Discussion to Dr. Brown's Speech

　It's very much of a privilege to be able to discussupon such an outstanding presentation as that of Prof. Brown.

　As you well know, mercurial compounds besidesalkyl compounds rarely induce CNS-disorder sothat they represent little or no problem. Recently, many organic mercurials have been produced commercially and consumed by many farmers. Moreover, some potent fungicides applying medical treatmentshave been reevaluated because of their insidioustoxities.