1928-12-06 — Page 12

Shortest, Most Interesting Way to EUROPE

To the United States--

To Canada!

❤ Days Across

from Japan

STEAMERS

EMPRESS OF RUSSIA EMPRESS OF ABIA EMPRESS OF PRANOE EMPRESS OF RUSSIA EMPRESS OF ABIA,

The Traus Canada Eunited

SAILINGS. 1915.

Hongkong Shanghai Kobe Yokohama Van'ver Arrive LOVI Leave Leave Leave

14 JAIL. 25 Jan. 0 Jan. 12 Jan. 16 Jun Jan. 23 Jan. 26 Jan. 29 Jan, 31 Fel 9 Feb. 33 F 16 Fab, 19 Feb. 21 Mar. 2 Mar 14 Mar. 32 Mar Mar.23 Mar. 20 Star. 9

Mar. 28 Apt. 6 Mar. 20 20 Apr: 10

Apr 18 Apr. 27 May 4 May

23 Jan 1 EXPRESS OF ASIA

May 15 May 18 May 21 May EMPRESS OF FRANCE FA & Jan 8 June 11 June 13 Jung 22 13 4 July EXPRESS OF RUSSIA June 26 June 29 July 2 July

July 10 July 12 July 16 July 18 July 27 EMPRESS OF ASIA (E/A&E/Husris call at Nagarnki the day after departure from &`bni.}

16

EMPRESS OF FRANCE 10 apr. 13 Ap May Stay 15

EMPRESS OF RUHTA

Let a Canadian Pacific ugens or his representative sell you how attractive the Jhrough rates are and hure short, comfortable and convenient the route.

Canadian. Pacific

Pacifio Empress

The World'. Greatest Travel

Gystem

Atlantio Empress

American Express Travelers Cheques

Definition of TRAVELLERS' CHEQUES_→

"The system of Travellers Cheques was originated in 1801 by the American Express Company with the object of creating a form a travel currency which would give the holder the security of a letter of credit and at the same time the convenience of local currency, The Company registered the cheques under the trade CHEQUES namo of 'AMERICAN EXPRESS TRAVELERS' the world "Travellors" being spelled with one "L" The advantage of the Cheques was ao apparent that other banking institutions adopted the system,"

Quoted from Pitman's Dictionary of Banking by Wm. Thomson. Lasued in G$10, G$20, G$100 and £5 and $10 denomination- bound in a amali handy wallet and cost only 8/4 1 per cent. Secure your steamship tickets, hotal reservation and itinerarios; or' plan your cruise of tour through:-

THE AMERICAN EXPRESS Co., Inc.

4. Do Your Road, Central Hongkong,

THE SWEDISH EAST ASIATIC

COMPANY, LIMITED.

SERVICE OF FAST MOTOR VESSELA.

Louding Direct For

ROTTERDAM, AMSTERDAM, HAMBURG, COPENHAGEN, OSLO and GOTHENBURG.

THE HONGKONG TELEGRAPH,

MODERN WIRELESS.

MAJOR MILES' LECTURE ON

A POPULAR HOBBY.

THURSDAY, DECEMBER 6, 1928. -

which fually prints the message straight out

In order to make the received cur rent work the telephones, it has do bo. "detected"-that is, turned from a high frequency current into a lireet current rind "amplified," or increased in strength.

microphone, and from a variation of current back into a sound wave by means of a telephone receiver,

A simple form of telephone circuit comprising microphone calls and telephono is shown on the board

When no spooch in nccurring, steady current will flow from the cell through the microphone, along the line, and through the telephone. We may term this current the "carrier" current

When the microphone is spoken into, this current will be varied in strength, or "modulated," by reason of the alterations in resistance of the microphone caused by the voice.

Whenever the wireless wavo strikes a conductor suck as an aerial These operations are performed by wire, it tries to start a current flow. the Receiving Valve, whosn appear ance will be familiar to anyone who ing in it as a wind tries to net trees slanking-the netion being the recitas had any dealings with broadenst

receivors.

We have now scón that a wireless procal of timi which originated the wave: what I mean is that an oscit wave is created by a very rapid latory movement of electrons in un vibration of electrons in an aerial normal starts the wave and the ware wire: that a free wave in emitted tries to start an oscillatory inove which spreads out over the surface of the earth: that the wave on strik- ment of electrons in all the conducing another aerial wire tuned to respond to it produces & similar This is where the question of tun-rapid vibration of electrons which, ing comes in.

being, suitably treated by a wireless receiver, will produce a steady olecrior current. trio current.

tore it encounters

You may have noticed that when a piano is played, some vase ur other ornament will ring out whenover a This is particular note in played, because the piano note coinsities with the natural note ur frequency

of the vaur.

trick of

I believe n' favourite Caruso's was to pour some water into a wine-glass till it gave a certain note when capped, and then sing that note and matter the glass-by reason of the powerful vibrations not ar in it by his voice. He tunest the wineglass to the wavelength or fre- quency of his note by pouring the

water in

A Wireless Receiving Circuit, like the Transmitting Circuit, comprises combination of inductances and condenser whoso valves can be al justed by the receiving operator until thus eirenit responda hout readily to thy wase he wishes to receive: he then gets a maximum of response

332 from that ware, and a from other waves of different length

He merely turn various handles in an intelligent marer, and hears signal fit from one station and then from another, until he finds the station he wands.

The suguni is nuade perceptíbig the senses generally as a sound a pair of telephones, but it may be mails to produce a mark on a piece of tape or a Frasitical photographie film or a record on a dietaphone, or even to operate a relay mechanism

SHIPBUILDERS.

We now wish to see how the WAY mukt be maltreated in order to affect one of the human senses and convey a mouning.

Three Forma, This may take one of three forms: Marso Telegraphy, Radio Telephony Television

Suppone fur example that n tuning fork tuned to the middle is sounded near the microphone, then n wave of frequency 250 vibrations per second will be impressed on the cat-

The current varintiona, passing through the telephone, will move the telephono diaphragm and the note of the tuning fork will be reproduced. The same principle is involved in wireless telephony.

A continuous high frequency car tier wave in omitted, which, when "detected in the receiver, is turned into n steady current.

By means of a microphona tho!

speaker varies the The first is easy. The wave in voice of a chopped up into long and short im-strength of this wave at the various pulsen by the sender with a morse antiblo frequencies that go to make key, and produces long nuit short im- pulses in the reaniver telephones short and a long meaning "A," a long and 3 shorts "B," and so on.

Morse is invariably used when a message hins to be recorded, as it can be sent and received as fust as man can write, and more aerurately than a message dictated by tele, phone.

The science of wireless telephony is of great interest on account of the

and importance popularity brondenating, so I will give a brief acest of huw it is done.

أن

In the first place you should under stand that the human voice does not travel as a sound wave from the mouth of the speaker to the ear of the listener anymore than it does in the ease of fine telephony,

specchi, and in consequence the telephone in the receiving sirenit re- produces the speech,

So in England every night the ether is set in vibration by numer

carrier waves-the Various us

nut ta interfere with each wavelengths being carefully chosen so na other-and the voices or saxophone mulate the carrier waves which La reproduced as speech or jazz.

(To, hè Continued.)

LETTER GOLF SOLUTION.

Herb is the solution to the puzzle on another page.

BLACK, SLACK. STACK, In live telephony the speech is turned from a kound wave into a STALK, STALE, STILE, SMILE,

14 SMITE, SMITH. variation of current by means. of

SHIP REPAIRERS. BOILER MAKERS. FORGE MASTERS.

·OXY-ACETYLENE AND ELECTRIC WELDERS.

MECHANICAL AND ELECTRICAL ENGINEERS.

THE TAIKOO DOCKYARD & ENGineering compANY

OF HONGKONG, Limited,

J.

THE

BLUE FUNNEL

LONDON "DIOMED" **HEOTOR"

"PERSEUS"

LINE

REGULAR AND FAST PASSENGER SERVICES

FREIGHT AND

SERVICE

11th Dec. M'ler, Londen, R'dam & Hamburg 24th Deo. M'los, Lonton, R'dum & Glasgow

Bth Jutt. Mica, London, B'dam & Hamburg

| Calls at Chrablanda.

LIVERPOOL SERVICE

"QLAVOUR"

TYDEUS PACIFIC

2011 Dec., 2011: Jor

Gorms, Havre, Liverpon! & Q'gow Genoa, Havre, Liverpool & G'gow

SERVICE

Victoria, Vancouver & Brattle Victoria, Vanenavir & Seattle

via Kobe & Yokohamos "TYNDAREUS" 13th Dec. "PROTESILAUS“ 3rd Jan. NEW YORK SERVICE "EUMAEUR** INWARD SERVICE

111 Jan. New York, Boston & Baltimore

Fur

Due "TELEMACH US" 7th Dee. Shanghai, Kobe & Yokohama "PHILOCTETES", 6th Dec. Shanghai, Moji, Kobe Yokohama PASSENGER SERVICE

*--HECTOR" "AENEAS

*Sals at Daylight.

24th Dea

Kingapore, Marilles & Loulen 2nd Jab. Singapore, Marseilles & Londen

Aino cargo ateamers with limited paascuger accommodation at specially reduced fares,

For freight, passage rates and information apply to m

BUTTERFIELD & SWIRE,

A genus

M.V. "DELHI

M.V. "CEYLON"

Loading about

19th Decembor

20th January

24th December

Agents.

SHANGHAI, JAPAN PORTS and VLADIVOSTOCK.

M.V. "CEYLON"

For further particulara apply to tho

GILMAN CO., LTD.

Hongkong,

M

MESSAGERIES

G. E. HUYGEN.

Cunton

M

MARITIMES

FRENCH MAIL STEAMERS.

Sailings from Hongkong.

To MARSEILLES vía Saigon,

Singapore, Colombo, Djibouti (Aden) Suez, Port-Said.

PORTHOS,

18th Dec. CHENONCEAUX... 1st Jan. ATHOS II........ ..15th Jan. D'ARTAONAN ..29th Jan. 12th Feb. SPHINX

G., METZINGER... 25th Feb PAUL LECAT...... 12th Mar. ANDRE LEBON... 26th Mer.

To YOKOHAMA via-Shanghai

& Kobe.

ATHOS II. 18th Doo. 'D'ARTAGNAN... 1st Jan.

SPHINX....

15th Jan: G. METZINGER... 20th Jan. PAUL LECAT...... 12th Feb. ANDRE LEBON... 26th Feb. CHENONCEAUX... 12th Mar. 26th Mar. PORTHOS....

We can issue through tickets to Egypt, Syrian ports, East Africa, Madagascar by tranehipment on our mail atearers at Port-Suid or Djibouti.

COMMERICAL LINE.

From DUNKIRK Hamburg, Rotterdam, (Antwerp)":"

YALOU

For full Particulars, apply to:-

16th November.

Cie. dex MESSAGERIES MARITIMES,

8, Queen's Building.

Telephones: C. 851 & 740,

-DRY DOCK-

LEHOTN 787 FERS,

LENGTH ON BLOCKS 780 PRET

DEPTH ON CENTRE OF

́SILL (H W.Ó.S.T) 34 FT. 6 INS.

-THREE SLIPWAYS— CAPABLE OF HANDLING SHIPS UP TO 3000 TONS DISPLACEMENT. ELECTRIC CRANE AT SEA WALL, CAPABLE OF LIFTING 100 TONS AT 20 FEET RADIUS.

BUTTERFIELD & SWIRE, Agents -

HONGKONG, CHINA & JAPAN.

"

BANK LINE LTD.

ACENTS FOR

ELLERMAN & BUCKNALL S.S. CO., LTD.

SAILINGS SUBJECT TO ALTERATION WITHOUT NOTICE. UNITED KINGDOM & CONTINENT

May

ELLERMAN LINE

9th Dec

9th Jan, 9th Feb.

"CITY OF MOBILE" London, Rotterdam, Amsterdam & Hamburg **CITY OF LAHORE"... London, Rotterdam, Amsterdam & Hamburg

"CITY OF MADRAS” London, Rotterdam,"Amsterdam & Hamburg... * PanBooger Steamer, Taroa to London: 1st Class £80; 2nd Class £85,

NEW YORK, BOSTON & BALTIMORE

“CITY OF CHESTEN”

AMERICAN & MANCHURIAN LINE via Buos Cans)

27th December.

ALRO AGENTS FOR

KE

ANDREW WEIR & CO.

BOSTON & NEW YORK

เ

AMRBICAN & ORIENTÁL LINE

HELVIORS TO

•

***

via Buez Canol ...

K

"LEVERNBANK" MAURITIUS & SOUTH AFRICA

"TINHOW"

a

*** Yo

ちゃ

ITE

bot MAT

11th January ORIENTAL AFRICAN LINE

ה

9th December

Loading for Mauritius, Reunion, Delagoa Bay, Durban, East London, Algos Bay, (Port Elizabeth), Mossal

Bay and Capetowa Through Bills of Lading leaked to Beira; Quilimaine, Iho, Port Amelia, Mozamique, Ubinde, Inhambane,

Zanzibar, Momhuss, Kilindini, Port Nolloth, Luderits Bay, Walvis, Bay and Madagascar."

For freight or passage on any of the above lines apply. Telephone Central 4701)

THE BANK LINE, Ltd.

~President Liner

SAILINGS

Weekly Trans-Pacific Service

To San Francisco and Los Angeles

To Bestile and Victoria

The Sunshine Bolt pia Honolula The Short, Straight Routa to America

Fortnightly sailings on Tuesdays Fortalahdy sailings on Tossdeya Pres, Madison ... Tass., Doo, 18th Pres. Clevoland True., Doo. 11,8 m. Pres. Jackson... Tue, Jan. 1st Pres. Pléres ... Pres. MeKinley... Tues., Jan. 14th Prer Taft Pres. Grant...

... Tum, Doa, 25th Tues., Jan. 8th Tue., Jan. 28th Pres. Jefferson ... Tue., Jan. 21st

£120, £112 Special enrough rates to Europe via United States. Direct

connections with all Atlantic lines. Chalce of rail lines across United States and Canada, liberal scop-over privileges for sight-seeing

Europe and New York Direct

ROUND THE WORLD

Fortnightly callings on Senday via Manlin, Straits, Colombo, Buez Canal, Alanovich Napins, Genoa, Marseilles, New York and Boston Pres. Monros Ban., Dec. 10, 8.m. Pres. Hayos...Ben, Jan. 27, 6 a.m0,* -

...8an, Feb. 10, 8.m Pres. Wilson Bun., Des. 30, 8 a.m. Pres. Polk Pres, V.Baron Buu., Jan, 13,8 a.m. Pres. Adams Bun, Feb, 24, 0a.m. To Manila

Pres, Madison... Dec 8, 6p. Pres. Jaekton ... Pras, Monroe... Dec. 16th, 8 a.m Pres. Wilson Pros. Pleros... Dec. 18th, 6 pm. Pres, Taft ...

Dec. 22nd, 6 p.m. Don 30th, 8 B..

Jan. 1st, 6 p.m.

For Bookings, Passonger and Freight Information, apply to 12; PEDDER STAKET, (opposite Hongkong Hotel.) Telephones Contral 2477, 2478 & 795. Cable Address **Dollar."

CANTON BRANCH :-No. 4 Shakee Street.

American Mail Line

and

Dollar Steamship Line

AUSTRALIAN-ORIENTAL LINE, LTD.

#

'Changte" & "Taiping,”

THESE NEW VESSELS MAINTAIN A REGULAR SERVICE FROM HONGKONG TO AUSTRALIAN PORTS. VIA MANILA, AND THURSDAY ISLAND Through Bills of Lading issued to all Australian, Now Zealand and Tasmanian Ports, EXOELLENT & Most Up-ro Darn Finer & Broom Clara PaburnokR ACCOMMODATIES. HONGKONG TO BYDNEY-19 PAYS.

BTAMER

CHANGTE *TAIPING

CHANGTE:

Τον Πανακότα

7th December

4th January

8th February 8th March

DUN TO BATL

TAIPING "Calle at Iloilo.

14th December

11th Januniy

15th February

15th March

For Freight & Passage, apply to—BUTTERFIELD & SWICH, Tel 0.38

Agents.