HONGKONG TELEGRAPH SATURDAY, JUNE
HOLIDAY TRIPS.
Complete arrangements made for, tours of North China, Korca, Japan, including steamship and rallway tickets, Hotel and sleeping car reservations. Sight-seeing, with native guides, etc.
Other holiday trips arranged to the Philippine Islands, Jaya, Indo-China and India,
Baggage and Accident Insurance.
Carry American Express Travellers Cheques.
Other Offices in the Far East-Shanghai, Tientsin, Poking Kobe, Manila, Calcutta, and Bombay. Representatives at other principal pólats.
For complete information apply THE AMERICAN EXPRESS CO... Inc. 4A, Dos Voeux Road, Contral.
'Phone 0.4625,
DUBARRY'S HIGH CLASS PRODUCTS Characterised by Daintiness and Charm, Bath Crystals, Soaps, Perfumes, Poudre, etc., etc... The Hall-mark of Quality. New Stocks constant- ly arriving.
THE COLONIAL DISPENSARY.
14, Queen's Road, Central.
Telephone C. 1877
TUCHER BEER
The Well Known Brand Obtainable.
THE WING ON CO., LTD.
ASAHI BEER
BREWED BY
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TOKYO
JAPAN
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Sole Agents--
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HONGKONG
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A WONDERFUL FLAVOUR WITH THE FULL TASTE OF THE CHERRY,
SOLE AGENTS:---
CALDBECK MACGREGOR & CO., LTD.
15, Queen's Road, Central
Telophone C. 75
One of the most treasured possessions of friends far `away is a photo of their dear ones overseas. The Ming Yuen Studio is fitted with the most modern photographic equipment and will be pleased to show you specimens of their work.
THE MING YUEN STUDIO (Battery Path.),
Official Photographers to the "H. K. Telegraph.
TO WORK IN COMFORT DURING THE DAY. AND REST IN COMFORT DURING THE NIGHT."
USE
SKETOCIDE
of all
and quickly rid the Office and Homo.- MOSQUITOES. FLIES. SANDFLIES, Etc., Etc. SKETOCIDE kills all insects.
SKETOCIDE is pleasant in use
SKETOCIDE is nonstaining
THE
SKETOCIDE is nonpoisonous. PHARMACY
Asiatic Building, 26 Queen's Road Control Tel. 345,
Radio Notes & News.
13,
1925. (FEATURE SECTION).
the atmospherios heard in a wiro- | loss rocolver,bi
The investigations indicate that tho. potential of a light's ing flash may be as high as 100,000 000 Volts and that the quantity of aleotri- city involved may be of the orderof. 20 coulombs. The recent investiga tlona which Dr Smith-Ross is reporting indicato a very short-
Simple Set For Code And Broadcasts. (By Israel Klein for the Hongkong Telegraph.) Fans who like to read bodo, at 1 ball. One was the Kentucky time for the static crash-prob- times, may find interest in the Derby at Louisville, on May 16, ably about two one-thousandtha construction of the following re-and the other the Indianapolis of a second. This gives an amp, ceiver. It is built for both amin-Speed way auto race, on May 30, orage of about 10,000 amperes tour and broadcast wavelengths. Both wore broadcast by long and a radiation of some 20,000
This is the usual regenerative distance through WGN. book-up with untuned primary and tickler coil for regeneration. The parts needed are:
L1, antenna coil.
12, short wave secondary L3, secondary loading coil. L4, tickler coil.
sor,
kilometer-amperes, the averago height of the lightnight flash being about two kilometers, 5,000 SETS IN CHINA.
When one compares this radia- Despite China's slowness in re-tion with 0 kilometer-ampore, call.cognizing radio for broadcasting or less, characteristic of an ordin
purposes, thoro are said to be 20ary broadcasting station and with privately owned broadcasting 240 kilomotor-amperes attained by
whole country.
01, 0005 mfd. variable condon-stations and 5,000 listeners in the the largest prosent-day radio
C2, 00025 mfd. grid condenser with 1 to 2 mogohm grid loak..
C3, 002. fixed condenser.
*
*
THIRD BIRTHDAY.
station, it is evident that the wave sont out by a lightnight flosh may aasily be strong enough to disturb reception all over the world. Station OFCA at Toronto, cele-Some of the static crashes which R, 20-ohm rheostat for UV201-brated its third birthday anni you hear these nights may be vorsary with a triple programme, radio messages from some thun- which included all variatios of derstorm as far off as Australia music and other entertainment.
or Groenland.-Radio Manila.
A, or other hard tube; or 6 ohm rheostat for soft tube.
Two-point switch.
Ono socket, panel, binding posts, and other material neces- sary for completion of set.
Coil L1 consists of 10-turns of No. 20 DOC wire wound on a 3-inch thin dialectric tube. It niay be placed close up to the beginning of coil 12, or may be made variable with the secon- dary cuil, 80 as to permit of variable coupling
*
OLORIA SWANSON TALKS. The Marquise de la Falaise,bot- ter known as Gloria Swanson, is going to answer fifty intimate questions by radio, submitted by fans of station WGN, Chicago. It's one of the series, of radio interviews which WGN is con- ducting.
BATT
B BATT
This shows hook-up of simple set.
PILOTLESS BOMBER.
If this is doro, it should be placed on a shaft and within coil Wireless controlled French kom- L2, at the end opposite the tioklor bing planes in tests made recent- end. No definito instructionsly. One plane flew nearly 100 can be given as to exact coupling, miles and landed safely without because this depends on the 'a pilot. size and type of each aerial used.
Coil 12 consists of 14 turns of No. 20 DCC-wire wound in the sama direction as coil L1 and on à 34 inch tuba.
· MORE ABOUT STATIC. Lightning Flashes Heard Around World.
Coll 13 is the loading coil for
Those of you who have, won- broadcast wavelengths, It condered why you can hear the sists of 48 turas, No. 20 DCC crash of static in your receiver: wire also wound on a 34-inch without seeing a lightning flash tubo. It would be best to wind outside to correspond with it this on a separate tube and place will be interested in the result of it soveral inches from coil L2.·' some research work on the sub- The tickler, L4, consists of 18ject by American and English turns of the same wire on a radio engineers. 3-inch tube, and is coupled to the Last month Dr. R. L. Smith- end of L2. The leads, to plate Rose, the English scientist re- and phones, should be switched ported a great deal of new "data, for best results.
and the most important conclu~": sion which emerges from it is that lighting flashes are apparent. ly quite powerful enough to send
Whon the switch is moved to the tap 3. the secondary loading coil, L3, is short-circuited, and short waves are received. When out radio impulses audible in the switch is on tap L. broad-ordinary receivers clear. around cast stations may be beard.
*
BIG SPORTS ON AIR. Station WGN, Chicago, put its listeners in touch with two big sporting events, outside of base.
the earth. On the average, there is about one static crash per second audible in the ordinary sensitive receiver. The frequency of thunderstorms over the entire earth is sufficient, Dr. Smith- Rose thinks, to account for all
ACROSS THE SEA.
Amateurs in America assured themselves of daily. reports from the international amateur radio conference in Paris by sending their representative over with a complote transmitting and receiving outfit. Lloyd Jacquef, the lucky "ham" of the second radio district, is shown with the apparatus, low-wave receiver and 500-watt transmitter, with which he was to communicate from Paris with amateurs on the other side. The apparatus, was built by W. F. Diehl of 22V fame.
RADIO BALLOON.
The first ascent of the new radio-controlled balloon. Gradenwitz, at the Staakener flying field in Germany. The airplane which, controls its movements by radio is shown accompanying it,
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with
MBORDE
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Three Shades of Green
STOPS Dry Rot Decay and Destruction by White Ants
Tint Cards and Information from Agents
S. C. LAY & CO. Alexandra Building. Telephone Central 763.
WILKINSON, HEYWOOD & CLARK,
Shanghai.
Hongkong.
ELECTRO-PLATING
* OVER TWENTY YEARS EXPERIENCE in the Electro deposition of Metals in Hongkong plates us in a position ti offer reliable and efficient service for the plating of articles in Gold, Silver, Nickel and Copper,
Artistic finishes in Bronze, Antique Copper, and Oxydized Silver.
Polished and Lacquered Brassware.
William C. Jack & Co.,
Electrical Engineers,
Tel Central 358,
Astor House Bldg., Hongkon
Ltd
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THE GENERAL ELECTRIC
CO. (OF CHINA) LTD.
2, QUEEN'S BUILDINGS, HONGKONG. On Sale At
THE CHINA LIGHT & POWER 00'8. EHOWROOM NATHAN ROAD, K. SINCERE'S, SUN CO., WING ON, & ALL ELECTRICAL CONTRACTORS.