1923-07-18 — Page 7

GLAD TO KEEP 'EM RUNNING SMOOTH

Here's why our Main Garage and Service Station

succeeds in eliminating motor difficulties.

-We wash your car

-We store your car. ·

We vulcanize your tyres and tubes.

We carry a full line of auto accessories.

-We furnish the best Gasoline and oil pro-

curable.

-We carry a full line of Firestone Tyres

and Tubes.

-We repair and overhaul your car expedi-

tiously and efficiently.

Motor car storing and washing in our new

concrete Mala Garage and Service Station,

Per Month

Wong Nel Chong Road (Happy Valley), $20.00

upper end of Race Course.

THE DRAGON MOTOR CAR COMPANY, LTD.

Main Garage and Service Station.

Central 48% or 3350

CAMERAC

AND

Photographi Supplies

KODAKS

GOERZ & "ANSCO

IN ALL SIZES.

FILMS & PLATES

CAREFULLY

DEVELOPED AND PRINTED.

THE SINCERE Co, Ltd.

HEIDSIECK

Monopole Red Top"

$5.50 per qt.

duty paid Sold by

P. A. LAPICQUE & CO.

4. Queen's Bldg.

Tel. No. 950

THE HONGKONG TELEGRAPH,

RADIO NOTES AND NEWS

Wirekss as an Aid to the Police.

WEDNESDAY, JULY 18, 1923.

Police of New York will have no chance to alibi thom- selves out of blame for losing the trail of a motor car thief or other criminal. For the radio equipment on motorcycles ought to keep them in constant touch with headquarters whence they get the latest information on the movements of theft quarry."

the receiving instrumeat,

as

First actual attempts at what the future may rperience though Miss Case stood before the daily matter of course are at last, microphone in each of these stu- being undertaken in New York dios, instead of a distance up to That is, simultaneous broade sat- 900 miles aw 15. ing from several stations of are programme at different wave lengths.

are the figures given by. Mr. John Milla of the Westera eleotrio Company, in a recent issue of the Wireless Age" and it is beyond the imagination to corosive such a mass of ting particles all it motion within the confines of the small electric light bulb known_as] the thermionic valve. It is also stated that in each call of the storage battery molecules of lead sulphate form at the rate of ap proximately 25 thousand billion each hour that the flament circalt is complete. It is not to be supposed that the same electroos which leave the negativo plate of the battery traverse the complete circuit, re turning to the cell by means of the positive plate. While some of them may completa the whole! Journey, it is assumed that, at any rate, the same number of electrons reach the positive plate each second as start from the negative plate. Some of the electroas on their journey will leave the hot filament and become free eleotrons In the vacuum which exists inside the valve, but their place is filled by others from the various connecting wired acid frain:the flament.

Assuming that the wire employed is of copper, the path of the elestron stream will le through the copper stoms. Those atoms are each composed of s small number of electrons (29) to be exact) surrounding . minute positive nucleus or care, The formation of the atoms of the the filament depends upon material from which it is con- struoted. It is stated that each tungsten atom, for instance, is composed of 74 electrons oluster. ing round a unolens, which does not greatly differ from that of the copper atom.

The manner ia which the electrons are arranged about the positiva core appears to be doubt. fal, but it is known that the size ofį the electron in comparison to the distance which separates it from adjacent electrons le very“ small. When the electrical circuit is completed, some of the electrons clustered around the nucleus of That loaves the problem up to the atom are taflusuced to such telephone.engineers to solve. They an extent that they join the bilieve they have found the salu-electron stream. This, of course, atoms are The experiment is held fromtion of maintaining, the exact means that some Carnegie Hall, New York. bafora quality and strength of the valve left without their correct number members of the National Electric throughout its travels from one of electrons, and these atome re- adjust their correct balance from Light Assolation Miss Anna end to the other. Case, Metropolitan Opera HO- This they do by the use of cleo-other electrons passingin stream. The rate at which the indivi. prano, siaga before the assembly, tric equalizers or filters, scattered but at the same time her voice is at regular intervale along the dual electrons progress is very being transmitted by special long telephone lines. Their purpose is rapid, and it is this disturbance distance telephone to these four to correct the distortion of the and its effect upon the ators that radio broadcasting stations: voice through the lines, and bring hosts the filament. The effect on Weaf, & top the Asoling-build it back to almost exactly the same the plate or anode of the valve, ing in New York, operating on quality as when it was spoken which is, of course, charged post-

Lip into the microphone,

tively, is to attract the electrons. the heated: On the same lines, there are which have left special" repeaters" in the form of filament. vacuum tube amplifiers, to renew the currents to their original, or KOKA, the Westinghouse station af Pittsburg on 326 meters, even greater; strength. Thus the music of Miss Case arrives at] KYW, Westinghouse station in broad-casting station at Chicago Chicago on 345 meters.

with the same quality. and There seems to be nothing un-strength which she gives it in usual in this experiment since New York. the broadcasting stations are far apart and transmitting on differ- ent wave lengths, and since the voice is to be telephoned to their separate microphones. But there

492 meters.

WGY, the General Electric station at Schenectady, N. Y., on 370 meters.

The problem of transmitting a voice, especially music with its high range of noter, lios in the difficulty of preserving the quali ty of every note as it is sung

is a difficulty not so much in the The human voice ranges in pitob radio broadcasting as there is infrom approximately 100 to 5000 the telephone esrvice.

The problem herets to telephone the voice of Miss Case to New York, Schenectady, Pittsburg and Chicago without experiencing a tinge of lose in its timbro and quality. It must be heard through

THE MOUTRIE PLAYER PIANO.

IS

PERFECT IN EVERY DETAIL-EASY TO PLAY-EASY TO CONTROL CALL FOR DEMONSTRATION

Price $1600.00, Less 15 per cent. For Cash.

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BASEBALL POINTS.

Further Questions Answered.

QUESTIONS.

One-Is there any limitation as cycles & second. To maintain the to the weight of the bat that may Two-Is it true that the bat individuality of the voice the tile. be used in baseball? phone electric system must carry the complex sound within this used by Babo Rub weighs consi

derably more than that used by range with equal efficiency.

That is why the pr blem of any other player? simultaneous broadcasting is 0.18

Three-When a double header

for telephone engineers to solve,is played, which game is regarded rather than radio engineers. But as the regularly scheduled game this situation is not expected to for that day? exist for long.

Four-When an improper bats

In a few years, it is expected, man makes a base bit, and the concerta for simultaneous radioj mistake is discovered before an broadcasting will be seat from a other ball is pitched, what hap central broadcasting station on a pens?:

high ware length to subsidiary). Five-If the catcher interferes stations throughout the country with the batter when a runner on which will re-transmit them on third is trying to steal home, what lower wave lengths to the regular is the proper ruling? listeners within their territories.

ANSWERS.

This mode of broadcasting has already been tested and found One-There is no limitation as practicable, but it has not yet to the weight of the bat that gone as far as the plan of simul-player may use. He may suit his tasous broadcasting with the aid own fancy. of the line telephone.

ני

The Elusive Election.

Two-Ruth uses a bat that is considerably heavier than that used by most players. Cobb and When the fliment current of Speakor use bats weighing about the receiving valve is switched 37 ounces, while Ruth's bat on, the bigh tension battery con-weighs over 50 ounces. nected to the set and the instru Three Chefirst game is always ment adjusted, the electrons in regarded as the regularly sched the valve begin to beatir them-uled game with a double hender selves, says a writer in Popular on the boarde. Wireless. It is well known that

Four The proper bateman | the current which beats the Alament bas only a value of just always called out, when an act of under one ampere, and it is hardlyap improper batsman.ie discover conseigable that the heating ed a time. Tha improper bats- affect of this current on the filat man is removed from the bases.

ad inter meat is sufficient to disturb about Five-When a catchel boo 7,000,000,000,100,000,000 electrone feres, the batsman is sent to first, each second, in a wire having a and the runner trying to steal cross section of about 24 mil home in granted that base regard-

These Jess of what happe06. Honths of a square inch

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“RADIO EQUIPMENT OF EVERY DESCRIPTION. For information and particulars visit the

ELECTRICAL DEPARTMENT

of THE HONGKONG HOTEL COMPANY, LIMITED.

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Des Voeux Road, Centrai, Hole-Agenta for HONGKONG & CHINA,