﻿Vol. 
  12 
  June 
  19, 
  1922 
  No. 
  12 
  

  

  JOURNAL 
  

  

  OF 
  THE 
  

  

  WASHINGTON 
  ACADEMY 
  

  

  » 
  

  

  OF 
  SCIENCES 
  

  

  BOARD 
  OF 
  EDITORS 
  

  

  S. 
  P. 
  Bl,AKS 
  SiDNKT 
  PaIGS 
  E. 
  D. 
  WuXIAXaON 
  

  

  BnBKAD 
  Oy 
  PLAMT 
  UrDOMKT 
  OBOLOOICAI. 
  aDKVST 
  OSOPHTaiCAI, 
  I.ABOKATOXT 
  

  

  ASSOCIATE 
  EDITORS 
  

  

  H. 
  V. 
  Harlam 
  S. 
  a. 
  Rohwbs 
  

  

  BOTAmCAL 
  SOaSTT 
  SNTOUOLOOICAI, 
  SOCISTT 
  

  

  N. 
  HoixisTss 
  G. 
  W. 
  Stosb 
  

  

  BIOLOOICAL 
  lOCIITT 
  QSOLOGICAL 
  SOCI8TY 
  

  

  W. 
  p. 
  MSG0BR3 
  J. 
  R. 
  Swantom 
  

  

  PBtLOBOPBICAL 
  SOCISTT 
  ANTHROPOLOQICAI^ 
  SOCIBTY 
  

  

  PUBUSHBD 
  SSm-UONTHLT 
  

   BXCBPT 
  IN 
  JULY, 
  AUGUST, 
  AND 
  SSPTBUBSR, 
  WHBN 
  HOMTBLT 
  

  

  BY 
  THl 
  

  

  WASHINGTON 
  ACADEMY 
  OP 
  SCIENCES 
  

  

  0p9icb 
  op 
  pubucatiom 
  

  

  211 
  Church 
  strbbt 
  

  

  baston, 
  pa. 
  

  

  Entered 
  m 
  5>econd 
  Class 
  Matter, 
  January 
  25, 
  1919, 
  at 
  the 
  post-oflBce 
  at 
  Baston, 
  Pa., 
  under 
  the 
  

   Act 
  of 
  August 
  24, 
  1912. 
  Acceptance 
  for 
  mailing 
  at 
  special 
  rate 
  of 
  postage 
  provided 
  for 
  

   in 
  Section 
  1103, 
  Act 
  of 
  October 
  3, 
  1917. 
  Authorized 
  on 
  July 
  3, 
  1918. 
  

  

  