﻿CONTENTS. 
  

  

  Page 
  

   Art. 
  X. 
  — 
  The 
  Water 
  Content 
  of 
  Coal, 
  with 
  Some 
  Ideas 
  on 
  

   the 
  Genesis 
  and 
  Nature 
  of 
  Coal; 
  by 
  E. 
  Mack 
  and 
  G. 
  A. 
  

   Hulett 
  89 
  

  

  XI. 
  — 
  An 
  Apparatus 
  for 
  Determining 
  Freezing 
  Point 
  Lower- 
  

   ing; 
  by 
  R. 
  G. 
  Van 
  Name 
  and 
  W. 
  G. 
  Brown 
  110 
  

  

  XII. 
  — 
  The 
  Sodium-Potassium 
  Nephelites; 
  by 
  N. 
  L. 
  Bowen 
  115 
  

  

  XIII. 
  — 
  Pottsville 
  Formations 
  and 
  Faunas 
  of 
  Arkansas 
  and 
  

  

  Oklahoma; 
  by 
  K. 
  F. 
  Mather 
  133 
  

  

  XIV. 
  — 
  A 
  Study 
  of 
  Two 
  So-called 
  Halloysites 
  from 
  Georgia 
  

  

  and 
  Alabama; 
  by 
  P. 
  A. 
  yander 
  Meulen 
  140 
  

  

  XV. 
  — 
  Methods 
  in 
  Reversed 
  and 
  Non-reversed 
  Spectrum 
  

  

  Interferometry 
  (continued); 
  by 
  C. 
  Barus 
  145 
  

  

  XVI. 
  — 
  On 
  the 
  Identity 
  of 
  Hamlinite 
  with 
  Goyazite; 
  by 
  W. 
  

  

  T. 
  SCHALLER 
  163 
  

  

  SCIENTIFIC 
  INTELLIGENCE. 
  

  

  Chemistry 
  and 
  Physics.— 
  Occurrence 
  of 
  Free 
  Monoxide 
  in 
  the 
  "Floaters" 
  

   Kelp, 
  S. 
  C. 
  Langdon, 
  165. 
  — 
  Atomic 
  Weight 
  of 
  Lead 
  of 
  Radioactive 
  Origin, 
  

   T. 
  W. 
  Richards 
  and 
  C. 
  Wadsworte, 
  3d 
  : 
  Engineering 
  Chemistry, 
  T. 
  B. 
  

   Stillman, 
  166. 
  — 
  Qualitative 
  Analysis, 
  E. 
  H. 
  S. 
  Bailey 
  and 
  H. 
  P. 
  Cady 
  : 
  

   X-Ray 
  Wave-Lengths, 
  M. 
  Siegbahn, 
  167. 
  — 
  General 
  Physics, 
  W. 
  S. 
  

   Franklin 
  and 
  B. 
  MacNutt, 
  168. 
  — 
  Cosmical 
  Evolution, 
  Critical 
  and 
  

   Constructive, 
  Second 
  Edition, 
  E. 
  McLennan, 
  169. 
  — 
  An 
  Introduction 
  to 
  

   Astronomy, 
  New 
  and 
  Revised 
  Edition, 
  F. 
  R. 
  Moulton, 
  170. 
  

  

  Geology 
  and 
  Mineralogy. 
  — 
  Some 
  Geophysical 
  Observations 
  at 
  Burrinjuck, 
  

   L. 
  A. 
  Cotton, 
  170. 
  — 
  Geology 
  of 
  Cincinnati 
  and 
  Vicinity, 
  N. 
  M. 
  Fen- 
  

   neman 
  : 
  Field 
  Geology, 
  F. 
  H. 
  Lahee, 
  172. 
  — 
  The 
  Fundamental 
  Prin- 
  

   ciples 
  of 
  Petrology, 
  (E. 
  Weinschenk), 
  A. 
  Johannsen 
  : 
  L'Oural 
  du 
  

   Nord 
  ; 
  Le 
  Bassin 
  des 
  Rivieres 
  Wagran 
  et 
  Kakvva, 
  L. 
  Duparc 
  et 
  M. 
  

   Tikano 
  witch 
  : 
  Etude 
  Comparee 
  des 
  Gites 
  Platiniferes 
  de 
  la 
  Sierra 
  de 
  

   Ronda 
  et 
  de 
  l'Oural, 
  L. 
  Duparc 
  and 
  A. 
  Grosset, 
  173. 
  — 
  Etude 
  Cristallo- 
  

   graphique 
  et 
  Optique 
  d'un 
  certain 
  nombre 
  de 
  Mineraux 
  des 
  Pegmatites 
  de 
  

   Madagascar 
  et 
  de 
  Mineraux 
  de 
  l'Oural, 
  R.-C. 
  Sabot 
  : 
  The 
  Geological 
  His- 
  

   tory 
  of 
  Australian 
  Flowering 
  Plants, 
  Errata, 
  E. 
  C. 
  Andrews, 
  174. 
  

  

  Obituary. 
  — 
  W. 
  Ellis 
  : 
  C. 
  Reid 
  : 
  D. 
  Oliver 
  : 
  A. 
  M. 
  Worthington 
  : 
  J. 
  

   Wrightson, 
  174. 
  

  

  