Résumé : Tribenzo [a,c,g,] fluorene, tetrabenzo [a,c,g,i] fluorene, 9‐(2‐naphtyl‐methyl)phenanthrene and 9‐(9‐phenanthrylmethyl) phenanthrene have been synthesized by Wagner‐Meerwein re‐arrangements in the fluorene series. Copyright © 1960 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim