1934-07-24 — Page 10

10

SCIENCE OUTWITS THE

HOUSE BREAKER

Invisible. Rays Bar Cracksmen

But the moment it la off from the receiver, there is a change in the current of the photo-electric cell. A relay is released and an alarm sounds.

This would hap- pen, of course, if somebody step- ped between the emitter and re- ceiver. So that to checkmate any intruder, it is only necessary to arrange for the beam to travel in such a direction that anybody en-

When it comes down to brass tacks burglary as a liberal pro- fession is losing its attractions, Too much time and money must be spent on aequiring the indis- pensable technical training. In medicine, law. or engineering you pass your examinations, secure some kind of an appointment and leave your career to develop it- self merely taking care' to ac- quire all the practical experience tering the room must intercept it. you can as you go along.

As infra-red rays can be re- But burglary is different. How-flected, they may be made by the ever thorough your apprenticeship use of mirrors to pass to and fro may have been, you have to run an endless race against the pro- gress of science. You may start an adept at all. the best methods of work ingenuity has ever devised But you can never be sure that some meddlesome professor in horn-rimmed, spectacles has not Just invented some new dodge to cramp your style and omitted to publish an account. of the prin- ciple on which it work.

If you were to make a serious attempt to keep abreast of the march of technical development, "you would have little time left to remunerative business. attend to However careful you may be, you can hardly hope to detect every new trick. that comes along, so that

calamity.occurs much too

again and again as often as de- stred from one side of the room to the other on their way from emitter to receiver. For instance, they can be made to pass across a series of windows, in front of the doors of a strongroom, past

valuable stock in a warehouse: or even round and found a safe sev. eral times. Moreover, simply by the re-arranging the reflectors, path of the infra-red beam, on the way from emitter to receiver, may be varied daily or as often as desired, so that there is no possi- bility of anyone discovering be- forehand what parts of the room the beam touches.

A Safeguard

One might imagine that, if a often. So it is not to be wander- | burglar knew that a buliding were ed at if one of the oldest pro- fessions of all is threatened with extinétion....

Sporting Chance Things were not quite so bad as long as the obstacles put in one's way were of a material character: and might have been spotted if That one were observant enough gave you a sporting chance. But when infra-red rays--invisible to the human eye-were pressed inta the service, I was clear that bur- glary would lose all its thrill ence these safeguards came into universal use.

These new methods depend on the peculiar properties of what is about known as "visible light". which a good deal has been heard in the last year or two, on ac- count of the increasing number of

uses found for it in photograph. But a good deal less has been sald about the fact that invisible light has already been put to.

Very few words are needed to explain the principle on which the usefulness of "invisible light, do- pends.

יו

Now among the peculiar DIO- perties of these invisible infra-

safeguard by infra-red rays, and had discovered where the emitter and receiver were placed, he could render the whole equipment use less by bringing along his own Infra-red emitter, running it off a house plug.

and then carefully standing his emitter in front of the house holder, whereupon he could move about without 'crossing the beam, so that there would be nothing to give the alarm.

To prevent this happening, in-

have been genions precautions taken.

Inside the emitter is a rotating. screen, similar to that used on lighthouses, so that the beam sent nut is not continuous but comes off and on. fusted to this of course, is known only to the As infra-tec rays householder. are invisible, an intruder cannot find out the secret. If the burglar were to bring in an ordinary infra- red ray emitter. It would be use- less for silencing the alarm, be- cause it would not have the same "tune."

The receiver is a arrangement, which

When it comes to further sp- plications of this system of safe- guarding, all kinds of possibilities.

red rays is their effect on a photo-suggest themselves. For instance, electric cell. S

些

"Nitraphot Lamp. |

a current is passing. its strength will be affected. And this resulting change in strength can be made to operate relays, whereby current elsewhere can be switched on or off Es destrea. By án ingenious use of this attribute thoroughly effective precautions may be taken against theft.

OF each

HONG KUNG DAILY PRESS, TUESDAY, JULY 24, 1934.

LOCAL HOCKEY

Association Meeting On Tuesday

At the annual, general meeting of the Hong Kong Hockey Assó- elation which will be held at St. Andrew's Church Hall at 5.30 p.m. on Tuesday: 31st instant, business will betemi

To receive the first Annual Repors and Statement Accounts, ON

12.

108

of

2. To elect officers for the ensu-

ing year.

3. Any other business, Attention is drawn to Rule 21" which provides that any member desirous of moving a resolution at the Annual General Meeting shall give notice thereof in writing to Hon. Secretary at least one week

before such inleeting."

BLIND GIRL TYPIST

Does 200 Words A.

Minutes

A Blind shorthand-typist. Miss Mabel Green, will take a verbatim

note of the speech of the Prince of Wales to-morrow when he visits the headquarters of the National Institute for the Blind in Great Portland-street.

THE CYCLING CLUB Attempts At Road

Records

when

SOCCER COMMITTEES

ELECTED

Discussion On Asst. Hon. Secretary's Vacancy

U. S. BASEBALL

Babe Ruth Back For Home Run

تب

Cycling Club which was scheduled Sunday's run of the Hongkong to commence from the Vehicular Ferry, Kowloon at, 9.15 pm, was

The first monthly meeting of postponed until 1 pm. several of the hardened members

the Hong Kong Football Associa· tion Council for the 1934-35 season carried out a direct out and home trip to Castle Peak Mr H A. G. took place yesterday evening at Keates, who had arranged to lead the Sports Ghib when Major C. M. the run, disappoinungly failed to Manners OBE, Chairman of the put in an appearance and Mr. T. Association, presided and was sup- Wallis amictated in his absence. ported by Mr. G. T. May, retiring In spite of the delayed start, the Hon. Secretary, Mr. W. L. Alexan party soon found themselves soak der for the retiring auditors. ed to the skin, but this did not Messrs. Perty Smith, Seth and

Babe Ruth, New York Yankees deter them, and despite the minor Fleming. Mr. R. Hall, Vice-Pré-, !

the non-star batsman resumed play to- discomforts of imbising refresh-sident representing ments at the Cafeteria in their Chinese Civilians. Mr. F, H. Barnes day after his recent accident. He wet clothing. quite a jolly band (Club de Recreto), Captain E. set out on the retam trip at 4 Hague (Royal Artillery), Captain p. arriving in Kowloon arter a F. E. Williams (Lincolnshire Regt.. fast pace had been set at 5.10 pm. Lieut. Chapman (East Lancashire Next Sunday it is intended to Regt.). Mr. W." Pride" (HR. Foot- make the objective of the rub ball Club). Mr. Wong Ka Tsun Sheung Wo Hang and Sha Tau South China),, Mr. H. K. Lee Kok, in which area several paths,Chinese Athletic), Mr. R. Ging- etc., are to be explored.. Mr. L. A. | ham tét. Jóseph's F.C.), Mr. A, R., Anning will be in charge on this Hughes (R. Navy) and Comdr. occasion, and a fine time should Hussey.. be had under the old Flymouth" "After the June statement of ne- C.C. tider. For the benedt of counts" had been adopted. Major those interested cycllats who are Manners proposed that Messrs. not yet in possession of machines Percy Smith, Seth and Fleming.be their own, an arrangement has re-elected auditors for the ensuing year. Captain Willams seconded been made with Yuk Wah, 111 Hennessy Road, Wancha for cycles to be hired out to participmously carried.

the proposal which was unani ants in the above run, for 50 cents cho time Hit)

Definite intimation of attempts to establish road records in Hong received. Kong have now been

Major Manners then proposed that they ask Mr. G. T. May, the retiring Hon. Secretary to carry on as Hon. Secretary, and this was also carried after being seconded

Miss Green, who uses a. amali slerit machine made solely far blind stenographers, is able to take down 200 words a minutes...

Her machine is small and has Mr. J. Cole is to ride for the 5 and Mr. Pryde, Pa

Read. will attempt the 25 miles. 10 miles records, whilst Mr. C.

settled down to strict training, and a trial is to be made during this week on the Peninsula..

only seven keys, one long cue which perforing ‘a similar function. to the space-bar on a typewriter and six small ones. These repre- sent the seven dots in the Braille

As the Keys alphabet.

are

operated embossed signs appear on a paper ribon, from which the re- port la afterwards typed on an or- dinary typewriter.

Miss Green who has been blind, from birth. was employed as a shorthand-typist at the Ministry of Health for 18 months, and gave up her post to another blind girl. She is a gold medallist for Braille reading and is widely read and cultured. She is also a practised telephonist

VIOLATING SANCTITY OF

JEWISH CEMETERY »

Special to the Hong Kong Dalis

Copyright.)) Press

Padenborn, July 23. For violating the sanctity of the Jewish cemetery on June 28 in Fa-

to protect valuable all paint'ass. | denborn, Johann Schmidt, Franz some museums have had small Rebermann and Herman Wellner mirror-reflectors fixed

were sentenced to terms of myri- picture in such a way that visitors sonment of one year, four months

and six months respectively.

cannot notice them. An Intra- red beam is made to pass to and

from from picture to picture. The leastmovement of any one of the plctures would at once set of the kind are just as effective and just alarm. Optical safeguards of this

The accused admitted the charges but stated in defence that they were drunk at the time. When

an inebriated condition the first the roof of the synagogue at the act was to get a ladder to mount

as invisible by night as by day, cemetery" and :

To apply this principle in prac tice, it is necessary to have (1) Bome Convenient means for gen- erating infra-red TOYS,(2) A suitable contrivance for collecting them again just as in "radio-

transmitter and a receiver. This

soner:*:

kept a lackout.

throw down the

Both have now

DAVIS CUP TENNIS

Rain Interferes At Warsaw

Warsaw, July 22

In the Davis Cup tennis match. Tloczynski (Poland) failed to reach a decision with his Belgian op- ponent Nayert sowing to rain in- terfering before the third set was Anished. The Polish:-player was leading 6-4, 10-8,-7-8. The game will be continued" from this stage. So far Poland. is leading Bel- glum by

matches to are, two Reuter.

FLOOD TAKES IT TOLL

Railway Tracks Washed Away

Peiping July 16.

The flood along the Peiping-Sul- yuan Railway is assuming grave proportions as a result of the heavy ranifall Through traffic on the line has been suspended for several days! Attempts made to repair the tracks washed away by the swift

presents no technical dimeulty.ion of this principle, burglars by Adolf Hitler.-Transocean current have been 'useless owing to

Any powerful source of electric

A

Min

- NEW “LOCARNO" NOTE'

(Special to the * Hong Kong Dafh Fress" (Copyright.)1

London, July 22.

the depth of the water!

|

Much discussion arose as to the

proved his fitness by hitting a home run against Chicago White Sox, enabling the Yankees to win by 8 to 2

St. Louis Cardinals won both games in their double-leader pro- gramme against Boston Braves.

The folowing were the results:--

National League

Cincinnati New York

R. H. E

The Breatheable

PEPS

Banish CHILLS INFLUENZA

1 10

1

THE

2 7 3

There were 11 innings.

Chicago

... 5 14

Q Philadelphia 6 14 2 Chuck Hartnett homered for Chicago and J. Moore for winners in 12 inning game.

Pittsburgh

2 8 2 1 Brooklyn..... 3. 4 Lindstrom.homered for Pitts-

:burgh.

."

Pittsburgh Brooklyn

10 15 3 3 19 1. Vaughan, homered for Pitts-

possible selection of an Assistant Hon. Secretary and Major Mannersburgh said that after much consideration he thought it would be: an ex- cellent thing if they asked Mr. Alves, the Secretary of the Sports Club, to All the position as he would be right on the spot 'in case any information was immediately wanted.

Mr. Pryde stressed the necessity

St. Louis Boston Wally Boston:

St. Louis

Boston

Berger

Wally Berger

for: St. Louis, !?.?

5 10 1 4 4 B homered for

4

7 0

2 7 3 "and" Whitney

American League

New York ... 8 13

Chicago

..... 2. 7. 0 homered for New

of having an Asst. Hon. Secretary | homered for Boston and Rothrock 'who could find time to attend the large football games which had any special interest to the Associa tion, and he understood that Mr. Alves would not be at the disposal of the Association on racę days.

"Major Manners said he thought that they really wanted someone who could attend to the Associa tion's records and not so much as

attend football games to

and

check the gate money.

It was further stressed by Mr. Fryde that it would be better "if

the "Association showed a decent- balance rather than a good set of records and intimated that it was most desirable that the Asst. Hon. Secretary should see his way to being present at large soccer games.

After further discussion It was agreed that Mr." Alves be asked to mil the vacancy as Asst. Hon. Secretary subject to the election of"a" Committee for the control of grounds (gate' money).

Mr. Pryde' asked that the Hon. Secretary note' down that the sub- jector for election of a Grounds Committee be appended to the next meeting's agenda. This was accordingly passed, and

The following Committees were elected for the year 1934-35:-

Appeals Board: Sir Thomas Southern, Mr. R. Hall, Mr. M. K Lo and Capt. E. Elliot Heywood.

Emergency Committee: Mr. Wong, Ka Tsun, Capt. F. R. Willams and Mr. R. Hall:

ped with such an arrangement, it knocked over 54 gravestones in so that, once à collection is equipatar of David. Afterwards Schmidt

is permanently under supervision. twenty minutes while Wüellner

Besides setting off an alarm, a shutters to drop, thus closing every relay could be made to cause con

The publle prosecutor said that drunkenness was no excuse and broadcasting there must be a exit and making the thief a pri- that in fixing the punishment the accused would be guided by By one very ingenious applica- the principles recently laid down

themselves actually provide in.; Light say a Nitraphot lamp-will contestable proof of their identity

The centre of the food area is emit infra-red rays. All that is

at Pingtichari, eastern. Bulyuan.

League' Management Committee necessary is to enclose the lamp and guilt by releasing mechanism

where the wizer has reached a Mr. H K. Lee, Mr. A. R. Hughes, In a container made of a special that photographs them at work" kind of glass that allows only breaking into a Jeweller's shop- Imagine, for instance, a man

height of over 6 teel Torrents of Mr. A Goldenberg; Capt. 2. Hague infra-red rays to pass, but window or forcing a safe,

water pouring down from the and Mr. R. Gingham. slopes of Chotau Shaa" (mountain)

ounty Referees Committee: Capt. E.. others. Bimilarly, the photo-

yesterday destroyed a number of Hague, Commander Hussey, R.N.. camera, charged with & photo- electric cell of the receiver must graphic plate, sensitive to mira-

mudhuts at Piketst station Mr. and Mr. F. E. Barnes and be enclosed in a receptacle made red rays, is trained on the spot the

shen Chang, Managing-Director of

The Chairman salt it was the or the edme kind of glass, so that

burglar will occupy. As soon as the only Infra-red rays can reach the intruder enters and interrupts an

An interesting article on the the Peiping-Sulyuan Line, visited practice to vote an honorarium of cell

continuation of the discussion of the scene yesterday to make a $250 for the year to the Assistant invisible beam, a flashlight, con- Eastern Europe appeared in the personal inspection of the actual Ton. Becretary, and although this Filter-glass of this kind is al-

tained in

a receptable made of well known

matter should have been dealt with most jet black in appearance. alter-glass, goes off the camera 16 Economist" regarding an article

British"

weekly situation.

According to railway circles the at the annual general meeting, it Both emitter and receiver can be released and a photograph is in the new "Locarno, Note" which Feiping-Sutyuan Lipe was arst was overlooked and he asked that built into the wall, and if this taken. Af the

alter only allows stressed that Britain's policy from seriously flooded in 1929, when view of Mr. A. Goldenberg's too is painted a dark colour, invisible light to escape, the bur- the very beginning had associated trame had to be suspended for 34 valuable assistance to the Associa neither will be noticeable.

Intra-red rays are reflected by

the idea of an Eastern pact with days: The aresent flood situation flow from the time he took over" mors exactly-like visible. light.

being worse than that of 1929, great from Mr. Logan that an So that by putting concave

was the "world will remember that railway from the time he served until the One of the more urgent passages.concern is felt for the safety of the honorium of $250 per year pro rata mirror behind the lamp in the elter the beam leaving the

the original Locamo treaty con- Both the Luan Eo and Yungting emitter consists of parallel rays,

tained a clause imposing obligation Ho are continuing to rise, it is re- hence all the light, will find its

to disarmament. The treaty was ported The Velping Liaoming Rail duly signed but disarmament was way has despatched a car with way to the receiver. And if a sallar mirror is installed inside

never put into effect. Sir John staff or engineers to the vicinity the beam will be

Simon alearly recognised this when of the Luan Ho bridge to prepare thitect ver

H he certified in his recent speech for an emergency Trains crossing brought to a focus on the photo electric cell.

that the opportunity must be the bridge have been warned to Electrically, emitter and sender

utilised not only for providing proceed at a slow pace. are so "attuned" to each other,

security but also for discussing Tangling Ho, the wo equality or rights-Transocean on a level with its ba that nothing happens if the beam 15 andutürbed!

Kuo Min.

Min 49

lar sees nothing, hence has no dea that anything has happed. number of convictions have al ready followed from the evidence obtained in this way.

Safe Enough · A man entered a crowded rall way carriage and placed a heavy box on the rack,

A nervous passenger eyed the precariously balanced package and then ventured: " say, do you think that's safe?”:{

**Oh, yes,” said the man, cheer

disarmament,

હર હર

end of the current year be voted. This was unanimously carried and the meeting then adjourned

Quite!

"There is nothing that causes the much misery as the section, and losing of money

Kuo states a

agree as

Babe Ruth

York.

New York Chicago

5 2

.15 19 1

2 Byrd "homered for Chicago.

Boston

Cleveland"

Boston

etc.

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* TIMES

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10 1

Cleveland

10

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What do

0

4:10

1.

Washington

St. Louis

Philadelphia Detroit Dietrich pitched.

4

Philadelphia... 8 13 Detroit

1 ..17 14 Greenberg and Foxx homered for Detroit Reuter,

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