﻿CONTENTS 
  

  

  Original 
  Papers 
  

  

  Page 
  

  

  Mineralogy. 
  — 
  Notes 
  on 
  white 
  chlqrites. 
  Earl 
  V. 
  Shannon 
  and 
  Edgar 
  T. 
  Wherry. 
  239 
  

  

  Mineralogy. 
  — 
  Crocidolite 
  from 
  eastern 
  Pennsylvania. 
  Edgar 
  T. 
  Wherry 
  and 
  Eari, 
  

  

  V. 
  Shannon 
  242 
  

  

  Paleontology. 
  — 
  Middle 
  Eocene 
  Foraminifera 
  of 
  the 
  genus 
  Dictyocomis 
  from 
  the 
  Repub- 
  

   lic 
  of 
  Haiti. 
  Wendell 
  P. 
  Woodring 
  244 
  

  

  Inorganic 
  Chemistry. 
  — 
  The 
  crystal 
  structures 
  of 
  the 
  alkali 
  halides. 
  Eugen 
  Posnjak 
  

  

  AND 
  Ralph 
  W. 
  G. 
  Wyckoff 
  248 
  

  

  PROCEEDINGS 
  

   Biological 
  Society 
  251 
  

  

  OFFICERS 
  OF 
  THE 
  ACADEMY 
  

   President: 
  W. 
  J. 
  Humphreys, 
  Weather 
  Bureau. 
  

   Corresponding 
  Secretary: 
  Francis 
  B. 
  Silsbee, 
  Bureau 
  of 
  Standards. 
  

   Recording 
  Secretary: 
  William 
  R. 
  Maxon, 
  National 
  Museum. 
  

   Treasurer: 
  R. 
  L. 
  Faris, 
  Coast 
  and 
  Geodetic 
  Survey. 
  

  

  