﻿ANNOUNCEMENTS 
  OF 
  MEETINGS 
  OF 
  THE 
  ACADEMY 
  AND 
  

  

  AFFILIATED 
  SOCIETIES 
  

  

  Thursday, 
  AprU 
  20. 
  The 
  Academy, 
  at 
  the 
  Cosmos 
  Club, 
  at 
  8 
  p.m. 
  

  

  Saturday, 
  April 
  22. 
  The 
  Philosophical 
  vSociety. 
  

  

  Wednesday, 
  April 
  26. 
  The 
  Geological 
  Society. 
  

  

  vSaturday, 
  April 
  29. 
  The 
  Biological 
  Society, 
  at 
  the 
  Cosmos 
  Club, 
  at 
  8 
  p.m. 
  

  

  Program 
  : 
  

  

  W. 
  E. 
  RitTBr: 
  The 
  usefulness 
  and 
  the 
  peril- 
  of 
  laboratory 
  methods 
  in 
  

   biology. 
  

  

  Tuesday, 
  May 
  2. 
  The 
  Botanical 
  Society. 
  

   Thursday, 
  May 
  4. 
  The 
  Entomological 
  vSociety. 
  

  

  PROGRAMS 
  ANNOUNCED 
  SINCE 
  THE 
  PRECEDING 
  ISSUE 
  OF 
  THE 
  JOURNAL* 
  

  

  Wednesday, 
  March 
  29. 
  Joint 
  meeting 
  of 
  the 
  Academy, 
  the 
  Philosophical 
  Society, 
  and 
  the 
  

   Chemical 
  Society, 
  at 
  the 
  Cosmos 
  Club, 
  at 
  8 
  p.m. 
  Program: 
  F. 
  W. 
  Aston: 
  Isotypes 
  

   and 
  the 
  structure 
  of 
  the 
  atom. 
  

  

  Saturday, 
  April 
  1. 
  The 
  Biological 
  Society, 
  at 
  the 
  Cosmos 
  Club, 
  at 
  8 
  p.m. 
  Program: 
  

   P. 
  Iv. 
  Ricker: 
  Wild 
  flowers 
  that 
  need 
  protection. 
  J. 
  W. 
  Gidley: 
  Hunting 
  fossil 
  verte- 
  

   brates 
  in 
  southeastern 
  Arizona. 
  

  

  Thursday, 
  April 
  6. 
  The 
  Entomological 
  Society, 
  at 
  the 
  National 
  Museum, 
  at 
  8 
  p.m. 
  

   Program 
  : 
  Notes 
  and 
  exhibition 
  oj 
  specimens. 
  

  

  ' 
  Received 
  too 
  late 
  for 
  publication 
  before 
  the 
  date 
  of 
  the 
  meetiii,';. 
  

  

  