1924-07-19 — Page 13

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HONGKONG TELEGRAPH. SATURDAY, JULY 19, 1924. ŒFEATURE SECTION).

When we have produced an antiseptic which can be taken internally without risk #injury to cell-tique, we shall have conquered infectious disease."-LOAD LISTER

MALARIA

and

'Yadil' Antiseptic

THE reports received from various parts of the Empire as to the results obtained in malaria with Yadil Antiseptic deserve

that disease If. further experience should support these reports, it means that malaria has At That been conquered. It appears that one or two doses are generally sufficient to check an attack at the onset, and prevent its developing. Sufferers who have been in the habit of going to bed for a week or more during an attack arc able -to continue their daily work, when they take a Joke or two of Yadil at the first warning of at return of the disease. All reports but one are based on the use of liquid Yadil'; in that one case, the Phils have proved equally effective.

T

HE true value of Yadil' in the treatment of malaria can only be definitely established "by the sufferers themselves, and not by laboratory experiments, sincerely trust that all thone who use Yadil" for this discase will kindly report their experience to me, or to the news papere. If it should turn out that Yal is suc.. cessful only in a small proportion of cases, I should not hesitate to make the fact_known mys f. But if the experience of thousands of aufturers proved definitely that Yadil' checka malaria and eventually drives it out of the system, what a glorious day it would be for all the races who live in nularial countries!

W

ZITH 'Yadil' there is not the slightest

risk of any bad after-effects. It is abso lutely safe. It is entirely of harmless vegetable origin. les active principle is natural essential oil of garlic, but it never taints the breath or body. Ir has been used by thousands of medical men throughout the Empire during the last seven years, in malaria, pneumonia, scarlet fever, influenza, cholera, dengue and blackwater fevers, typhus, diarrhea, dysentery, psilosis or spruv, gangrene, infective wounds, sores, for scalds and Burns, bronchitis, coughs, colds, dyspepsia, etc. Yadil-destroys within the system all bacterial infection. Once the cause of disease is removed normal health is promptly restored. It is very simple.

T

THE YADIL BOOK, 288 pages, cloth bound, gives correct treatments, all based on doctors reports, for some 200 disorders. Invaluable to keep at hand for ready reference in all cinergencies. Sent to any address on receipt of 2/6, or may be ordered through your chemist.

A

Buyers

SK your chemist for a-supply of Yadit and a copy of the book. I out of stock he can order some through his London

Alex Cli

"Yadi Anterpie jrpated exchovely by Clement & Johnson Limited 19 Sicilian Avenue London, England, and is supplied to Chemists in the Ear East through London Buyers only. The following are approximate prices:

Arquis

$

10% 90 1.2

Catment.

fabant for the Skin

2.m

1'int

150 2200

2.25

2 Di

1.00

.Sc. Quart-19.00 5.50 SOU 3.50

10 (X) 100%

.30 Pastilles (for the Voice) per tin Powder (for the Toriel) per t

1.00

Pronounce it YAH-D1

The word · YAÐIL

is registered

Chesterfields are always fresh. Each package is en closed in a moisture-proof glassine wrapper.

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W .A.

́RADIO NOTES AND NEWS.

Wave Trap Reduces Interference.

While DX To the rage, the wayo dicata that we are on the ̈ ovo of trap ought to her handy for fana a remarkablo dovolopment in troubled with local interforence, commercial wirologs high-speed | Baye a writer of American radio, tolography and telephony to all notes.

parts of the world.

Especially in this simple con "On Sunday-wo carried--out trivance helpful in olimination of some tests from Poldhu," Bald nearby broadcastors and in reduc-Sonatoro Marconi, "without util- ling to a tuinimum roradiationing what is called the 'Beam. from an oscillating receiving sot. system, but ucilising many Anyone with the least mechan- features of that ayetom, so that the electrical waves wore not ical ingonuity and at little ox-directed to any particular part of penso can build this wave trap the globe. It consists of the following parts: A 3-Inob, this oylindrlos! form, inches long, and composed of a good non-conducting material. A fow foot of No, 22 or 20 DCC wire.

A good 23-plato' variable con- donser, not vernier.

A. switch and five switch points...

transmitted was clearly heard by "During the tests the apocol Mr. E. T. Fisk, managing direc tor of the Amalgamated WireTM loss of Australasia, on an or- dinary home valve 10colving ap paratus, near Sydney.

Just unpacked

a consignment of the latest

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at moderate prices Inspection cordially invited.

We are also informed that Les Elegances de

Mr. J. H. Thompson, of the Canadian Marconi company, heard his speech in Montreal.

Whoro great difficulty, is on- countored in tuning out a local telephony has ever been carried "This is the first time such station, because of broadnoss in transmission, and its extreme on betwaan England and Aust- proximity, and where there are Įralia by this particular method. more noarby broadcastore trying to force their programmes into your receiving set, the trap shown in diagram at right should be used. But in case of only a single violator in your district tho simpler hookup will do. This is

constructed as follows:

Wind tho 22

DCC wire around the tubing for about 35 turns and hook one and to the aorial lead-in and the other direct to the aerial binding post of the receiver. Shunt the condenser Jacross the two terminals of the

coil,

"I have no doubt that when the beam systom is utilised with the same waves that we bave been using for this non-diroc- |tional system, the results will bo in overy way satisfactory, and that it will be available for high spood telography and telephony hotween England and Australia, and other parts of the world."

Senatore Marconi stated that power upon which exporimental messages were transmitted was onlp 20 kilowatt (between 20 and 125 horsepower),

"But although wo shall cer-1 tainly follow this up, my expecta-

to operate this trap, not the tions are largely based upon the ¡ dish of the tuner in your e caiver [boim system," said the inventor. a little off from the local station (I believe that with a highly that you want eliminated and ud. [directings) (boam) system, Whare just the trap variable condenser the wireless energy is not spread until the local station's signal is all over the earth, but is concent fas faint as you can pinssibly got rated along one path, wo shall

it. Then tune in the distant accomplish the same results with. Estation and again adjust the trap about one-tenth of a kilowatt of, Jcircuit,

powar.'

1 careful adjustment should Mr. Godfrey Isaac), of the be rondo without vernier attach- | Murcoal Company, intimated that ment on the wave-trap condenser they were prepared to erect'stat- so that you may know at exactly jans in Britain for the new what paint to not the condenser system of transmission the mo- whenever you want to tune out (nient they obtained the facility for the local station.

so doing and they were also In case of more trouble than | quite ready to do so in other from just one local station, the countries,

mora complicated wave trap

would be usert."

TURKS

0005 mil

TO ANTENNA POST

RECEIVING SET

By the beam system to which' Sonatoru Marconi referred it

10 TURNS

.0005 HEX.

"TOʻANTENNA POST" OF RECEIVING SET

TWO FORMS OF WAVE TRAP, SHOWING CONNECPIOS OF PARTS.

On top of the 35 turns of wire, would bo possiblo to RAVO and in the same direction, wind about 90 per cent.

con-

10 turns of the same wire, mid- structional costs and to talk way hetwoon the terminals. This to Australia using about

is the primary sad the larger coil one tenth of a kilowatt power.

the secondary of a separate in- ductanco

The primary of ten turas should

bo tapped overy second turn, so that any station desired may bo

eliminated by variance not only

of the condensor, but of the primary inductance.

denser' is' 'shunted across the

•

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In this case, the variable conolovtrical disturbances lasting states that he has nover yet and continuity of service on ox- The remarkable discovory that minute space of time. Mr. Potors fassion to increase the reliability accondary, but the aerial lead-in twenty billionths of a second can detected visible light in tho isting power lines. The device is brought direct to the primary he made to record themselves on camera while photographing a is applicable to transmission linos coil of the wave trap and the photographic plato, without surge and that therefore the im- of all kinds and is connected to switch connected to the serial light, has been made by Mr. J. F. pulses must contain some property them by moans of an electro- binding post of the receiver,

Peters, electrical anginoor, West-in themselves that affects: the static potentiometer.

range in wave length from 100 to material.

must

bo

If the materials used. in thisinghouse Electric and Manufac-plate. Tho prints obtained from In early tests Mr. Petors used device are efficient, the receiver turing Company.

Buch plate exposuree show manga condenser discharge to simulato Photographs made in such an geometrical figures of beautiful the condition that occurs during should he very solectivo. Doubla silk or cotton-covered wire should infinitesimsi timu aro most ro-shape and also tako on certain the poriod of a surge. From be used, but never daamolled or markable. To gain an idea of definito forms according to the these discharges were obtained any other form of wire. The this almost unbelievable speed it character of the voltage at the his first photographs of electrical tubing must be thin and of hard is only necessary to point out time the surgo or impulso occur impulses. Later, lesis were mado

that light could travel around rod. THE "ECOD'S" WIRELESS munication systom to the various teen receiving sets aboard rubber or other good dielectric the earth seven times in one from the dovalopod plate whether ed directly in transmission It is possible to ohsarvo with the Klydonograph connect. parts of the ship.

25,000 metros, and the Hood can Of all parts, the condenser must second and in twenty billionths the voltage at the time of the line Altogether, there aro nine thus tune in on signals from any ho host. It must have extremely of a second it can travel only surge was positive or nogative, The exporimontor is a native aeriais on the Hood. The main wireless station in the world. All low loss, designatee so by the twenty feat. The projectile of whether it was alternating or of Franklin County, Ponnay- the monster cannon used by the undirectional and the direction Ivania, and joined the Westing- and: miles receivers, thought there are only manufacturer.

Germans to bonbard Paris would the surge was travelling, and its house Company in 1985, working of wiro. In additional to nine acrisis, can be used simul.officiently built. various special Bactions of taneously. By connecting two *Be careful to keep this device have gone in this length of time intensity.

first in the shop, but soon being Mr. Poters states that the photo transferred to Engineering Depart- As would be expected, the wireless equipment, including receivers to one aerial it is possi- about a foot away from the reapproximately five thousandtha largest battleship in the world. direction Endors, the giant of the ble to use all thirteen of them at ceiver, so as not to couple it too of an inch-nat enough move-graphs obtained by the Klydogo ment. His Brst

enginooring... iment to bo visible.

graph are of immense impor-work was in the Transformor H. M. S. Hood, flagship of the transmitting sots and thirtoon Service Squadron has ragener.rather than holp it.

affect receptiou onco. No vossel in the Spacial closely and

The instrument used by Mr. tance to transmission engineers. Engineering Department and ho Special Service Squadron, carrios;

Patora to pitain his photographe The instrument for taking the has remained in that dopartingat porhaps the largest and most resiving sots, The eight trans-ative receivers which cause the

is. tormed a Klydonograph. It photographs is the only practical since. In the last few yours, Mr. powerful wireless equipment of itters includo a 25 k. w. Pol-aorials to oscillate. The receptive ENGLAND TO AUSTRALIA.

conulats of A 'suitablo Any vysnel aftout. Thoro

plato device yet invented and mado Potors has interested himself sen Arc sot and a 25 k. w. Spark range of the Hcod, and of mast

holder for receiving ordinary for. obtaining data in regard to greatly in high voltage phono- eight wireless rooms on the big st. From thons the instrumente of the other ships, for that mat Success With New Short-wave photographio platos and is that type of lino disturbancos, mona and did a great deal of battleship. Ono of them, situated range down to a 100-watt valvo tor, is world wide.

provided with suitablo electrical known as surges. System. transmittor. The transmitting)

Horetofore, work in connection with the brideo of the vessal.

connections so that electrical dis- engineore have only known that 1,000,000 volt trasformer at tho controly, through the operation of equipment Includas a special

Wireless lolophony between Fturbances may be brought into surges occur but whare thoy Westinghouse High Voltage enormous koya and switching telephony sol.

wirolus staff numbers forty- Cruat Britain and Australia by contact with the sensitized side occur and their naturo has been Laboratory that has created a arrangements, both the receiving When at on the great capital'nino. It comprisos Д floot means of a new non-directional of the plate.

largely guesswork. The photo sensation in the enginearing and the transmittine oporations ship never loses touch with shoro Wire-less ofleor, Q warrant short-wave system in an acco}}- When surget occur in the trase igraphic plato now gives the world. While on this work, ho in any one of the oven other stations. The high power trans-telegraphist, four potty officer plished fact.

mission line they photograph charactorioristics of surges, thus was directed to develop some wirnless rooms scattered over the miting installation has main tolographists, twelve loading tolo-the results of bis experimits to two-billionths of a second, or which to doviso lino protection.

Senatore Marconi explained themselves. The surges may last giving the engineers data with dovica for recording surges that. ball.. Eack wireless room is talond communication with

occur on transmission lines. Tho ombraend in network of buzzers constal. wireleva stations over a graphista, twenty talograhists, a Pross, representative rucantly longer, so that the photographic The Instrument will do much Klydohograph is the result of

olunan internal com-distance of 6,000 miles. Thal and ton boy tolographists. at Marconi House, and they in plate must rogistor them in that to onable the engineering pro- le investigation.

On the

Bro

British navy passOF SUR vight

The personnel of the Head's