I thank several people for the instruction on the use of the SEM: Dr. Jerrold Abraham, Dr. Andrew Hunt, and Mark Abraham, and the Department of Pathology at SUNY Upstate Medical University for allowing me to personally use the SEM. Also, I thank Dr. David Johnson of SUNY ESF for helpful discussion and advice. Mark Abraham kindly allowed me to analyze his archived aerosol filter samples. Mr. Richard Adler of Jamesville-DeWitt High School allowed me to pursue this research independently.