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40 GU I D E to Y E L L OW S P R I NG S | 2O22 – 2O23 oped in Yellow Springs. Known worldwide, it is at the core of 90 percent of the measure- ment instruments made by Yellow Springs Instruments, Inc., which is now owned by Xylem. Clark left Yellow Springs for the University of Alabama at Birmingham in 1958, lured there by the chance to con- tinue work on the heart lung machine. Open heart surgery was still largely an experimental procedure, performed exclu - sively on infants; the research opportunities provided by the University of Alabama held the promise of wider application. “It was like having a tiger by the tail,” said Clark. “It dragged me from this small town into the world of medicine and surgery and great competition.” The heart lung machine he had invented — and never patented — soon spawned other, more advanced machines. Open heart surgery, considered “sac - rilegious” because it “interfered with God’s handiwork” when Clark began work on the heart lung device, became common - place. Clark turned his atten - tion to postoperative care, helping establish one of the nation’s first critical care units in Birmingham. His work was also “one of the little noises” that linked psychological disorders to chemical imbalances, leading to the development of clo- zapine, a drug he described as the “penicillin of schizo - phrenia.” At the time of this article’s publication, Clark was working on perfecting a formula for arti - ficial blood, a sterile substance that would eliminate problems associated with blood type matching and disease transmis- sion. He also had many more projects he wanted to finish. “The more you know, the more you’re interested in, and the less time you have to do all the things you want to do,” he said. “It’s a bum design.” In 1990, Clark moved his lab facility from Children’s Hospital in Cincinnati, where he had been since 1968, to Yellow Springs, returning as a research professor of biological sciences at Antioch College. His lab was on the third floor of the old Battelle-Kettering Lab, and served as a model of research in progress for Antioch stu - dents, said Clark. He hoped it would inspire future generations of scientists, as excited with the world of science, as eager to explore and challenge as he was. “My whole world depends upon knowledge and information,” he said. “That’s where I live. That’s my whole lifetime.” Clark died in 2005 at the age of 86. with more than 25 pat- ents to his name and a number of honors under his belt. Though he never perfected his formula for artificial blood, true to his word, he pursued it to the end of his lifetime. ♦ UrologySpecialistsOfOhio.com • 937-342-9260 Offices in Beavercreek, Springfield and Xenia Eric Espinosa, M.D. Board Certified Urologist • Urolift-Prostate Procedure • Erectile Dysfunction • Botox & Biofeedback Treatment of Incontinence • Bladder Cancer • Vasectomy • Kidney Stones • Laser Treatment of Prostate Bobbie Haines • Dawn Bradstreet, CPA • Mark Bradstreet, CPA Your place for cool treats and tasty eats! OPEN DAILY! 101 S. WALNUT ST., YELLOW SPRINGS, OH WWW.YSCORNERCONE.COM • LIKE US ON FACEBOOK! NOON–8:3O PM MARCH–OCTOBER