﻿Vol. 
  12 
  February 
  19, 
  1922 
  No. 
  4 
  

  

  JOURNAL 
  

  

  OP 
  THS 
  

  

  WASHINGTON 
  ACADEMY 
  

   OF 
  SCIENCES 
  

  

  BOARD 
  OF 
  EDITORS 
  

  

  S. 
  F. 
  Blake 
  Sidney 
  Paige 
  E. 
  D. 
  Williamson 
  

  

  BDRSAD 
  OP 
  PLANT 
  fNDUSTST 
  OSOLOOICAI, 
  SDRV8T 
  OBOPBT3ICAL 
  LABORATORY 
  

  

  ASSOCIATE 
  EDITORS 
  

  

  H. 
  V. 
  Hari^n 
  S. 
  a. 
  Rohwbr 
  

  

  BOTANICAL 
  SOCIBTV 
  ■MTOIfOLOOICAL 
  SOCISTt 
  

  

  N. 
  HOLUSTBR 
  G. 
  W. 
  Stoss 
  

  

  BIOLOGICAL 
  SOCIBTV 
  OlOLOOtCAL 
  lOCIBTV 
  

  

  W. 
  F. 
  Meggers 
  „ 
  J. 
  R. 
  Swanton 
  

  

  PHiLOSopmcAL 
  socisry 
  anthropolooical 
  aociSTr 
  

  

  PX7BUSHED 
  SEMI-MONTHLT 
  

   EXCEPT 
  IN 
  JULY, 
  AUGUST, 
  AND 
  SEPTEMBER, 
  WHEN 
  MONTHLY 
  

  

  BY 
  TBB 
  

  

  WASHINGTON 
  ACADEMY 
  OF 
  SCIENCES 
  

  

  OFPICS 
  OP 
  PUBUCATION 
  

  

  211 
  CHURCH 
  STREET 
  

  

  BASTON, 
  PA. 
  

  

  Sntered 
  m 
  Second 
  Oasa 
  Matter. 
  January 
  29, 
  I9I9, 
  at 
  tbe 
  poat-ofiBce 
  at 
  Baaton, 
  Pa., 
  tindar 
  th« 
  

  

  Act 
  of 
  Angutt 
  24, 
  1912. 
  Acceptance 
  for 
  mailing 
  at 
  special 
  rate 
  of 
  postage 
  provided 
  fa* 
  

  

  in 
  ScctioB 
  1103, 
  Act 
  of 
  October 
  3, 
  1917. 
  Aothoriaed 
  on 
  TnlT 
  3, 
  1918. 
  

  

  