 He published a book, "The Longitudinal Muscle in Esophageal Disease" about his conclusions concerning the esophagus obtained from a lifetime of experience in radiology.Among his conclusions was that achalasia and barrett's esophagus are not unique diseases, as has been traditionally thought, but a subset of hiatus hernia.A lifelong entrepreneur, he founded Scientific Sports Equipment in 1963 to manufacture and market his invention of a practical optical bowsight.