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NEWSLETTER

VOL. 19, NO. 2, FALL 1997

INSIDE:

 

Construction Update

The Bakken is making steady progress on its expansion and renovation project. The walls are up, the roof/terrace has been formed, and workers have almost finished laying the stone facing. Inside the existing building, a considerable portion of the renovation work has been finished. With the capable assistance of our general contractor, the Mortenson Co., and our architect, Meyer, Scherer, & Rockcastle, a very complex project is being carefully and safely managed. Construction is due to be completed by September 1, 1998, with a grand opening to be held late in the year.

The Bakken has been closed to the public due to the construction work. The exhibits and our entire collection of books and instruments have been moved into storage for safekeeping (see story on p. 4). However, we have been able to continue our regular workshop programs for elementary school groups by renting space in a nearby school building. We have also continued to develop our mentoring program. Currently, we are helping three young people build robots that they plan to enter in a national robotics contest next year.

Most Bakken staff members have remained in the building during the construction, although it has required sharing tight quarters and enduring the typical disruptions of a renovation project. A few staff members have been working off site, including Elizabeth Ihrig, who has been temporarily officed in the Bio-Medical Library of the University of Minnesota, thanks to the kind assistance of Ellen Nagle, director of the Bio-Medical Library, and Elaine Challacombe, curator of the Wangensteen Historical Library. Fortunately, most of the office renovation work was completed by the end of the year.

The expansion and renovation of The Bakken will greatly improve the quality of our programs for students, teachers, scholars, and the general public. There will be new classrooms, work space for student and teacher science projects, exhibit areas, library space, and additional storage for the book and instrument collection. The project is being primarily funded by a generous gift from Earl E. Bakken, with additional major support from the Medtronic Foundation.

 

Hands-On Science Saturdays at the Bakken

A baby elephant's brain, preserved in solution and encased in plexiglass, dwarfed the human brain on display next to it. Does that mean that elephants are smarter than humans? Ninety-three visitors powered up their brains to figure out the answers to questions like these during The Bakken's March 22 celebration of National Brain Awareness week. Mark Rise from Medtronic gave a talk on how electricity helps nerve cells communicate and how neural stimulators implanted in the brain reduce the tremors of Parkinson's disease. Professor Orhan Ucer from the Department of Neurology at the University of Minnesota gave a slide show presentation on how to measure brain activity, and what abnormalities look like using EEG (electroencephalograph) readings. Shawne FitzGerald, an expert "phrenologist" from the Museum of Questionable Medical Devices, was on hand to give free phrenology readings with her psychograph, which measures the contours of the skull to determine personality type. Visitors dissected sheep and dog brains and then examined them under microscopes. These prepared brains were donated by Deb Lee in the Department of Veterinarian Pathobiology at the University of Minnesota. Dr. Victor Cox, also from the Department of Veterinarian Pathobiology at the University of Minnesota, lent the elephant, human and other preserved brain specimens. Visitors looked at nerve cells through a microscope, then made their own "brain cell" using fabric paint on sheets of mylar. Children made "nervous systems" using string and straws, and entered a brain coloring contest. Winners received a brain hat.

Free Admission Day on April 26 attracted 94 visitors who celebrated National Science and Technology week by exploring the bioelectric communication of bacteria, fish, plants and people. To see how magnetotactic bacteria navigate to find "down," children manipulated small bar magnets on a string next to a giant magnet representing the earth. Videos of live magnetotactic bacteria responding to magnetic fields were shown throughout the day, courtesy of Professor Dennis Bazylinski, Iowa State University, and Professor Bruce Moskowitz, University of Minnesota. Mimosa plants, which use an electrical signal to close their leaves in response to physical stimuli, fascinated visitors who would touch the leaves and then watch them curl up. Fish specialist Mike McPhee explained to visitors how fish create electricity to navigate and stun their prey. Children made a model electric eel to take home. A more ambitious project was the sleep alarm "make and take," created by curator Ellen Kuhfeld. This battery powered biofeedback device is mounted on the bow of eyeglasses and when the subject's head dips forward, a buzzer sounds a wake-up alarm. Tania Munz was on hand to direct visitors in a series of perception experiments.

Sixty-two visitors participated in "Tech Toys" on May 17, making a variety of fun and inexpensive physics toys to take home. For example, visitors holding a ping pong ball at one end of a straw and blowing through the other end, found that they could let go of the ping pong ball and it would stay put due to atmospheric pressure. Or, visitors could take a bottle cap with a hole in the center and push a straw through the hole. Presto! They have a toy that demonstrates Bernoulli's principle. A model of Ben Franklin's kite, 18th century static electricity toys, and a model of E.T.'s communicator were on display.

On June 21, a handful of visitors joined us in the park to explore Alternative Energy Day. Volunteers Chad Geppert, Colin Peterson and Brinton Ahlin built a solar hot water heater out of a black garden hose, which proved to be extremely effective on that bright, sunny 80 degree day. Chad demonstrated his fuel cell, constructed from a plastic hair curler and graphite paste. And Brinton displayed his wind generator, which used an airplane propeller blade, but was lacking the wind needed for actual demonstration.

These programs have been very popular with our visitors and we plan to resume Saturday programs when we re-open in 1998.

 

Dostale Promoted

Merce Dostale, who has served as The Bakken's Administrator since September 1994, was promoted to Assistant Director for Administration, effective April 1, 1997. This promotion recognizes the increasingly important role Ms. Dostale has played in managing The Bakken's finances, human resources, and general operations, particularly since The Bakken launched its expansion and renovation project. Congratulations-and thanks-Merce!

 

Frankenstein Exhibit Opens

The National Library of Medicine (NLM), inspired by a display at The Bakken, has developed an impressive exhibition entitled "Frankenstein: Penetrating the Secrets of Nature." The exhibit, which opened on Halloween eve with a masquerade reception, explores the origins of Mary Shelley's novel, first published in 1818, and considers its enduring appeal as it relates to several ideas: the promise of scientific advances and the accompanying fear of the radical power of technology; the assimilation of the "Frankenstein" myth into popular culture; and the ways in which contemporary scientific advances continue to confront us with profound social and ethical questions.

The idea for the exhibit was triggered by a visit to The Bakken several years ago by the director of the NLM, Dr. Donald Lindberg, and his wife, Dr. Mary Lindberg. A Minneapolis friend of the Lindbergs, Mary Lou Carpenter, arranged for Bakken director David Rhees to give them a tour. The Lindbergs were so taken with The Bakken's exhibit ("It's Alive: The Science and Myth of Frankenstein"), that they asked if we would help them create a similar show at the NLM, which we gladly did.

In addition to the wonderful rare books of the NLM's History of Medicine Division, the exhibit features items from many other libraries and museums. These items include the Smithsonian Institution's perfusion pump, developed by Alexis Carrel and Charles Lindbergh in 1935, a working "Jacob's Ladder" from the Science Museum of Minnesota (which also appeared in The Bakken's exhibit), and a large voltaic pile and a Medtronic Chardack-Greatbatch implantable pacemaker loaned by The Bakken.

The exhibit will be on display until August 15, 1998 and is located on the campus of the National Institute of Health in Bethesda, Maryland. A catalogue is expected to be published soon, authored by Susan E. Lederer, guest curator of the exhibition. The exhibit project was directed by Elizabeth Fee, Chief of NLM's History of Medicine Division. For more information, call 301-435-3270, or e-mail: frankenstein@nlm.nih.gov.

 

New Education Staff

The Bakken recently hired three new staff members who will add great depth and breadth to our educational activities. Dr. Patricia J. Hoben began work as Assistant Director for Education on October 1. Tania Munz, Education Assistant, began her position on September 2. On November 24, Eva Nielsen joined the staff as Administrative Assistant.

As Assistant Director for Education (a newly-created position), Dr. Hoben is responsible for guiding The Bakken's educational programs and staff. She comes to us with a strong combination of scientific, educational, and administrative training and experience. She holds a Ph.D. in molecular biophysics and biochemistry from Yale University, and has taught biology and chemistry at both the secondary and college levels. She has served as a science and technology policy advisor for the Office of Technology Assessment and the Department of Health and Human Services, and was Senior Advisor for Life Sciences Education to the Director of the National Institutes of Health. She also served as Program Officer for the Howard Hughes Medical Institute, where she developed and managed the Institute's grants programs in precollege and public science education.

Since moving to Minnesota in 1993 with her husband, Charles Carter, and their three children, Dr. Hoben has directed the research program of the Minnesota Public Utilities Commission on the effects of stray voltage on dairy herd health and production. She also has directed the Minneapolis component of the National Research Council's Project RISE (Regional Initiatives in Science Education), a program that promotes the cooperation of public schools, higher education, business and industry, and informal education institutions. In that context, she was instrumental in securing a $5 million grant from the National Science Foundation to help Minneapolis teachers implement local and state science standards and build a sustainable K-8 science program for the district. Part of Dr. Hoben's job at The Bakken will be to manage that NSF grant and foster closer relations between The Bakken and the Minneapolis public schools.

Tania Munz's background in science and the history of science has prepared her well for the role of assisting in the development and implementation of The Bakken's educational programs. In 1995 she earned a Bachelor of Arts with Honors from the University of Chicago in the history, philosophy, and social studies of science and medicine. While studying at Chicago, she also served as a laboratory technician in an electrophysiology laboratory. After graduating, she taught biology and chemistry at the École d'Humanité, an international boarding school near Berne, Switzerland, before coming to work part-time for The Bakken during the 1996-97 school year. We are pleased to welcome her now as our full-time Education Assistant.

Eva Nielsen recently joined The Bakken as Patricia Hoben's administrative assistant. Ms. Nielsen graduated Phi Beta Kappa from Luther College in Iowa with a degree in English. She comes to us after a year of teaching English in Slovakia and substitute teaching for disadvantaged youth programs in the St. Paul area. She hopes that both her experience as a teacher and her background in theater will enrich the new education programs to be launched next year when the museum re-opens. Part of Ms. Nielsen's time will be spent serving as staff assistant for the National Science Foundation grant project that Dr. Hoben is directing in partnership with the Minneapolis Public Schools and other local education institutions.

 

Treasures on Ice

by Elizabeth Ihrig

What do you do with an underground vault full of rare books and scientific and medical instruments and a museum's worth of exhibits as construction begins? That was the challenge facing the librarian and curator of instruments last February as plans for building a new wing and remodeling much of the existing building became a reality. These plans include the expansion of the vault and the opening of a doorway into the new wing (for improved access). We also knew that heavy equipment would be lurching over the ground above the vault, that asbestos abatement contractors would be working their magic in the vicinity, and that flying particles of dust and building materials could lodge themselves in the books, manuscripts, and instruments. For all these reasons, the over 11,000 books and journals and 2,000 instruments needed to be removed to a clean, secure space, away from the hurly-burly.

So we turned to a company recommended to us because they have experience packing, moving, and storing museum and rare book library collections. A tour of their storage facility satisfied the curator and librarian that its size, organization, conditions, and security were adequate for our needs. After that, most of our time and energy this past spring went into organizing the collections for the move and documenting the plans for moving. In addition, the curator packed some of the items that she felt uneasy entrusting to anyone else, and the librarian picked a few thousand books that are particularly fragile, unwieldy, or precious, and wrapped each in sheets of acid-free tissue paper.

At the end of April, the collections were closed to researchers. The packing crew arrived at the beginning of May and, working under the supervision of the librarian and curator, completed the packing and moving of the collections by the end of the first week in June. The books were carefully packed to preserve their exact order on the shelves, and the book collection filled almost 600 boxes. The boxes were arranged on pallets, 24 boxes to a pallet, then each pallet was shrink-wrapped and raised by fork-lift onto shelves in the warehouse. As for the instruments and other objects, large ones were carefully disassembled and the parts individually wrapped, while small instruments were wrapped in their cases. Then the instruments were packed into containers, some into "dishpacks" (18" x 18" x 28") and "speedpacks" (3' x 3' x 4') or in custom cases designed and built by the packing crew. Other instruments and some of the dishpacks and speedpacks were packed into wooden vaults measuring 6' x 6' x 8'. In the end, the instruments filled 120 dishpacks, 15 speedpacks, and 13 vaults. All were lifted onto shelves in the warehouse. In mid-September, one particularly large and heavy electrostatic generator was removed by crane from a second-floor exhibit room. It, too, is stored at the warehouse.

The packing and moving went smoothly and swiftly. This was due not only to the careful planning and organization that took place before the packers arrived, but also to the professionalism and cheerful industry of the crew. They can't be praised or thanked enough!

The collections will remain in storage until the completion of the construction and remodeling work. Then the second phase of the project will begin: moving everything back in, reassembling the instruments, and putting each item in its proper place. The expanded vault, which will include new compact shelving for more efficient book storage, will ensure that we will be able to continue to enlarge and enrich our internationally-renowned collection, to the benefit of the visitors and scholars who come to The Bakken.

 

Volunteers Needed!!!

Renovation and expansion are proceeding as scheduled. Even so, The Bakken will continue its popular elementary grade school workshops at an off-site location. These workshops have been extremely successful-nearly 4000 children attend them during the past year. In order to maintain the momentum of this worthwhile project we need volunteers-people who enjoy children, relate to them, and appreciate their curiosity, enthusiasm, and inquisitiveness. Our volunteers are richly rewarded by interacting with these children, helping them out, helping us out, and being The Bakken's goodwill ambassadors to the community.

Specifically, we are looking for workshop assistants who will assist the museum educator in teaching hands-on science workshops for 4th-6th graders. This involves preparation and set-up of supplies and demonstration tools and helping children with fun and easy science activities. Four daytime hours per week are available. Training is provided.

For more information please call Dorina Morawetz at The Bakken, 927-6508 on Tuesdays and Wednesdays 9:00 a.m. to 3:00 p.m. or other days and leave a message.

 

Recent Acquisitions

by Ellen Kuhfeld

 

Thunder House (first half 20th century)

Gift of Herb Sewell

Benjamin Wilson's 1778 An Account of Experiments Made at the Pantheon... discusses the debates over various types of lightning rod. That upstart Colonial, Ben Franklin, said that lightning rods should have points. The stalwart Englishman, Wilson, preferred balls. Lightning had recently hit a powderhouse, exploding the gunpowder, and getting the complete attention of the British government. Gunpowder overruled politics-they wanted the best protection, not necessarily the "English" system. The accompanying engraving from Wilson's Account shows a small house with a lightning rod being drawn beneath an electrified "artificial thundercloud" during the ensuing tests.

The thunder house became a popular demonstration. Metal traces showed the paths lightning could take. With only a small electric charge, the house could be blown to bits. The Bakken's collection includes a thunder house circa 1800. A modern replica of that house explodes in our video, Shocks and Sparks. Children love it.

Herb Sewell has given us three small thunder houses, a spark coil, and a Toepler-Holtz electrostatic generator. His father used them into the 1950s to sell lightning-rods on Machinery Hill at the Minnesota State Fair. A good demonstration never goes out of style! Between the 1950s and the 1990s, Mr. and Mrs. Sewell had the equipment "at the lake" where the children enjoyed playing with the sparks.

 

Theronoid Magnetic Belt

Gift of Daniel Ress

This magnetic solenoid coil fits around the human body, and fills it with a 60-Hz alternating magnetic field. In 1928 Philip Isley, manager of the Cleveland Ionaco office, split from the Iona company, which sold a similar device, and started the Theronoid corporation.

In 1928, as today, some people claimed that magnetic fields were good for the health, some that they were bad, and some that they had no effect at all. A 1929 report of the National Better Business Bureau does a better job of documenting the passions of this debate than the usefulness of Theronoid treatment.

Today's powerline dispute suggests that Theronoids are a part of history to avoid if you fear childhood leukemia or controversy.

Even those who fear the worst see chronic exposure as the danger. A short demonstration should cause no harm. The Theronoid will go into our newly-created educational collection. It has a demonstration coil, a smaller lightbulb-bearing coil to fit inside the larger one. It glows to prove the existence of an energy field. (It proves nothing about the benefits or hazards of that energy.) It will let us discuss medical disputes, and the many-faced nature of "proof." Good arguments are as effective as teaching tools as exploding thunder-houses are.

 

Volunteer News

The Bakken honored volunteers with certificates of appreciation. Craig Rudolph and Dick Granquist share the honor of "Volunteer of the Year." Craig is a five year veteran of the workshop program with over 300 hours of service; Dick has given workshop presentations for four years and has donated 250 hours of service. Charles Henderson earned special honors for his superb efforts in developing hands-on activities for two Saturday programs. Also honored was Dale Hartman with four years and over 400 hours of service. Dale was named "Volunteer of the Year" in 1996.

Special thanks to Chad Geppert, Colin Peterson and Brinton Ahlin who were at the heart of the Saturday programs this year (see article on page 2). Thanks also to Samantha Peterson, and Stephan and Donna Ingvarsson for their enthusiastic efforts in the elementary workshop program.

 

Current Events

by Ellen Kuhfeld

 

The Spark of Life

Some recent scientific studies suggest that lightning may play an important role in determining the chemical make-up of the air and even the soil. Bruce Railsback of the University of Georgia gathered rain samples at intervals as short as 90 seconds. The samples collected when he heard thunder - meaning lightning in the storm - had an average pH of 3.63. This was more than double the acid found in rain that fell from silent skies (average pH 4.05).

Railsback noted that thunderstorms produce ozone and nitrogen oxides. Both can oxidize sulfur dioxide pollution into sulfur trioxide, which forms sulfuric acid. Nitrogen oxides can form nitric acid. "Lightning presumably contributes to the [acidity] of summer rainfall in the eastern US," he observed.

Colin Price, at the Lawrence Livermore National Laboratory, used satellite photos and the U.S. Lightning Detection Network to take a census of lightning flashes. He estimates that lightning produces 10 to 15 million metric tons of nitrogen oxides per year, which would make it the largest natural source of fixed atmospheric nitrogen. Some estimates, like those of atmospheric chemist Pud Franzblau of New Mexico, are as high as a billion tons per year.

Another name for nitrogen oxides is "fixed nitrogen," essential to plant growth. You can love them as fertilizer, hate them as acid rain, or wonder if agricultural nitrates are adding to lightning-fixed nitrogen to cause pollution but, obviously, lightning is a larger player in the story of life than we had thought.

New Scientist, May 31, 1997
New Scientist, January 25, 1997
Discover, September, 1995

 

Microwaves for Life

One lingering side-effect of warfare is landmines. They kill more than 12,000 people every year, and make large areas of Angola, Afghanistan, and Cambodia unsafe. Mines are hard to detect for what soldier wants the enemy and their mine-detectors creeping silently through the minefield at night? So what's a poor farmer to do when the war and the soldiers go away, and the mines remain?

Lawrence Carter and a team of researchers at the University of Auckland, New Zealand, have an answer. They use microwave energy to heat the moisture in the soil, just as a microwave oven heats the moisture in your dinner. Plastic mines have no moisture and, therefore, remain cool. Infrared goggles then let minesweepers see suspicious areas.

New Scientist, August 2, 1997

 

Happy Birthday!

J.J. Thomson announced his discovery of the electron on April 30, 1897. Thomson's colleagues at the Cavendish Laboratory offered this tongue-in-cheek toast: "The electron: may it never be of use to anybody." Few toasts have failed so spectacularly.

A century later, the electron still has secrets. A team of Japanese and American physicists has probed its depths with particles accelerated to 58 GeV. They penetrate far enough into the electron to experience a higher central charge, normally screened by a surrounding cloud of virtual particles. If we are very fortunate, this discovery will turn out to be as useless as the electron itself.

New York Times, April 28, 1997
New Scientist, January 25, 1997

 

Visiting Research Fellowships 1998

The Bakken Library and Museum offers visiting research fellowships to facilitate the use of its collection of books, journals, manuscripts, prints, and instruments for research. The focus of The Bakken's collections is the history of electricity and magnetism and their applications in the life sciences and medicine. Related materials include mesmerism and animal magnetism, 19th century ephemera concerning alternative electromedical therapies, miscellaneous scientists' letters, and trade catalogues. The instruments include electrostatic generators, magneto-electric generators, induction coils, physiological instruments, recording devices, and accessories.

The fellowship maximum is $1,300, to be used for travel, subsistence, and other direct costs of conducting research at The Bakken. The minimum period of residence is one week. The grants are open to all researchers. The deadline for applications for 1998 is March 2, 1998. Please keep in mind while making your plans that, because of construction and remodeling currently taking place, The Bakken will not be open to researchers until the fall of 1998. For application guidelines and further information, please contact: David J. Rhees, Executive Director, The Bakken Library and Museum, 3537 Zenith Avenue So., Minneapolis, MN 55416, U.S.A. (telephone: 612-927-6508; fax: 612-927-7265)

 

E.T. Phone Home!

Accidentally left on earth by his fellow travelers, E.T., the extraterrestrial star of Steven Spielberg's popular film, was desperate to contact his home planet. The mysterious communicator he assembled from everyday items found in Elliot's house sent a signal that reached his extraterrestrial family.

On a visit last fall to the Chicago Museum of Science and Industry, I saw E.T.'s communicator on display. It occurred to me that it might actually work and, if so, would be an exciting project. A few months later, I discovered an E.T. movie home page claiming that the communicator did, in fact, work and that it was designed and built by Henry Feinberg. Knowing nothing more, I committed myself to building a working replica for the May 14 Tech Toys Program.

In February, volunteers Chad Geppert (age 14), Colin Peterson (age 12) and Brinton Ahlin (age 10) offered to help unravel the mystery, and they quickly took over. They started by viewing the movie and noting the materials used (umbrella, turntable, sawblade, coffee can, etc.). They speculated as to how it may have worked and what the parts were used for. They began to suspect that not all of the materials collected were actually used in the commmunicator. The key to unlocking the mystery was contact points that our curator, Ellen Kuhfeld, spotted on the sawblade. From this observation, she was able to suggest a theory as to how the device might work. The volunteers gathered the materials and started putting it together. They took apart a "Speak and Spell" and figured out how it was wired and the code for each of the letters. They asked the staff at the Pavek Museum how to build a microwave transmitter using a "fuzz buster." (The answer: Don't! It emits potentially dangerous microwaves). They then settled on sending and receiving the signal with a set of toy walkie talkies. At one point they did an internet search for the elusive Henry Feinberg. Margy Balwierz, a teacher who was helping with the project, offered to call the resulting list of eleven Henry Feinbergs, and soon the boys were talking to the device's inventor.

Of course, not everything went smoothly. The "Speak and Spell" Margy donated shorted out, but Colin's mother found another at a yard sale. There were many problems soldering hairpins onto wires, and inserting the pins into a coathanger. And what was the best way to put contact points on the sawblade? But the volunteers persevered through all these difficulties and came up with some ingenious solutions. We were all tremendously excited the first time we heard the device haltingly spell out "H" "E" "L" "P."

The efforts culminated with a request from producer Lisa Blackstone of Newton's Apple, who asked the boys for permission to use their invention to introduce one of the shows. They brought their device to the studio and were treated as regular crew members. The boys did some last minute hook-ups and "tweaking," then tested the device on the set. They instructed Newton's Apple hosts David Huddleston and Eileen Galindo on how to use the device, then sat back and watched as the cameras rolled. The segment, "Kids on Mars," aired in December.

 

Musical Notes

For nearly 20 years, musicians and listeners have shared Sunday afternoon chamber music events in the Great Hall. This year the renovation and expansion of our building have required The Bakken Trio and the Musical Offering to hold their concerts elsewhere for much of the season.

The members of The Bakken Trio-Stephanie Arado, Judy Lin and Katja Linfield-investigated alternative spaces to serve as a "home-away-from-home" for the series and its audience. They believe that the historically significant Southern Theatre in Minneapolis offers comfort, intimacy, excellent acoustics and an atmosphere for both serious listening and good conversation. The first three concerts of the season will take place there. The season will conclude with a gala "homecoming" concert at The Bakken on Sunday, May 10. For ticket information and subscriptions please call (612) 257-7030.

The Musical Offering will perform two concerts in the Great Hall on Sunday, March 22, 1998 and Sunday, May 3, 1998. For ticket information please call Georgia Lauritzen at 641-2197 or Rees Allison at 641-2231.

Concert dates:

The Musical Offering

Sunday, March 22, 1998, 4 p.m.

Sunday, May 3, 1998, 4 p.m.

 

The Bakken Trio

Sunday, May 10, 1998, 4 p.m.

Takemitsu Between Tides for Piano Trio
Peter Scott Lewis Piano Trio (1997) World Premiere
Ravel Piano Trio in A minor

Special Guest: Peter Scott Lewis, composer

 



The Bakken
A Library and Museum of Electricity in Life

3537 Zenith Avenue South
Minneapolis, MN 55416-4623, USA

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© The Bakken Updated: April 6, 2007

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