Welding
as well as
ELECTRIC
14
Welding
Lowest quotation with Expert Workmen
Welded Tanks in all Metals & Speciality. WORKS--449 & 41, Lockhart Road, Tram stop off Bowrington Canal. Tel. No. 28304.
Stored-Up Breezes
to Bring You Comfort!
Hor, stifling days hold no terrors for
those fortunates who own a Westinghouse Electric Fan. Stored up in it are thousands of hours of cool, delight. ful comforting breezes just ready for you at the snap of the switch.
Trim, tireless and silent in operationa Westinghouse Fan gives many years of ithful service and costs but a trif to operate.
OBTAINABLE FROM ALL
PRINCIPAL ELECTRIC DEALERS
Westinghouse
Sole Agenta-
REISS, MASSEY & CO., LTD.
י'