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About Medford mail tribune. (Medford, Or.) 1909-1989 | View Entire Issue (May 11, 1961)
MEOrORD MAIL TRIBUNE. MEDFORD, OREGON THURSDAY. MAY 11. 1961 Rapid Spinning of Tiny Steel Spheres Tool for Scientists New York, N.Y.-(Scientlflc American Feature) Steel spheres no larger than those that tip ball-point pens are now being made to spin fast enough to roll from New York to San Francisco is less than an hour, about 1.5 million revolutions per second. At such speeds the minute spheres develop a billion times the force of gravity and when urged to spin even a little faster they explode. Why spin little spheres so faSt? : The answer . is simple ac cording to Jesse W. Beams, professor of physics at the University of Virginia. "It's fascinating," he says. ; mm A W i fit' I jpjjP Show detail 12 Ct. Premium Quality Solitaire Diamond Ring No Money $ Cf7A50 Down y 279s Dainty fishtail setting 1 4k yel low gold only 4 out of 100 dia monds are good enough for the name Tradition. 1 Ct. Total Wt. Premium Quality Diamond Set No Monty Down '369 50 Exquisite reflector setting. Bril liant center diamond. 6 dia mond wedding band adds ele gance. ."Satisfaction guaranteed . or your money back" SEARS 501 East Jackson SP 3-6661 Open Mon. t Frt. 'Til 9 p.m. FREE PARKING In the late 1920s, according to Dr. Beams, he and Ernest O. Lawrence were looking for a way to make high-speed photographs of the break down of electric sparks and of other phenomena of very brief duration. They finally hit on the Idea of mounting a mirror on a high-speed tur bine that was spun by a jet of compressed air. "The Belgian scientists," Dr. Beams ex plains, "had conceived the simple idea of spinning a small fluted rotor on a Jet of air. The xotor is raised from its resting place by te air stream and automatically seeks a position in space where its weight is just coun terbalanced by the pressure of air from ,below. By this scheme, the Belgians were able to spin small rotors, an inch or less In diameter, to several thousand revolutions per second and to produce centrifugal j fields of force about 1 million times greater than gravity. Adapting their rotor to our needs constituted my introduction to high-speed rotation, s ,-.,: ,. "The question then arose as to whether we could use a simple air-driven rotor for spinning solutions and there by increasing the rate at which materials in suspension would settle to the bottom, such as the large organic molecules that interest biolo gists. The answer proved to be yes, But we soon encoun tered limitations to the upper spedds that could be attained. Air friction created serious heating problems. "We then undertook to build 'ultracentrlfuges' in which the rotor (up to foot In diameter), could be spun in a high vacuum. One of the most difficult problems was the development of a practi cal vacuum-tight - oil gland for the shaft that linked the air turbine to the rotor. This was finally solved and ultra centrifuges of this general type have been the principal work horses of molecular sedimentation experiments in this country for the past 28 years. Involved Work of Many "It was only a step from this development to the use of electrical drives and mag netic bearings, although tak ing that step has involved the work of marjy scientists and graduate students for more than two decades. The rotors of our current machines take the form of steel spheres. They are supported In an an evacuated space by electro magnets, the strength of which is controlled by the po sition In space of the sphere, If the sphere tends to drop, more current is sent through the electromagnet; to fall, less current. Rotary motion is Back Stairs: The Red Fox Tavern By MERRIMAN SMITH UPI White House Repottm Washington - (UTS - Back stairs at the White House: Down in Middleburg, Va., where President and Mrs. Kennedy spend the week ends, those who are not fox hunt ing or tooling around the country lanes in their Jag uars may be found frequent ly in an ancient establish ment known as theRed Fox Tavern. The history of the Red Fox dates back to the 18th Cen tum, the latter part, natural ly, when George Washington Refrigerator Cars Derailed in Yard Wenatchee X; ami - Five Great Northern refrigerator cars were derailed in the train yard here Wednesday. No one was injured. 't w The cars jumped the tracks when two connected ears started rolling - and ran into three others which were not yet clear of a rail switch. Heavy damage resulted to at least two ot the cars. , A Great Northern spokes man said the damage total would be "no slight bit." How ever, he declined to make an estimate. -.. ." .' ' CALLING ALL CARS Columbus, Ohlo-WPD-PoHce here received a telephone call Wednesday from1 an excited man who said, "there's a man with a gun at 90 W. Gay st." Alert radio dispatchers imme diately ordered two - patrol cars to the scene. Then they grew more alert and canceled the order; 90 W. Gay st. is Columbus', police .headquar imparted to the sphere by an alternating magnetic- field, of the same sort that drives the rotors of ordinary induction electric motors. It turns out that the friction of our mag netic support 'bearing' la too small to be measured. A 30- pound rotar coasting . at 1,000 revolutions per second in a high vacuum loses only about one revolution per second per day. In other words, the ro tor could coast for more than two and a half years after the power is shut off. . . "What good are high-speed rotors? in addition to provid ing biologists with a power ful tool for separating giant molecules, they can also be used for fractionating nu clear fuels and for determin ing the mass of other mate rials. They provide the high est sustained speeds that can be achieved mechanically in a small laboratory, as well as the highest sustained accele rations attainable by any means. These two attributes make it certain that scien tists and engineers will con- tine to find new uses for the techniques of ultrahigh-speed rotation. ' - may have dropped in to have an ale while his wig was be ing powdered. The Red Fox usually has eight or ten rooms available for weary travelers, plus a large brick-walled and oaken beamed dining room. This opens into a subterranean tap room with the architectural sturdiness of a colonial pow der magazine. The front of fice is a small enclosure at which one is tempted to step to the wicket and place a couple of bob on her majes ty's entry in the Balmoral Cup. : . i The second floor ot the Red Fox is a rather doubtful area; doubtful in the 'sense that the only space seems to be an ex pansive sitting room and there certainly must be more to the second floor that that. The atmosphere Is suggestive of hidden rooms and secret panels that slide open noise lessly when a burnished nob atop the newel post on t h second floor landing is turn ed knowledgeably. Early Door-Belting The Red Fox has no need whatever for the services of a house detective. The sonic condition of the stairs and flooring supplies more infor mation than a platoon of house dicks. Besides, the front doors are bolted and locked at a relatively early evening hour. Woe betide the night traveler, dusty and weary he may be, who presents him self after the door-bolting. Many may call, but few are admitted. The night clerk who also is the day clerk quite understandably does not like being fetched down the melodious stairs from . his chambers far above. 1 . The sleeping rooms are on the third and fourth floors of the Red Fox and most of the furniture is genuinely an tique, some pieces to the point of charming frailty. A room with a view of the main street of Middleburg is not regarded as, particularly fortunate be cause large trucks rumble through the village at night, giving the front room sleeper a momentary sensation of hav ing been ridden down by the cavalrymen of centuries past. About the only concessions to modernity have been elec tric lights, running water and foam rubber mattresses on the quaint, canopied four-poster beds which once led a citi fied visitor to inquire, "Who sleeps In those crazy uppers?" Ham and Frog Legs The President and the first lady to date have had no di rect connection with the Red Fox, although their Influence is unmistakable and since most of the people around Middleburg sooner: or later visit the Red Fox, the Ken nedy's probably will drop by in due time, possibly while the President's wife is run ning down early American, furniture for the White House. The Kennedy influence seems most reflected at the Red Fox in the tavern's recent acquisition of a rather well known French chef . whose souffles . were "so ' excellent that two Washington .restau rants once sued tor his serv ices.: ,:! f : The Red Fox la managed by Mrs. Nettie Michaelis who looks much more like a col lege senior's dream for prom week than a Revolutionary War innkeeper. Mrs. Michael is sees nothing inconsistent in having a French chef and haut cuisine on the menu in an inn so otherwise steeped 1 in basic Americana. ' Nevertheless, it Is down-1 right disconcerting to see on the same menu with baked Virginia ham such things as frog legs provencale and bou illabaisse. It might help If they called it "Ye Olde Bouil labaisse." ' HELPVy) US! We Mod clothlnf, ihoai, disk, furniture, and keMinaj. Wo Pick Up. HELP OTHERS! The Salvation Army 30 N. Holly SPrine 1-73JS . ! --fee ' ' BP Reach for the bread that stays fresh days longer! Buy Holsum and get to enjoy all the bread you buy, New Miracle Wrap keeps Holsum fresh from end .. .to end! Buy The Premium Loaf Tod ayl i ; i i i u I OUR MOTHER'S DAY GIFT TO ALL MOTHERS! mm$ I mil pouble II MR Thursday Eve, All Day Friday & Saturday - oh all purchases throughout the store - J - ----(Excluded are alcohol & tobaccos) . , J FRITOS Demonstration Friday and Saturday from 1:00 to 9:00 p.m. Both Days. Reg. 49c Bag of FRITOS - 45c Plus FREE can of Bean Dip ' - . r "----i PORK & BEANS , ANANAS 1 Hunts araa 214 cans. Ran. 20. ; . " MaV"Mk M aV"SaV W , I . . . , ... 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