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Lethbridge Herald Newspaper Archives

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Lethbridge Herald, The (Newspaper) - September 7, 1974, Lethbridge, Alberta 26 THE LBTHS.-.i'GH y, Sfjtemoer OCEANS Andy sends a complete 20- volume set of the Merit Students Encyclopedia to Roderick MacBain, age 10, of Fredericton, New Brunswick, Canada, for his question: How do they measure the ocean depths? They use a clever system called sonar, which is related to radar Both sonar and radar depend on echos that bounce back from there to here. This seems like a complicated wa> to measure the depth of the ocean. But actually the idea is very ancient, at least in the animal world. Scientists suspect that dolphins use a sort of sonar system to detect solid objects in the water Electric eels use a similar idea. In olden days, many a ship was wrecked on a reef and many a river boat ran aground on a sandbar. Atter all. when you are on top of the water, it's hard to see way down to the bottom Chahces are, you can see only a few feet below the surface. This is where rocks and reefs lurk, waiting to wreck a passing ship Until modern times, many ships carried a heavy weight on a long-long line. When a pilot suspected submerged rocks or sandbars, the weight was dropped overboard and the length of the line told how far it was to the bottom. This system sometimes saved a ship, but it was clumsy. Then a system called ''Sound Navigation And Ranging" was invented. The only clumsy thing about it is its name, but this has been shortened to SONAR. There are several sonar systems designed for different underwater jobs. But all of them work on the same basic idea An energy source is used to send sound waves through the water. They travel on and on at an average speed of feet per second until they bump into something solid. then they bounce off and echo back the way they came. The echoing sound waves travel back at the same speed and the sonar system on the ship has a receiving set to catch them the moment they return It also has a clever timer that measures exactly how long it took them to make the trip there and back With this information, a computer can figure out just how far the returning echos have traveled Suppose the departing sound waves return- ed after two seconds. Obvious- ly they spent the first second on the way there and the se- cond second on the way back The solm underwater object must be feet from the ship, because this is how far the sound waves travel in one second. When a sonar system is set up to measure the ocean depths, its sound waves are directed straight down to the solid sea bed. If the trip there and back takes six seconds, the sound waves and their echos, travel a total distance of 28.200 feet. The solid sea bed is half this distance, or teet, below This is over three miles and we must have been measuring a very deep part of the ocean. Some sonar systems are set up to detect solid submarines, prowling below the surface of the sea. Some are set up to detect and trace other ships sailing far and near. These systems also detect deadly icebergs, long before they have a chance to strike a ship. Questions asked by chil- dren of Herald readers should be mailed to Ask Andy, P.O. Box. 765, Huntington Beach, California 92648. (Copyright Chronicle Publishing Co. 1973) Flashback By THE CANADIAN PRESS Sept. 7, 1974 London endured its first night of the Blitz 34 years ago tonight in 1940 as German bombers made their first concentrated attack of the Second World War. In the first three nights were killed, seriously injured and thousands of acres of docks and warehouses in the city's east end were destroyed. 1816 The Frontenac, first Canadian steamship on the Great Lakes, was launched. 1870 The British warship Captain foundered off Spain, drowning 472 aboard 1914 German Cameroons was invaded by British troops from Nigeria. 1952 Gen. Mohammed Naguib seized power in Egypt 1959 Premier Maurice Duplessis of Quebec died CHANGES WARDROBE The hard shell of a lobster. which will not change in size, must be cast off and a new one acquired periodically as the animal grows Goran on Bridge BY CHARLES H. GOREN 9 TIM TrikMC vulnerable, as South you hold: VKQJ63 The bidding has proceeded: South West North East IV 2 NT Pass 7 What do you bid now? vulnerable, as South you hold: VK10974 The bidding has proceeded: East South West North Pass Pass Pass Pass IV Pass 2V Pass What do you bid now? vulnerable, as South you hold: V107 KQ10943 Tlie bidding has proceeded: North East South West Pass INT Pass Pass What do you bid now? South, vulnerable. you hold: 4Q954 VK108 The bidding has proceeded: South West North East Pass Pass Pass 4V Pass 7 What do you bid now? vulnerable, as South you hold: 4K952 VQJIQ96 The bidding has proceeded: West North South Pass Pass Dole. Pass What action do vou vulnerable, as South vou hold: VAK953 The bidding has proceeded: South West North East 1V Pass 1 NT 9 What do bid now? SouUi, vulnerable, tiold: VAHJ76 A97 Tht bidding ha? proceeded: East South West North Pass IV Pass Pass Dble. 3V Pasv What do vou bid now? Your horoscope By Jeane Dixon Q.S Neither vulnerable, as South you hold A 7 VQ3 KQJ109832 The biddjng proceeded. North East South West -----o do V-TU take? SUNDAY, SEPT. 8 Your birthday today: Finds you merging diverse resources from scattered origins to iorm a coherent, major plan of personal development. Choice of goals and methods is a primary fac- tor in your coming prosperity. Relationships tend to be spirited and spontaneous. Today's natives adapt to ex- terior conditions, despite reservations or beliefs that conflict. ARIES (March 21-April Be prompt with your share of community observances. Make rounds and linger nowhere Keep in touch with many people Events are un- expected, pleasant. TAURUS (April 20-May Social affairs expand both in number and cost and are worth it as long as you like those involved Health and technical advice is favored GEMINI (May 21-June Use your imagination. Creative projects thrive with news and encouragement from all sources. Spread your attentions among those you love CANCER (June 21-JuIy To a point, friends are useful, as is your help. Determine the difference now. Everyone ex- periences personal evolution. LEO (July 23-Aug. Thrift is important today. Take time to look at cor- respondence, listen to suggestions. Don't neglect someone expecting to hear from you. VIRGO (Aug. 23-Sept. Contacts made today are promising, potentially useful or profitable later Save your main effort for social activity and search for spiritual enlightenment. LIBRA (Sept. 23-Oct. Find methods of self- involvement in all levels if you are ready to and if you have goals Keep moving today for an abundance of positive ex- perience. SCORPIO (Oct. 23-Nov. Watch your budget and keep all enterprises operating nor- mally and moderately. Time to clarify your affairs should develop later today. SAGITTARIUS (Nov. 22- Dec. Unexpected in- vitations or chance meetings may be delightful and rewar- ding Beware of the tempta- tion to squander in your eagerness to be in the midst of activity CAPRICORN (Dee. 22-Jan Keep your notebook han- dy, remind yourself of impor- tant ideas. Observe abun- dance of events, some cf which will be evaluated and explained later. AQUARIUS (Jan. 20-Feb. Give everybody plenty of space and time in which to react Technical advice is favored, as is care and pi ecautions with health of you and your dependents PISCES (Feb- 19-Mareh Live and let live. Relin- quish past issues, particularly of this past week, and resolve to start fresh Visitors and their news prove encouraging MONDAY, SEPT. 9 Your birthday today: It's a fine year to further your education, to learn fresh skills and to try them out in a com- petitive world Your own children or those of other peo- ple bring continual ex- citement, perhaps occasional crisis. Relationships thrive, develop deep emotional ties Today's natives have a quiet. serious side to their gregarious, sociable nature ARIES (March 21-April Cope with issues and people close to you Creative ven- tures advance slightly. Take inventory, be sure nothing is left out or forgotten TAURUS (April 20-May What you've learned at work now brings results; present and promote it proudly. Give others plenty of time and space to change their minds, adjust schedules GEMINI (May 21-June Examine your situation and assume nothing about the future Leave behind incidents in recent past Resolve to make a fresh start at least in spirit Romance beckons the eligible. CANCER (June 21-July You can sell practically anything today if you believe in it. New contracts promise additional benefits. Home life settles somewhat LEO (July 23-Aug. Ask for advice discreetly. Check all details against facts, but get something going. Health counselling offers interesting perspective; you can correct something permanently VIRGO (Aug. 23-Sept. Unexpected social opportunity is at hand. Make full use of it. Be willing to replan, switch appointments. Work out new ways of adding to your cash reserves. LIBRA (Sept. 23-Oct. Important people back you but say very little. Finish neglected or by-passed oohgations, clear your files. Personal enterprises prosper, encounter fortunate coin- cidences SCORPIO (Oct. 23-Nov. Group or marital resources improve with little effort. General support comes from all sides. People trust your judgment even though they don't understand the whole situation. SAGITTARIUS (Nov. 22- Dec. Associates are help- ful you needn't distract them with details or remote considerations. Be receptive to strong expression of emo- tion and willing to declare vour own feelings CAPRICORN (Dec. 22-Jan. Demonstrate on-the-job skills by performance, not advertisement Negotiate sub- tle turning points, revise goals and take a different direction. AQUARIUS (Jan. 20-Feb. You have lots of energy- today Don't overdo anything or force issues among family and friends. Influential people readily express approval. Take time for thanksgiving PISCES (Feb. 19-March Be alert for useful ideas that arrive. Young people generate challenge and concern. Think in youthful terrr.s. whatever your age. Oddities in the news ATLANTA. Ga. .'API A United Stales frsighlsr Soaoeci with i2C prcfabricsl-jd nhousso and plaslic chrome and glass furnishings tc fill them 15 on its via> to Tiaf Saudi Arabia King Faisal ordered the liv- ing quarters and their fur- for some of his 3.000- inember family Others wili go for nurMis quarters at the King Faisal Specialist Hospi- tal Ncxi month. 3n the shadow of ihc king's p.iJace. S Tvorkmcrj assemble the rows of Kangsbcrry homes .Tisde by the Boise Cascade Corp The towr.houses will have shag carpels. ccriirai air conditioning and built in intercoms and AM- FM radio systems. I" S work crews are ex- pected to complete the con- struction task in 12 months The Saudi royal family is so Jarge because Faisal's father. Uie legendary King Ibn Saud, had 40 sons, and each of them, being MosSenj. was entitled to fo-jr V-T.CS FaisaJ himself is to hd.t had three a time- THAT LITTLE GIRL WON'T I 6E AROUND TODAH' TOMORROW SUNDAY.. WON'T HERE -1 I I HATE WEEKENDS SHORT MBS SHOW US YOUR BEST PUNCH, TIGER 1 WAD TCP BE ONE TO M AND LOIS I PIPN'T KNOW PAPPY LIKEP PLAVIN0 IN BUGSBMT BLOHDIE BLONDIE-- J WHERE'S TODAY'S I THREW IT OUT BY MISTAKE, BUT r SAVE YESTERDAY'S Burr READ 2f WONT UPSET" SO MUCH ARCHIE INFLATION 2 ON THE YOUR MACHINE is A GYP f V >l THAT'S Y DO VOU ALMOST A REALIZE A PENNY A HAS ENOUGH ENERGY TO FEED YOUF f Y EACH OF A VITAMINS i 6E EACM CONTAINS X _ 1 KJ SHLEMEEUOM.V-1LL IMffiEASH IT TIMES- PALEFACES wia BE t-t '-OS Occ AT OUR MERCY ANPMOW ARE THINGS WITH ;