﻿CONTENTS. 
  

  

  Page 
  

   Art. 
  XL. 
  — 
  Upper 
  Devonian 
  Delta 
  of 
  the 
  Appalachian 
  Geo- 
  

  

  syncline 
  ; 
  by 
  J. 
  Barrell 
  429 
  

  

  XLL— 
  Optical 
  Bench 
  for 
  Elementary 
  Work; 
  by 
  H. 
  W. 
  

  

  Farwell 
  _ 
  473 
  

  

  XLII. 
  — 
  Volcanic 
  Research 
  at 
  Kilauea 
  in 
  the 
  Summer 
  of 
  

  

  1911 
  ; 
  byF. 
  A. 
  Perret 
  ; 
  with 
  Report 
  by 
  A. 
  Brun 
  475 
  

  

  XLIII. 
  — 
  Observations 
  on 
  the 
  Stem 
  Structure 
  of 
  Psaronius 
  

  

  Brasiliensis 
  ; 
  by 
  O. 
  A. 
  Derby 
  _ 
  _ 
  _ 
  489 
  

  

  XLIV. 
  — 
  Fauna 
  of 
  the 
  Florissant 
  (Colorado) 
  Shales 
  ; 
  by 
  T. 
  

  

  D. 
  A. 
  COCKERKLL 
  _ 
  498 
  

  

  XLV.— 
  The 
  Photoelectric 
  Effect 
  ; 
  by 
  L. 
  Page 
  501 
  

  

  XLVI. 
  — 
  Graphical 
  Methods 
  in 
  Microscopical 
  Petrography 
  ; 
  

  

  by 
  F. 
  E. 
  Wright. 
  (With 
  Plates 
  II 
  to 
  IX) 
  509 
  

  

  XLVIT. 
  — 
  A 
  Graphical 
  Plot 
  for 
  Use 
  in 
  the 
  Microscopical 
  

  

  Determination 
  of 
  the 
  Plagioclase 
  Feldspars 
  ; 
  by 
  F. 
  E. 
  

  

  Wright. 
  ( 
  With 
  Plate 
  X) 
  540 
  

  

  XL 
  VIII. 
  — 
  On 
  the 
  Influence 
  of 
  Alcohol 
  and 
  of 
  Cane 
  Sugar 
  

  

  upon 
  the 
  Rate 
  of 
  Solution 
  of 
  Cadmium 
  in 
  Dissolved 
  

  

  Iodine 
  ; 
  by 
  R. 
  G. 
  Van 
  Name 
  and 
  D. 
  U. 
  Hill 
  543 
  

  

  XLIX. 
  — 
  Comparative 
  Studies 
  of 
  Magnetic 
  Phenomena. 
  IV. 
  

  

  Twist 
  in 
  Steel 
  and 
  Nickel 
  Rods 
  due 
  to 
  a 
  Longitudinal 
  

  

  Magnetic 
  Field 
  ; 
  by 
  S. 
  R. 
  Williams 
  555 
  

  

  SCIENTIFIC 
  INTELLIGENCE. 
  

  

  Chemistry 
  and 
  Physics— 
  Hydrides 
  of 
  Boron, 
  A. 
  Stock 
  : 
  Metallic 
  Beryllium, 
  

   Fichter 
  and 
  Jablczynski, 
  562. 
  — 
  General 
  Chemistry, 
  Theoretical 
  and 
  

   Applied, 
  J. 
  C. 
  Blake 
  : 
  A 
  Dictionary 
  of 
  Applied 
  Chemistry 
  : 
  General 
  and 
  

   Industrial 
  Organic 
  Chemistry, 
  563. 
  — 
  Chemistry 
  and 
  its 
  Eelations 
  to 
  Daily 
  

   Life 
  : 
  Studies 
  in 
  Valency 
  : 
  Deviation 
  of 
  Eubidium 
  Eays 
  in 
  Magnetic 
  

   Fields, 
  K. 
  Bergwitz, 
  564. 
  — 
  Researches 
  in 
  Magneto-Optics, 
  P. 
  Zeeman 
  : 
  

   A 
  New 
  Element, 
  Uranium 
  X: 
  Mechanics 
  and 
  Heat, 
  565. 
  — 
  Practical 
  

   Physics 
  for 
  Secondary 
  Schools 
  : 
  Beyond 
  the 
  Atom, 
  566.— 
  Physikalisohe 
  

   Chemie 
  der 
  homogen 
  und 
  helerogenen 
  Gasreaktionen, 
  567. 
  

  

  Geology 
  — 
  Virginia 
  Geological 
  Survey 
  : 
  Sixteenth 
  Annual 
  Report 
  of 
  the 
  

   Geological 
  Commission, 
  Cape 
  of 
  Good 
  Hope, 
  Department 
  of 
  Mines, 
  1911 
  

   (1912), 
  568.— 
  Sixth 
  Annual 
  Report 
  (New 
  Series) 
  of 
  the 
  New 
  Zealand 
  Geo- 
  

   logical 
  Survey, 
  Session 
  II, 
  1912 
  : 
  Geological 
  Survey 
  of 
  Western 
  Australia, 
  

   1912,^ 
  569. 
  — 
  Recurrent 
  Tropidoleptus 
  zones 
  of 
  the 
  Upper 
  Devonian 
  in 
  New 
  

   York 
  : 
  Grundziige 
  der 
  geologischen 
  Formations- 
  und 
  Gebirgskunde 
  : 
  

   Igneous 
  Rocks, 
  J. 
  P. 
  Iddings, 
  571. 
  — 
  Introduction 
  to 
  the 
  Study 
  of 
  Igneous 
  

   Rocks, 
  G. 
  I. 
  Finlay, 
  573.— 
  Der 
  Vulcanismus, 
  574. 
  

  

  Miscellaneous 
  Scientific 
  Intelligence 
  — 
  Publications 
  of 
  the 
  Carnegie 
  Institu- 
  

   tion 
  of 
  Washington, 
  575. 
  — 
  The 
  Mining 
  World 
  Index 
  of 
  Current 
  Literature, 
  

   576. 
  

  

  Obituary— 
  C. 
  G. 
  Rockwood 
  : 
  J. 
  R. 
  Eastman 
  : 
  A. 
  MacFarlane 
  : 
  J. 
  Milne: 
  

   W. 
  N. 
  Hartley 
  : 
  H. 
  Marshall 
  : 
  P. 
  L. 
  Sclater 
  : 
  H. 
  Credner 
  : 
  H. 
  Las- 
  

   peyres 
  : 
  H. 
  Weber. 
  

  

  