﻿Vol. 
  12 
  February 
  4, 
  1922 
  No. 
  3 
  

  

  JOURNAL 
  

  

  OP 
  THB 
  

  

  WASHINGTON 
  ACADEMY 
  

   OF 
  SCIENCES 
  

  

  BOARD 
  OF 
  EDITORS 
  

   S. 
  F. 
  Blab:s 
  Sidnby 
  Paigb 
  E. 
  D. 
  Williamson 
  

  

  BDBSAU 
  Oy 
  PlrANT 
  INDUSTXT 
  OSOLOQICAI, 
  SOSVST 
  OSOPaTSICAI. 
  I,AB08AT0RT 
  

  

  ASSOCIATE 
  EDITORS 
  

  

  H. 
  V. 
  Harlan 
  S. 
  A. 
  Rohwbs 
  

  

  BOTAHICAI, 
  SOCIBTT 
  ■MTOlfOLOOICAl 
  BOCnT* 
  

  

  N. 
  HOLUSTBR 
  G. 
  W. 
  STOSB 
  

  

  BIOLOOICAI, 
  SOCIBTT 
  OBOLOOICAL 
  BOCISTT 
  

  

  W. 
  F. 
  Mbggbrs 
  J. 
  R. 
  Swanton 
  

  

  PBtLOSOPHICAL 
  BOCtSTT 
  AHTBBOPOLOOICAl. 
  ■OCISTT 
  

  

  PUBUSHBD 
  SBMI-MONTHLT 
  

   8XCBPT 
  IN 
  JULY, 
  AUGUST. 
  AND 
  SBPTBMBBR, 
  WHBN 
  UONTHLT 
  

  

  BY 
  THB 
  

  

  WASHINGTON 
  ACADEMY 
  OF 
  SCIENCES 
  

  

  OPnCB 
  OV 
  PUBUCATION 
  

  

  311 
  CHURCH 
  8TRBBT 
  

  

  8ASTON. 
  PA 
  

  

  Batarcd 
  m 
  Second 
  ClaM 
  Matter, 
  Janaary 
  25, 
  1919, 
  at 
  the 
  poat-offlce 
  at 
  Baatea, 
  Pa., 
  andar 
  tht 
  

  

  Act 
  of 
  Augutt 
  24, 
  1912. 
  Acceptance 
  for 
  mailing 
  at 
  special 
  rate 
  of 
  poatage 
  provided 
  for 
  

  

  in 
  Section 
  1103, 
  Act 
  of 
  October 
  3. 
  1917. 
  Aathoriaad 
  on 
  Talr 
  i, 
  1918. 
  

  

  