1924-02-16 — Page 13

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SELECTED HUMOUR. me, sir, that you are not far re-

A Killing Retort. She-I heard you singing in your room this morning.

He-Ob, I sing a little to kill time.

She-You certainly have a good weapon.

OH, PARDON US! "Terribly rough, isn't it?" she observed, as the roadster jolted over the road.

"Put I just shaved this even. ng, dear," he replied.

PRETTY CLOSE. Irate Individual-It seems to

moved from an idiot.

The Other--Only about a yard

VERY ANNOYING. Muriel-I think shopping is such a worry Don't you, dear?

Phoebe Rather. I never can for the life of me remember which shop I owe monay to.

CAN'T ALL BE GUILTY.

A man who broke into a house recently took nothing but graphophone. All the neighbors now are under suspicion..

SHOULD HAVE KNOWN BETTER. "Hello, Jones, what's up?" **Gunshot wound, old man,”

'Phone 1030.

the cornet."

NO CAUSE FOR ALARM.

RADIO NOTES AND NEWS.

The Great Possibilities of Wireless«.

In the course of an article in, would be so numerous that no the Observer Sir Oliver Lodge trace could be detected, unless writes ~~

the opacity were insignificant. Hence it appeared that long waves had the advantage..

The discovery of electric waves was made in the latter think of the last century by that tremen- But to the physicist it always dous mathematical genius. Clerk seemed that short waves ought tố| Maxwell, on the purely theoretic do better, if apàco were as reason al side. After twenty years, ably transparent as one might Hertz showed how to produce arpect it to be; that is, when the. them practically; and, what was air is hardly ionised at all, a con- more, how to detect them at adition to be expected in the distance, in an elementary and absence of light. And now it is purely laboratory fashion. Fur- found that, at any rate durins ther improvements in detect the night, short waves are quit

appliances ing

soon efficient And the great size of

were

derised by : many people sending and receiving station- and in due time they were made will probably in dus time be found | amonable to practical and com-unnecessary. A short-wave or mercial uses by the energy and small station is just as energetic enterprise of Senatore Marconi as a big one, within limits Fo

the true wave starts, not at the and his co-workers.

was

To a public ignorant of the actual radiator, but at about a work of Clerk Marwell and quarter-wave length distant from Hertz, this application came as it Hence the shorter the ware a great -surprise, and seemed the nearer, and therefore the verg, novel and mysterious. To more energetic, is the place from physicists it did not seem sozit which it starts. A radiator no dumb-bell can a natural application of bigger than a

horse- what was known. But when, lemit

of 100 waves

This later, Mr. Marconi found ex-power.

WES known perimentally that the waves long ago, in 1890. A great big would actually eurve round the radiator under the sine con- intense earth and reach the American dititions is no niore Continent, physicists were sur-though it is true the emission prised. It was an important dis-would last longer: that would covery and the mathematician depend on its capacity. And what Mr. Oliver Heaviside showed how is true of the emitter is also true) an ionised layer of air in the of the receiver. Henco recent ex- upper regions must be operative,periments have re-directed atten- and could explain it.

tion to the advantages of short-

CONTROL OF FLOATING BODIES.

Then came a method of detec-wave transmission: and short tion far superior to any that had waxes are much more amenable previously been used. namely, to discipline. They can be pro- the vaccum valves of Professor tected by parabolic mirrars of Fleming, improved, as they soon reasonable size; that is, they can were, into their present form by be directed, as light waves are Dr. Lan de Forest of America. directed from a light-house, so as In these valves the actual electo economise them and concent- trical particles, the electrons,rate them on any required direc- were employed as the detecting tion. There can be little doubt agency, and proved themselves that this power of focussing and far more perfect than any materi-directing waves will be applied al mechanism could be. They more and more: so that, except responded instantaneously to for broadcasting purposes, it will every Bactuation: so that it be- not be necessary to send out came possible to transmit, notwaves in every direction at Morse signals öaly, bat microp-random. honic or telephonic speech.

For some time it seemed as if Another improvement which is speech could only be transmitted to be expected is the attainment of lover moderate distances. But greater power of control over dis- now, through the energy and en- tant things like aeroplanes and thusiasm and inventive genius of steamers, or other self-propelled a great number of workers in all floating bodies. The rudders of parts of the world, but especially such machines can be actuated in England and America, it has by people on the spot, but they been found possible to hear the may also be actuated wirelessly human voice across the Atlantic. by people at a distance: So that) Not that the voice travels any an operator at a sending station, further than it did before, any manipulating bis keys, may more than it travels along a tele-guide a distant floating body to phone wire: the voice generates any desired destination, so long as electric waves, with all its pecu- he can see what it is doing, and liarities accurately represented in adapt his control accordingly. aeroplane is not 50 those waves; and when those An

£ floating waves are collected by a distant easy to control as

another Laerial, the electrons in the re- body, because it has

ceiving valve respond with degree of freedom. It can more! precision to all the fluctuations, up sad down, as well as right and enable a telephone to repro-and left. To control it perfectly But duce the speech and the tones of is therefore not so easy. voice of the distant speaker. The none of these things is easy. achievement of speech across Difficulties are things to over- the Atlantic in this indirect way come: and the ingenuity of those is certainly a marvellous achieve who are working at the subject ment, one that excites the is more than competent to deal admiration, and to some extent with a difficulty such as this. It' the astonshment, even ofis interesting to find, moreover, old-fashioned coherer, physicists. Nor is this likely to that

be the limit. The waves that employed as e detecter, Beems have begun to curl round thespecially useful in these distant- 19 de- earth can go on. even to the control experiments, Antipodes; and in a short time it monstrated recently by Major is likely that the human voice in Phillips. this way can reach Australia and New Zealand.

surprising.

LONG VERSES SHORT WAVES.

SYNCHRONOME

ELECTRIC. CLOCIT

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"SEEING" BY WIRELESS.

What other developments are to be expected? Unfortunately Thus humanity will be welded a certain amount of energy in together in a manner more the present state of civilisation intimate than ever before; and is directed to the opportunities it is bateful to dwell upon them, however, is not everything. And the beauty and the simplicity of for doing damage: that is, direct-and it is not a subject on which if there were any signs of out

i am any authority.

getting to the end of our tether the arrangements, and the coming things for deleterious purpo-

which there are not of present parative ease with which the ses. And if people wish to du

there would be nothing to lament is result effected. are very those things, no doubt they will Attempts have been me e re.

Locomotion is a purely phy be able. It has been surmised cently, and are still being made, sical thing; but communication that aeroplanes can be stopped at what is called "television,"

whether by speech, writing, or It used to be thought by the in mid-air. Well, as Hertz found that is to say, seeing at a dis telegraphy, is not solely a physi early experimenters that to get long ago,

are ance, either by wireless or by cal thing. It is a psychical thing waves to travel effectively over powerful enough to generate little wired means. If one is done, too. There were those in the 60% enormous distances, the apparatus sparks in metal conductors; and doubtless the other will follow and 70's of last century who used must be large and powerful as the explosions of oil vapour But at present neither can really lamented that many of the mez and the waves very long. Long in a motor are regulated by little be done. Pictures can be trans-sages sent through the re waves can certainly get through sparks, it soons quite likely that mitted after a fashion, by a code, cently achieved Atlantic cable obstacles which would stop short such sparks can be generated at signalling the position of dots in

were either deleterious ones. Why? Because in going wrong times by the

a process block, or something of rubbishy. It is no use enlarging througha slightly opaque medium, of waves generated at dist that kind. Or they may actually our power of communication a certain percentage of energy ance; and, if so, the engine produce a picture, as a sort of we have nothing worthwhile to

ether Waves

action

is wiped out at every swing may be brought to a standstill by mosaic of such dots. But this is say. The moral and spiritus. Great Scott! How did it The crest of each wave will be the generation of unexplainable not really vision at a distacce. It development of mankind ought happen? Out hunting?"

slightly weaker than its pre-engine trouble.

Such disturb is only a modified form of print keep pace with its materiai "No, I was boine-leaning decessor. So if in a given disances can be guarded against,ing-telegraph. For myself I am achievements. And if they do not

tance, say 100 miles, there were when foreseen, by the proper use not sanguine of seeing anything it is possible to regard even tho

would of metallic acreens, because that can be properly called tele-achievements with gloom and twenty crests-which

That, howeve "You look like a good risk, mean that the waves were five metals are opaque to the waves, vision for a good many years yet apprehension.

miles long-there would be a and will ward off or reflect them perhaps not for a century: though would show. a lack of faith. Th Mre Malone. but will you

any invention which humanity real progress of humanity ve kindly tell

me what your chance of a sufficient portion harmlessly.

Contrivances for doing damage really wants to devise will prob- necessarily slow, while materi getting through, even though father died of?"

are dangerous until the antidote ably sooner or later be accom-achievements may be rapid. "Di can't rightly rimimber as each wave was 1 per cent. weaker

But if is found. There always is an plished, by means perhaps at rests with ourselves, howert to thaot, sur, but sure it was than the one before it.

the waves were only a quarter antidote; but meanwhile much present unknown and unsur whether or not one can keep nothing serious.“

mile long, there would be four damage may be done: and it is pected.

with the other. There shoulde hundred such crests in the 100-1 Iamentable that the ingenuity of However great have been cur no feeling of supine zelf satisfa "My dentist was a fine fellow, mile distance, and the proportion man is thus capable of being improvements in locomotion and tion in what has been done, bu Each time be extracted a tooth of energy which got through misdirected for what are sup communication during the past girding up of our energies to bé gave me a glass of whisky would be very slight. While if posed to be patriotic and justifi- hundred years that is but a small that the progress is not too i

"Don't you go, to him try the waves were each only a able reasons.

period. And who can say what sided and unbalanced; and to Other things can be suggested will be accomplished in the hun-į trive that the reign of goo hundred yards long the oscil- Istions in the given distance of a damaging character; though dred years? Material progress, keep pace with the reign t

FALSE ONES DON'T COUNT.

more ?""

"I haven't any more teeth,"

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