﻿IV 
  CONTENTS. 
  

  

  Number 
  44. 
  

  

  Page 
  

   Art. 
  VIII. 
  — 
  Rotatory 
  Polarization 
  of 
  Light 
  in 
  Media 
  Sub- 
  

   jected 
  to 
  Torsion 
  ; 
  by 
  A. 
  W. 
  EwELL 
  89 
  

  

  IX. 
  — 
  Lichenaria 
  typa 
  W. 
  & 
  S.; 
  by 
  F. 
  W. 
  Sardeson 
  101 
  

  

  X. 
  — 
  Studies 
  in 
  the 
  Cyperacese, 
  XI 
  ; 
  by 
  T. 
  Holm 
  105 
  

  

  XI. 
  — 
  Constitution 
  of 
  Tourmaline; 
  by 
  F. 
  W. 
  Clarke 
  Ill 
  

  

  XII. 
  — 
  Determination 
  of 
  Tellurous 
  Acid 
  in 
  presence 
  of 
  

  

  Haloid 
  Salts; 
  by 
  F. 
  A. 
  Gooch 
  and 
  C. 
  A. 
  Peters 
  122 
  

  

  XIII. 
  — 
  lodometric 
  Method 
  for 
  the 
  Estimation 
  of 
  Boric 
  Acid 
  ; 
  

  

  by 
  L. 
  C. 
  Jones.. 
  ._ 
  _. 
  _.. 
  127 
  

  

  XIV. 
  — 
  Method 
  for 
  the 
  Detection 
  and 
  Separation 
  of 
  Dextro- 
  

   and 
  Laevo-rotating 
  Crystals, 
  with 
  Some 
  Observations 
  

   upon 
  the 
  Gr'owth 
  and 
  Properties 
  of 
  Crystals 
  of 
  Sodium 
  

   Chlorate; 
  by 
  D. 
  A. 
  Kreider 
  _ 
  _.. 
  133 
  

  

  XV 
  — 
  Devonian 
  Interval 
  in 
  northern 
  Arkansas 
  ; 
  by 
  H. 
  S. 
  

  

  Williams 
  139 
  

  

  XVI. 
  — 
  Note 
  on 
  a 
  New 
  Meteoric 
  Iron 
  found 
  near 
  the 
  Tom- 
  

   bigbee 
  River, 
  in 
  Choctaw 
  and 
  Sumter 
  Counties, 
  Ala- 
  

   bama, 
  U. 
  S. 
  A.; 
  by 
  W. 
  M. 
  Foote. 
  (With 
  Plates 
  II 
  

   and 
  III.) 
  153 
  

  

  XVII. 
  — 
  Orthoclase 
  Crystals 
  from 
  Shinano, 
  . 
  Japan 
  ; 
  by 
  C. 
  

  

  IWASAKI 
  _ 
  _ 
  157 
  

  

  SCIENTIFIC 
  INTELLIGENCE. 
  

  

  Chemistry 
  and 
  Physics— 
  Two 
  new 
  Radio-active 
  Elements, 
  Polonium 
  and 
  Radium, 
  

   S. 
  and 
  P. 
  Curie, 
  159. 
  — 
  Liquid 
  Hydrogen, 
  Dewar: 
  Ozomolybdates, 
  Muthmann 
  

   and 
  Nagel, 
  160. 
  — 
  Action 
  of 
  Charcoal 
  iu 
  the 
  Purification 
  of 
  Spirit, 
  Glasenapp: 
  

   Constitution 
  of 
  the 
  Simplest 
  Proteids, 
  Kossel, 
  161.— 
  H^emochromogen, 
  Von 
  

   Zeyner: 
  Geschichte 
  der 
  Physikalischen 
  Experiraentierkunst, 
  E. 
  Gerland 
  and 
  

   F. 
  Traumuller, 
  162. 
  

  

  Geology 
  and 
  Mineralogy 
  — 
  Terminology 
  of 
  Vertebral 
  Centra, 
  G. 
  R. 
  Wieland, 
  163. 
  

   — 
  Cycadean 
  Moncecism, 
  G. 
  R. 
  Wieland: 
  Sur 
  Stereosiernum 
  tumidum, 
  Cope. 
  

   H. 
  B. 
  Geinitz, 
  164. 
  

  

  