2104 DAVIES AND DICK AR,OMATIC SULPHONYL FLUORIDES. CCLXXXV1.-Ayornatic 8ulphonyl Fluoyides. A Con-venient Method of Preparation. By WILLIAMDAVIESand JOHN HENRYDICK. THEonly method so far described of preparing aromatic sulphonyl fluorides is that of Steinkopf and his collaborators (J.pr. Chem. 1927 117 1 ; 1930 1