1928-01-31 — Page 10

10

BIG SALE

THE CHINA MAIL,

RADIO TOPICS

TUESDAY, JANUARY 31, 1928,

DAILY CROSS-WORD PUZZLE.

(This cross-word puzzle has been made by an expert but our readers are warned to look out for occasional phonetic spellings, such as harbor, plow, and altho.)

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SEND YOUR FRIENDS AT HOME.

THE NEWS

OF

THE

WEEK

AND WHEN YOU GO HOME KEEP IN TOUCH THROUGH

THE OVERLAND CHINA MAIL

WEEKLY EDITION OF THE "CHINA MAIL" -

Published Every Friday at No. 5, Wyndham St.

(Telephone Central 22.) :

A REGULAR BRITISH SERVICE.

RADIO. SCIENCE.

Messrs.

RADIO WAVES.

HOW OBSTACLES_DISTORT THEM.

INTERESTING FACTS.

These

are

Considerable interest has been A day of reckoning for radio

Large structures or natural fea "pirates" and. "programme taken by both the Press and the bures in the path of radio waves twist. amenrers, and of hapo for some public in Empire, Broadcasting, and them so as to alter their dinetion. In some instances these objects may twenty million "listoners-in," is while the laurels for the most auc-even net na secondary sources

of said to have dawned when President cessful transmission of European pro- endintion. The Washington Monu Coolidge signed the new Itadio Con-gramme appear to rest with a Con- ment has been found to function ini

this way.

Receiving instruments trol Hill. For ever since a Supremetinental station, it is ventured to hear it may be turned to the monu- Court decision, deprived, Secretary predict that ore long, regularment's wave-length instead of to Hoover of his job as aerial traffic British servico will be established that of the original sourse. cop in claurge of wave-lengths, the with the more distant parts of the and other interesting facts

brought out by recent government radio line run wild, new broadensting Empire.

tests described in "The Radio Age" stations springing up like tonali

8. G. Brown, Ltd. (New York) by S. R. Winters. Mr. roos and filling the ether with so though the energetic efforts of their Winters actos that trees, bridges, nany conflicting and over-lapping agents, Mesars. Noyen Brothers embankments, streams of water, vibrations that the result to the lis (Pty.), Ltd., Melbourne, have pro-water towers, and other surrounding trolley lines, valleys, large screens, toner was becoming something very [vided us with 'some most interest objects are likely to exercise a dia. like chaos.

Because one of the jing details of the manner in which torting influence on radio waves. main purposes of the new law is to these transmissions Inve been re- Any of these objects, when inter- posed byween the transmitting reduce this chaos to order, Senator [ccived and relayed in Australia.

station and your radio receiving set. Dill, who helped write it, calls it

The reception froin Europe any cause the wave to deviate from the Alagna Carts of the radio lis (Holland) was effected by an Igranicits true course. He writes:- taners"';' mud "the press generally

**When enils of wire are employ ed as radio dirvation-finders,” tho welcomes it with grent expectations.perheterodyne set, near to which

was the Microphone of the BLO distorting To the man in the street, it con.

effect of surrounding (Melbourne) Brandensting station. objects must be systematically stitites the most important legisln. Before the Microptione and connect-avoided or the causes included in tion of the session," says the fed to the receiving set, was the direction-finding exlculations.

The Radio Laboratory of **Washington Post," which predicts vital link of the whole chain--n Amt millions of Histones-in will "Brown Q" type Lond Speaker. Bureau of Standards is called upon The clarity of the rely thus trans- to make tests to determine the remember the Sixty-ninth Congressmitted by 310 was such that many twisting influence of radio waves as as the one which "cleared the air." " jof the thousands listening to the enused by objects interposed in ther In this law "Congress has heeded | programma, could scarcely believe path. The Lighthouse fervice, the wishes of a united nation," ro- that the transmission was not with its radio beacons, inay request uvurks the "Washington Star"; and actually A stunt feature being per- of the Bureau assistanco in deter this nuanimity of denund it explains formed in the studio of 3LO as part mining suspected deviation of waves which would invalidate the effective. of their normal programine. by the statement that "radio fans

Messre. 8. G. Brown, Ltd., are neas of direction-finders in taking the country over have had their setacertainly living up to their reputa. [ bearings from ràdio byneons. Again, rendered practically useless by the tion. First in the field in their par the Coast Guard, in its recent uncontrolled and unregulated broad-tienlar braneli of radio science, they adaptation of radio direction-finders A prominent in trading rum sinugglers, may need esting stationsThem will beure once again pinyng joy in the art and music in the part in what, it is ventured to sug to know if the shore-line of a river gest will in years to come, be look or a concreto bridge is undermining cent of the radio fan, for whom the el upon na ni historical event. The the directional characteristica

of periemance of the Loud Speaker these direction-finders. present winter has been one much suffering," says the Toledo was worthy of the firm whose name For the dies it bears; firm who have uncens gentlemen of the radio audience" itingly and unflinchingly usintained their ideas of quality and relability; fruntis escape from the bedlam by adapting their methods to the

entised by competitive "juuping**

required conditions, by adopting a uf wave-ngths remarks the Phil-rm and consistent policy and by im- and Morris S. Strock negotiated this adelphia Evening Public Ledger"i proving wherever and wherever pos- study for the Federal Government, and the New York Times" rejoices | Lible, Ley infle the mutisfaction of exploring into the secrets of trees, at this promise that "the great, ish-knowing that their reputation is re-bridges, banks of rivers, valleys, and | sven_andieners**_nre soon to be re-sugnised all over the world, and is trolley lines.

aened from aerial clmos.""

Scrious Defects.

There are pessimistic commenta- tors, of course, who think the law bristles, with serious dufgets, but in the emin it is regarded by the press

safeguarded by the dependability of their products.

the

of

**These suggested services, toga-: - ther with the ever-increasing appli entions of the radio direction-finder, place added emphasis upon investi gations wouducted by the Radio Francis W. Dunmore Laboratory.

ha

A

**Even the Wnahington Monu. ment, towering in silent majesty to height of more than 500 feet, did not escape these government sciont- ists. And stranger than fiction was the revelation conxed from this en- as a long step is the right direction. may be financially interested in the during shaft of marble. It not only 'natural wave-length--about The chief complaints of its critive manufacture or sale of radio ap- are that it fails to proclaim, the na-paratus or in the transmission or 025 meters-but when KAA, the tion's "ownership of the air." there-operation of radio-telegraphy, radio- naval station at Arlington, is broad- by leaving the door open for private telephony, or radio brondiensting. costing on 2,500 meters, the Wash- interests to claim vested rights in This commission will classify all ington Monument is, in effect, a certain wavelengths; and fint it radio stations, assign lengths to the secondary radio transinitting station. tuales no povision agninat charging various chusses of stations, deter "It is interesting to note that when for listeningin, orqagainst patented ning the location of classes of the Arlington station was trans- devices for this purpose.

stations, or of individum stations, mitting on 2,500 meters, the sigrials The new law supersedes the ralio make regulations deemed necessary could be heard on about 800 meters: [Faw of 1912, which was enacted to prevent interference between Observation showed that the monu- fore, the development of broadenst station, and make special regalament was the source, thus indicat ing had brought the present-pro-tions applicable to stations engaged ing it was set in oscillation at the

lens into existence. It is a roses in chuin brandensting,

third harmonic of the Arlington promise measure, combising certain "The eorumission in ale vested wave, and was thus radiating into features of a flouse bill fathered by with muthority to make general the surrounding region.

Natural Wave Length. Hepresentative W. H. White (Rep.). Trudes and regulations requiring

12,

13

16

17

底

537

54

58

HORIZONTAL 1-Prefix From 4-A great city of

France

8-To be able

11-A specion of palm 13-Encountered 14-Walking stick 16-A river of Austria add, Hungary

17-Not counterfelt 1-A small weight

(abbr.)

19-To multilate 21-Prefix Back 23-8panish. for "alt" 24-To indita 27-Musical..wind.

instrument 30-Conjunction

31-Pol A form of

**ad"

32-A town in N. W.

Canada

| HORIZONTAL (CARL) 141-Roman goddess of

agriculture

10

146

52

159

THE INTERNATIONAL SYNDICATE.

VERTICAL (Cont.) 10-Franch for "born" 12-Graad street (abbr) |14-Cubic [abbr.)

16-A tyas moature (pl.) |20-Asssalato of Arts

44-Father 145-Certain 46-Egyptian eun god 48-8nce-mandor |60–3uffx——$1ving a

horror of 83-Adherent

1

54-A familiar forgat

tree

06-An Istana of the

Cyclades group, Grasca

147-Not principal or

main $8-Unclouded 69-Xenophan (abbr.)

VERTICAL

*1-Gonjunction

\*

(abbr.)

22-Facsimile 24-Interjection. Pahaw 23-Epochs 26-Strength 28-Ev)!

29-Jacob's brother

、igible}

31- orroded

133-Peziosolve pronoun

3-A river between

Malns. U. S. and Canada

38-To hunt with gray-

hounde

40-Black

2-One of a large clu 42-An Island possession

of U., S. (abbr.),

of animals

3-A bird

45-A month (abbr)

34-Famous mountain in 5-Part of verb "to be" 44-Profix.

N. California. 36-Man's name

(familiar)

37-Aurum (shem, sym.)|

39-To boll stovily 40-Prefix. Same as

"super"

Many

-Ablty of Saskatchs-145-An' aquatie mammal

wan, Canada

7-A Aewspaper

paragraph

B-A heap of stones

a memorial

B-Girl's name

47-Competent

48-A, wheeled vehicle

49-Preposition

51-His Majesty (abbr.)

52-Vast period of time 186-Interjection

SUGGESTIONS FOR SOLVING CROSS-WORD PUZZLES

Start out by filling in the words of which you feel reasonably sure These will give you a clue to other words crossing them, and they in turn to still others. A letter belongs in each white space, words starting at the number-squares and running wither horizontally or vertically or both

(The solution of the above cross-word puzzle will appear in to-morrow's issue along with a new eroka-word puzzle.)

YESTERDAY'S SOLUTION.

STAB CUP WALL SOMEGAGATONE T OR TERN IRON GO LAW TAPERED DAM ODOR MELEE CAMEC IRIS RED GLUE SIMPËR CARABLE

N

PRACTICES BEREFT | TAPPED MARS ROT TEAR MISS TENOR DIRE ATE CHASTEN DS SEAS TEAS IO PUNTOS EDITS

RANT NOR LYRE

RE

Reims (NTLEMITIDAN, STINGATIA

proaching the shore-line at an anglo of 500 degrees, is not distorted ap- preciably.

A concrete bridge, if it contains iron reinforcements, is apt to bend radio waves considerably. The

Radio Laboratory placed its portable direction-finding equipment on 150-foot reinforced concrete bridge. This text showed large angles of dis- tortion, attributed to the iron roin- forcements of the bridge.

This

or more) from any such tuned cir

uit.

"Experimenta with the coil aerial, an integral unit of a radio dircation- tindor,, directly under a 100-foot wire antenna, T5 feet overhead, fail- ed to produce any distortion when the antenna was tuned or untuned. This antenna was stretched at an The conclusion that trees cause inglo of 15 degrees with the line to deviation of wave fronts, prompted the transmitting station. However, the Bureau to focus its direction when the direction-finder was placed finder around a tree, in an open field.near the lead-in wire, the incoming was radio waves evidenced # markedt While the transsnitting set Bending on wave-lengths of 400 and deviation. Very little, if any dis- 1,400 meters, there was a negligible tortion existed with the antenna un- of nine, with other fentures of a statens to keep such records of pro- Testa near the moment indicated amount of distortion in front or be tuned, observed Dunmore. Senate bill sponsored by Senator C. grandnes, Traustuissions of energy, that the greatest distortion of the bind the tree. However, when the shows, le emphasizes, 'the import- CHill (Tom), of Washington, cemtuunications or signals ma it ming wave front was at 625 ineters, which coil antenna and receiving set were ice of keeping the dirvation-inder This Dill-White bill, while was deem proper. Under the new fowled to the conclusion that this is the placed to the right or left of the tree, at a considerable distance (100 feet victed by Congress on, February; 'pienting of waves' will be unlawful. (natural wave-length of the shaft. the radio wave deviated so much as 18, and signed by President Coolidge Changes in wavelengths, authorised Signals were sent from a special five degrees. Radio experimenters

'As a result of these observa- five days later, is summarised in power, charnster emitted transmitting station at the Softiers might pursue this line of investign.

tions,'' summarises. Mr. Dunmore, follows by the Washington corres sigmls or thues of operation of Home, on a series of wave-lengths, tion with interesting results.

Radiation.

it appears that there is lustion pondent of the New York Times. any station can not be inade unless from 400 to 1,000 meters.

"If broadcast listeners reside in or radiation from most metallic in the judgment of the commision direction-finder was stationed, Rue- Radio Commission.

such changes will promote public cessively, at much of six positions at the vicinity of a water-tower, this objects, so that a radio direction- "Under its terins the measure convenience or interest or will were increasing distances from the monu- form of atructure may prove to be finder placed. in the immediato

Sone of the observations the

of radiation of radio vicinity gives an erroneous indica- 'shall take effect and be in force public necessity" or more fully con-ment, upon its panange and approval, ex-ply with the provisions of the new showed pecular twists of the radio waves a sort of secondary broad- tion of the direction of the trans- mitting station. The magnitude of cept that for a period of sixty days flaw.

waves, which led the investigators casting station, if you plenne!

"Banks and shore-lines of rivers this distortion depends greatly upon after Presidential approval no holder "This is the situation that will to conclude that these distortions of a lipuce issued by the Secretary exist under the Congressinasi con- were. traceable to an underground may be disconcerting to radio-waves. the wave-length.

For this reason, it is always ad- of Commerce shall be subject to the promise until one year after the enbla lino extending in, a south-Thus, if you are camping and fishing

To quote fur-with a radio receiving set and loop visable to detune or open circuit any prunities provided in the bill for hirst meeting of the Federal Radio easterly direction,

us a pick-up. system, the waves from antenna which are in the immedi [operating a station without licence.' | Comunicaion. After that all the ther:-

With a portable direction-finding your favourite broadcasting station ate neighbourhood of a direction- This sixty-day period will expire on peters and authority vested in the April 24.

commission under the new kiw, és natt, the représentatives of the may be slightly distorted, and your finding station.

acoil antenna, in effect, muy lose doubtful whether burying wires near **Presklent Coolidge will appoint jucjt as to revocation of licences, Bureau of Blandards invaded a Itadio Commission of five them will be vested in, the Secretary of valley, through which coursed a some of its otherwise, sharp direc. the receiving station is sufficient to

The tional properties. However, tests avoid all distortion. hers-one from each of the five zoner Cominerzo. But the commission brook, twenty-five feet wide.

" 'In general, the distortion do- into which the country is to be titer the lapse of a year is have direction-findler was carried from behind a twenty-foot bank afforded

power to act upon and determine paint to point along this brook, and proof of relatively little deviation of grenses to a nagligible amount at a ny and all matters Eught before saly in one instance did the invisible radio waves. Furthermore, we are distance away from the disturbing it on appeal from the decisions of wave swerve to any appreciable de informed that a wave speeding over object about equal to its largest

one-half mile of fresh water, ap dingusion." the Secretary of Comineren.'

divided.

"Not ingre than three members of the commission may be of the sarae politicni party and no member

gree.

-BRINGING UP FATHER.

The

source

It also

Acema

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