Lethbridge Herald, The (Newspaper) - June 11, 1970, Lethbridge, Alberta
14 THE LETHBRIDGE HERAID Thwday, Juno 11, 1970 POLISHING MACHINE This mirror-polishing machine was built specially for the Westar 157-inch mirror at a cost of In the foreground is the 137-inch, pound polishing tool that is placed in the machine behind it. The mirror blank is placed on a special table in the machine, and the tool is rotated by the arm above it. The polish- ing process will take about four years, shaping the mirror surface into a hyperbola with- in a one-millionth-inch accuracy. The work will be done in Vancouver. LARGEST IN WORLD This 157-inch diameter piece of fused silica is the largest in the world. It is two feet thick and Ihe hole in the centre is three feet in diameter. Standing behind the mirror blank is George Mann, the Corning Glass Works engineer who dveloped the fused silica process, and G. J. Odgers, director of the Dominion Astrophysical Observatory in Victoria, B.C. The mirror blank weighs pounds, and its top surface has been shaped to within one-quarter inch of its final hyperbolic, concave design. The blank actually serves as the base support for Ihe real mirror, which is an extremely fine coating of aluminum. The central hole is an important part of the mirror's design, allowing special observation and construction techniques. The mirror will be the second-largest in the world, and is equal to the superior-sized 200-inch Mt. Palomar mirror. When grinding, polishing and coating of the mirror are completed, it will be worth about million. Six Universities In Million Project U of L To Share Largest Telescope BY JIM all assets of the professor of physics, Herald Education Elizabeth Telescope will attend the ceremonies Westar Consortium at Vancouver, and Dr. Owen As of Friday, the in dean cf arts and sci- sity ol Lethbridge will be Western definite part cf a project Astronomical universities' move to ed at building a 157-inch six universities: the observatory began in flecting telescope of L, University of when the Queen Elizabeth in British Columbia that will of Alberta, project was scrap- equal to the best and of British Columbia, in an austerity move. in the of Victoria and site chosen for the tele- The ?10 million project in Kingston, Mt. Kohau, near Pentic- start formally when J. U of L representatives B.C., will be the site of the Greene, federal minister of consortium's board of Observatory. ergy, mines and resources are Dr. Earl Milton, million estimated Teachers', Trustees'' Plan For Summer The teachers1 and is designed primarily negotiations, but warn that trustees' associations employers' association conditions as well as Lethbridge and Medicine regional must be included in will meet separately discussions and changes times during the summer ATA locals in existing conditions are al- prepare proposals for Medicine Hat formed certain to be a major tiations in lie fall, oficials association May of the teachers' proposals. the two groups the add that other difficul- Jim Anderson, a Regional Economic will include the differen1 communications consultant for the Alberta Teachers' for the same salary schedules in the two cities Lethbridge tion, said teachers' representatives from the two cities would likely have their two new groups were formed as a result of changes in the Alberta School Act tend to be higher in the lower ranges, but Medicine Hat salaries are much higher ready for a late September or early October presentation. John Boras chairman of Act which allow regional bargaining and the top ranges. Teachers say they will de- trustees' association employers, which were identical pay for both the two cities, said his will also meet during the new School Act will first general increase dis- mer, and will be ready to m effect until Aug. 1, by Lethbridge teachers the teachers at any negotiations could about 14 per cent (com- The trustees' group, started until after that to the 7.35 per cent they the Lethbridge-Medicine say they do not in their 1969-1970 con- City School Authorities too much difficulty in tion, was formed April goal was for an eight per cent average settlement that was before city union settled for in- Senda cf of more than 10 per this spring from 16 College of Art, all Alberta school dis- Alberta Institute of limited to over-all six per LETHBRIDGE following a budget increases under LODGE cf studies in department of education and general crafts. She it is likely a hard EVERY THURS.- 8 a scholarship of negotiations will de- in her field of and a spring teaching in both Lcthbndgc and Medicine Hat is a possibility. RESIDENTIAL COOLING is also the possibility further school districts join- CHARLTON HILL the Lethbridge-Medicine Hat association. 1262 2nd AVE. S. PHONE the Alberta School Trus- southern Alberta regional June 22, some discussion will take place between FED officials and the Southern Alberta school Authorities 1 bV Wl whicli includes 10 rural school boards. Sick and tired of punching that clock? Here teachers' executive in- an opportunity to be your own boss. We need Keith Freeman, of Medi- sible agents and dealers to open untapped areas Hat as chairman, Jim Western Canada, Excellent profits to right of Lethbridge, vice- Fully protected areas. We rain you Helen Appleton, of Hat, secretary, and FOR FULL INFORMATION Eislcr of Lcthbridge V1NAL treasurer. The trustees' executive includes John Boras, of leth- OF as chairman, Dr. D. B. 10125 82nd Avo., Edmonton Phono of Medicine Hat, vice-chairman, and Bert Hollander, Lethbridge, as secretary. cost of the observatory will come from a six-year fund-rais- ing drive the universities plan to undertake: none cf the mon- ey will be taken from univer- sity operating or capital bud- gets. Funds for the telescope will be sought from private most of whom would not be willing to donate money to universities for any purpose but research. University and. Westar offi- cials emphasize that no money for the project will be taken from their capital or operating budgets. Several large donors have already indicated their inter- est in the Westar Ob- servatory. Dr. Milton says he expects the observatory to be operating by about 1977. The existing assets of the project which Mr. Greene will give the universities in- clude the mirror blank, worth grinding equipment worth almost pages of engineering data and design work worth site servicing, access road and other equipment. The pound mirror blank is of fused silica, made at the Corning Glass Works in Bradford, Pennsylvania. Its dia- meter is 157 feet, one it is two feet thick. It is the largest pitce of fused silica in the world. It took a month to ship it frcm the plant to Vancouver, mostly via Canadian National Railways. It was packed in a pound crate and sur- rounded on the CNR flatcar by bullet proof steel plates to pro- tect it from disasters: people have in the past shot at large telescope mirror blanks. The mirror blank surface was shaped in a hyperbolic form when it was poured, and has a three-feet hole through its centre. It will be ground and polished to within one-millionth of an four-year task costing about A 100-inch diameter alumin- um testing mirror will be ground first to insure the exact- ing precision of the final silica mirror. After it has been ground, the top surface will be coated with in a layer so fine tot less than an ounce cf the metal will be used. (Silica glass is used as the backing for .ho aluminum, which is the ac- .ual mirror surface cf the tele- scope.) The observatory will be at ;he G.200-foot top cf Mt. Kcbau, n a dome costing about mil- lion. The telescope itself will be iTOrth more than million, and other equipment will cost at east million. The top of the telescope's 100- on dome will tower more than 200 feet above ground level. Westar hopes to develop a space museum) at the observa- tory site, and plans to make it a tourist attraction if the Brit- ish Columbia government will maintain the 12-mile access road. The site offers about 100 nights hours) of excellent dark-observing time annually, half in summer and half in win- ter. It will have the advantage over most other telescopes in the world that it looks out into deep space from the Earth's northern hemisphere, rather (han into the centre of the Milky Way galaxy as equato- rial telescopes do. The mirror will have a focal length of about 4-ffl inches, meaning that light from the mirror's surface will focus to a pinpoint at a distance of 440 feet. The only larger reflecting telescope in the world is the Mt. Palomar Observatory's 200 inch facility in California, built during the 1930s. Westar's 157- inch mirror will be of equal ef- ficiency to the larger mirror. The 200-inch diameter is the largest practical size for a mir- ror that must receive its light through the atmosphere, al tbsugh the Russians recently tried to pour a 250-inch blank, which broke. The mirror acts like the side of a shaving mirror that makes the face smaller. It focuses the light it receives so that even- tually a much-smaller picture is seen, of concentrated star- light. In order to make the tele- scope's physical length practi- cal (its 37-foot focusing distance would make construction diffi- cult and cause other technical problems) the light is "folded" by the instrument. About 15 feet from the main mirror there is a much small- er mirror facing towards it, which again focuses the image and directs it through the cen- tral hole in the largsr mirror. Where it focuses, a camera or television system or spectro- scope or other instrument is placed fsr various data read- The whole system is mount- ed on a base anchored to the mountain's bedrock, and the lefescope's tracking gears can move the hundred-ton system so precisely that it can track a star a million light years away with pinpoint accuracy throughout the night. The reflecting telescope sys- sn is much-superior to the re- racting telescope, which works ji the same way binoculars do, jy focusing light through a lens rather than off a mirror sur- face. When light must go through a lens it is subject to impuri- ties and optics! inaccuracies j that limit practical lens diam- eter to about 40 quarter of the Westar mirror's size. Dr. Milton said U of L scien- tists are pleased with their op- portunity to take part in the Westar project, since it puts tire university in an equal position with other, much larger cam- puses. Needham Named Conductor Of Lethbridge Symphony Professor Lucien Needham. chairman of the University of Lethbridge music department, has been named conductor of the Lethbridge Symphony Or- chestra for the 1970 71 term. Professor Needham, who conducted the orchestra in one regularly scheduled perform- ance this past season, is direc- tor of the University of Leth- bridge Choir and head of the university's concert series. An honorary Fellow of the Guildhall School of Music, Lon- don, he followed up extensive music training in Britain with the position of permanent con- ductor of (lie 165 voice Winni- peg Philharmonic Choir. He has conducted choirs, so- loists and the Winnipeg Sym- phony Orchestra over the CBC national radio network. In 1961, he accepted an ap- pointment as principal profes- sor of singing, organ and theo- retical subjects at Brandon Col- lege School of Music. He sub- sequently formed and conduct- ed the Western Manitoba Phil- harmonic Choir. A composer, adjudicator and former church choir director, Professor Needham was ap- pointed to his present univer- sity position in 1967. He succeeds Wilfrid Wool- house as orchestra conductor. The Lethbridge Symphony Association also announced that Jack Langford, principal of Hamilton Junior Htgh School, has been elected presi- dent ot the association, suc- ceeding Nat Olson. Mr. Langford, organist at McKillop United Church, is cur- rently engaged hi a master's program in school administra- tion at the University of British Columbia. Other executive members are: Dr. C. A. Palmer, first vice president; L. M. Frouws, second vice president; M. J. Thomas, business manager treasurer; and Jean Robinson, secretary. SMILEY'S PLUMBING GLASS LINED WATW HEATERS S120 AND UP Phone 328-2176 WEST COAST SEAFOODS Trucldoad Sale of FRESH FSSH SEAFOODS Will Be Held At FORT WHOOP-UP SERVICE Thursday, June 11 and June 12 From 1 1 a.m. to 8 p.m. FRESH FISH ON ICE NOW IN GOOD SUPPLY Professor Lucien Needham Girls are nicer than Boys! We don't think there is much argument about thai even the boys will agree! But at your place of business you'Ii find girls are very useful, as well as being an attractive addition to any staff. Right now, hundreds of female students are regis- tered with Canada Manpower, seeking part or full time summer employment They have a great variety of job qualifications, and most importantly, they are all eager and willing to work hard for you. FM! :har fob vacancy with a female student you'll be glad you did. Get Yourself A Girl call 327-8535 CANADA MANPOWER CENTRE This advertisement Inserted by The Lethbridge Harold as public service in support of the Hire A Student Campaign.