IMCLARI
Leaders
THE CHINA MAIL,`` THURSDAY, NOVEMBER 10, 1945.
ENGINEERING PAGE You can Speed up a job like this
in their ENGINEERING PROGRESS
Class
OF DAIRY MACHINERY
Automatic By A. THOMAS GILLING
DIESEL Ionospheric ENGINES Recorder
for
ALL STATIONARY
Every hour of every day, sta- tions all over the world trans- mit radio waves to the ionosphere and record the echoes back to the earth's surface.
The information obtained makes certain that broadcasting stations, the fre-
& MARINE DUTIES ships and aircraft use
Engines bearing these Inter nationally famous names are doing splendid service through; out the world on land and sea.
There is a size and type for every duty. They are supplied in a convenient range of powers from 13 to 1,440 B.H.P.
Sole Agents;
ARNHOLD & CO., LTD.
HOLLAND HOUSE HONG KONG
Chubb & Sons
Lock & Safe Co., Ltd.
Available ez stock as illustrated.
THE JARDINE ENGINEERING CORPORATION LTD.
14-10 PEDDER STREET, HONG KONG
TELEPHONE 803111
Milk production in Britain has increased by leaps and bounds over the past nine years. It has been accomplished with less land available for cattle grazing than ever before, for the need in World War II to produce ever-in- creasing quantities of wheat and other cereals has continued into the post-war years and has made it necessary to plough up more land in the United Kingdom than at any time within living memory. :
quency bands giving the best re- This has been possible only by making the utmost use of machinery in all aspects of dairy farming.
ception at the right times. In the same way as a mirror reflects light, the ionosphere, high above the earth's surfice, reflects radic waves and makes long distance short wave radio possible.
the
of
ka
First, the all-important task of where current is necessary were milking cow'S is being done by devised, and the lightweight com- If the ionosphere did not exist. | machine at unprecedented pact units known today were all his findings transmitter rate. Milking machines in use in-based originally on waves from a would fy oft into space and the creased by 8,000 in the United of how useful the practice could listener in, for example, the Union Kingdom between January, 1946) be. South Africa or Australia and January, 1948, and the rate
The latest developments of would not be able to bear the of increase is being maintained.
really light weight portable plantį British Broadcasting Corporation.
Secondly, housing has been capable of dealing with from two There are two main layers in "mechanised"-or in other words, to a dozen or more cows at each' the ionosphere. One, the Heavi-has been better planned for more milking, include some mounted on side layer, is about 60 miles high; convenient and economical milk small pneumatic-tyred trolleys the other may vary in height production. The biggest single or trailers and one can even be from about 150-300 miles. Both cost in milk production is that of carried about by hand complete chiefly because the labour-so the more suitably a with its own small petrol engine. ionisation of the upper atmosphere dairy is designed for best use of
Makers of he Best include. Gas-- by ultraviolet radiation from the available labour, the greater the
coignes of Reading, Berkshire, sun, and the amount of ionisation saving.
England; the Simplex Dairy will therefore vary with the time
Such planning is not confined Equipment Co., Ltd., Cambridge, of day, the season, the position. OVET the earth's surface, and merely to extracting milk from England; Vaccar, Ltd., Christ- with the sunspot cycle of about the herd; it also includes such church, Hampshire, England; and 11 years.
matters as making the disposal Alfa-Laval, Brentford, Middle of manure from shed or yard to sex, England-and the portable a field as easy and rapid possible. "hand-lifted" model is made by R. J. Fullwood and Bland,, Ltd., fodder Thirdly, home
pro- Ellesmere, Shropshire, England. duction has been speeded up by All those mentioned, too, produce the use of every suitable machine larger scale plants for any size
installation.
occur
of
A these variations affect the ionosphere's ability to reflect the! radio waves, and they have to bej taken into account when deciding what frequency should be used for short wave broadcasting.
At Slough, England, the Radio Research Station has been carry- ing out experiments for the past 25 years to discover as much as possible about the behaviour of the ionosphere.
the
Important Aparatus
known
Reliable Milking Machines
Tubular-framed complete port- able milking machine waits for large numbers of cows have been successful
overseas, such units can be towed behind tractors- Milking machines made in Bri- or even passenger cars to work- faint and exported-to-all-over-ing-sites whereves required. They seas countries are among the are made in Britain by Gas-
An important piece of apĮ most reliable pieces of mechanism coignes of Reading, Berkshire, paratus used for this purpose is engineers have ever devised. England.
Automatic Ionosphere Re- They have to, be, for cows have' corder. It consists of a trans to be milked at least twice a day The original open-air bail mitter and receiver, constantly in places far from engineering or system developed by Mr. Hosier in tune with each other. Radio repair shops.
carries even more equipment than waves sent out by the transmil-
the more milking machine Com- ters, sweeping through a
Types produced in the United pletely mobile models have been quency band of 0.55 Mc/s to 25 Kingdom embody the best
of made embodying sterilising and Mc/s (corresponding to wave- British, American, and Continen-cooling plant, and stalls in which lengths of 12 to 550 metres) in tal practice,
tre-1
and have
and the use
been cattle are tied and fed. Makers
a fey minutes, are echoed back proved over years. Some which are Hosier Inventions Lad, and by the ionosphere. The echoes! were installed more than a Salopian Engineers Ltd, Prees, are displayed by the receiver on quarter of a century ago are still Shropshire, England a cathode ray tube, and photo-giving good service.
Another novel approach to the graphed.
During the years, however, problem, long used by Britain's From the photograph thegreat Improvements have. beer farmers is a cable drawn fork heights of the layers and ther incorporated
of guided by an operator and work- density can be determined. These stainless steel and aluminium, anded by Z small petrol-engined photographs are
and obtained every improved pulsator pump winch which loads muck on to a
make hour at Slough, the other stations | mechanism
modern conveyor for delivery.. to any of Britain's Department of machines remarkably trouble-vehicle for taking to felds. It is Scientific and Industrial Research free. Installations on farms in made by M. B. Wild and Co., in Scotland, the Falkland Islands Britain range from huge plants Ltd, Pall Mall, London, The and Singapore, and about 50 milking several hundred cows, to number of manure loaders for- other similar stations all over popular types dealing with fewer ward-mounted on tractors 75 the world. The results of such than 10 cows-and some models legion and most tractor-makers measurements are exchanged. have even been made for milking supply, OT can recommend
From all these observations it is possible to forecast the be haviour of the ionosphere for
(Continued At Foot Col 4) ..
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"CHATWOOD":
"Asbestos Cement Producti.
Bollers, Domestic.
-Copper Tubes & Fittings.
Cement Colouring Powder. Cement Waterproofing Powder Electric Water Heaters. Expanded Metal,
Fire Places.
Fire Fighting Equipment.
Insulation: Heat, Cold & Sound. Ozone Generators.
Oil Cooking Ranges.
Oil Burners, Fully Automatic, Oil Burners, Range. Plugging Materials. Pumping Equipment. Radiators, Oil Loaded Electric. Rubber Flooring Tiles. Windows & Doors, Metal, Vault Doors & Safes.
DODWELL & CO., LTD.
MACHINERY. & CONTRACTING
Shanghai Bank Building.
Hang Kang
DEPT
Telephone 21123
goats!
Most striking, perhaps, in re- cent years has been the advance of the portable unit for either shed or field, use,
models.
Within the dairy, one of the most valuable of post-war pro- ductions in increasing use is the compact refrigeration unit, com plete with petrol, or electric motor, for cooling milk.
The ball.or outdoor-machine] milking system was introduced in Britain by Mr. Arthur Hosier Such units are being produced (Hosier Inventions Ltd. Wex- combe, Marlborough, Wiltshire, small types use the same water in all sizes. Most popular of the England) and has spread every-
and repeatedly
their greatest where where cows are milked value is where natural water is mechanically.
scarce often the case in out- His experiments on the open low cost unit of this type are of-the-way places, Makers of a spaces of Salisbury Plain where treeless fields, up to
Refrigeration.(Bletchley) Ltd a' square mile in area and at several hum-Buckinghamshire, England, and
another manufacturer dred feet in altitude, -convinced
.is.. the
him that the only answer to milk Wolseley Sheep Shearing Machine production under conditions Co., Ltd, Birmingham, England.
duplicated im many overseas countries--was to take the machine to the dairy herd.
*
He did so most successfully. Portable milking machines.com plete with engines to provide power and generate, electricity
some time ahead. Predictions" of wave- the best frequencies or lengths to use for communication i and broadcasting are complied six months in advance and issued to the Post Office, Cable' – and Wireless, the BBC, and many other authorities in Britain and overseas,
The BBC, for example, user These forecasts to decide when the frequency of an Overseas transmission should be changed: to get the best reception in the country aimed at, and ships and aircraft know" in advance what frequency band to use for the best communication
The automatic Ionospheric Re- corder was shown at "Radio- lympia-Britain's National Re- dio Exhibition at Olympia, Lon don-This month, and
METALLIC LIQUID
WITH
GALK COLDE
¡ORBON
Lillington's
SAI
NO. 1 METALLIC LIQUID
This Liquid is a rapid hardener and at the same time produces a waterproof, hardwearing and dustless concrete. These properties were utilised to the full in the construction of aerodromes and Government factories during the war. The use of Lallington's No. 1 Metallic Liquid enabled -Service vehicles to carry supplies over the previous day's
concreting, thus speeding the job considerably.
NÒ 2 METALLIC LIQUID-Waterproofs exterior brick- work and affords complete protection against heavy rains In exposed positions.
No. 5 METALLIC LIQUID-Makes concrete floors water.
and dust proof.
roots and
No. 6 METALLIC LIQUID–Repairs | leaky
41
terraces.
PAINTCRETE—For exterior decoration. Outlasts distemper and lime wash. -SOLD UNDER GUARANTEE Sole Agents:
MANNERS ENGINEERING LTD.
Mercantile Bank Bldg.
Tel. 34174
Westinghouse
Fresh Stock Just. Arrived!
Deluxe
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Plate Warmers.
ADMIRAL Refrigerators (8 & 10 cu. ft.)
TAYLOR Barometers, Humidiguides, Therm meters, Wet & Dry Bulbs, Aftemeters.
NICO Ceiling-lighting Fittings.
Ask for & Demonstration At
U. SPALINGER & CO., LTD.
ENGINEERING DEPT.
Showroom
3A. Wyndham Street Next to S. C. M. Post Bldg. TEL: 32785.
REFRIGERATORS
DAVIE,
BOAG CO., LTD.
SHOWROOM:
"ALEXANDRA BUILDING,
· TEL: 26862.
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