lecturer at Northwestern University, University of New York, and State University of Iowa. As to positions in the field of forensic chemistry and toxicology, he was criminal laison for the Gainesville, Florida Police Department, Director of the Florida State Poison Information Center; State Criminal Laison for the State of Iowa, Chief Deputy Coronor and Toxicologist for the Polk County Coronor's Office in Des Moines; Toxicologist for the Iowa State Poison Information Center. He is a member of the American Academy of Forensic Science, the American Medical Association; National Safety Council Committee on Alcohol and Drugs, including the Executive Board of that Committee; Society of Medical Jurisprudence, and International Association of Forensic Toxicologists. As to experience, Dr. Dubowski was State Criminalist in the examination of physical and biological evidencematerials, including blood and body tissues for the presence of alcohol and for other poisons in the State of Iowa and in the State of Connecticut the examination of suspected drinking drivers and the effects of alcohol. In regard to teaching or instructing in the State of Oklahoma, Dr. Dubowski participated in the first course in chemical tests for intoxication at the University of Oklahoma in Norman in the Peace Officer's Extension Program at the Kellogg Center. In addition to these qualifications, the record discloses that Dr. Dubowski has attended and participated in the Northwestern Traffic Institute at Evanston, and that he is thoroughly familiar with the various types of machines used to analyze breath samples for alcoholic content.
*557 After thus having qualified as an expert in the