Eckart W. Schmidt, Consultant, Hazardous Materials Bellevue, WA 98007, USA. Dr. Schmidt is a retired rocket propellant chemist still active in consulting, teaching, and writing books. During the time span between 1968 and 2001 he has already published three books on rocket propellants and hydrazines. Dr. Schmidt retired from Olin Aerospace Company in 1995 and is volunteering as Affiliate Associate Professor in the Department of Aeronautics and Astronautics at the University of Washington, Seattle, WA, USA, and he volunteered as Subject Matter Expert with Energetics Research Group at Johns Hopkins University, Columbia, MD, USA.