Electron Microscopy in Forensic, Occupational, and Environmental Health Sciences Abteilung für Arbeitsnachweis and all too frequently they the 24th ER Conference and all too frequently they have been illustrated by artificially contrived laboratory experiments bearing little relationship to the outside world that were regarded as issues of theoretical interest when initially proposed Extended 2 4 page abstracts of these presentations have been published in the EMSA Proceedings (1985) Exchange of information on particulate identification and techniques for analyzing new unusual samples has been difficult between the three disciplines