Biographic Memoirs: Volume 73 contains the biographies of deceased members of the National Academy of Sciences and bibliographies of their published works. Each biographical essay was written by a member of the Academy familiar with the professional career of the deceased. For historical and bibliographical purposes, these volumes are worth returning to time and again. Table of ContentsFRONT MATTERCHARLES GREELEY ABBOTCARL DAVID ANDERSONWILLIAM OSGOOD AYDELOTTEFRANK AMBROSE BEACHWALKER BLEAKNEYJAMES FREDERICK BONNERRODNEY LEE COOLLOUIS BARKHOUSE FLEXNERREYNOLD CLAYTON FUSONCHARLES ROY HENDERSONJOHANNES HOLTFRETERCARL IVER HOVLANDCARSON DUNNING JEFFRIESFREDERICK GEORGE KEYESHEINRICH KLUVERLEWIS GIBSON LONGSWORTHALFRED EZRA MIRSKYMELVIN SPENCER NEWMANALFRED HENRY STURTEVANTWILLIAM GOULD YOUNG