﻿CONTENTS. 
  

  

  Number 
  255. 
  

  

  Page 
  

  

  Art. 
  XVII. 
  — 
  A 
  Method 
  for 
  the 
  Determination 
  of 
  Dissocia- 
  

   tion 
  Pressures 
  of 
  Sulphides, 
  and 
  its 
  Application 
  to 
  

   Covellite 
  (CuS) 
  and 
  Pyrite 
  (FeS 
  3 
  ); 
  by 
  E. 
  T. 
  Allen 
  and 
  

   R.H.Lombard 
  175 
  

  

  XVIII. 
  — 
  Beecher's 
  Classification 
  of 
  Trilobites, 
  after 
  Twenty 
  

  

  Years; 
  by 
  P. 
  E. 
  Raymond 
  __ 
  196 
  

  

  XIX. 
  — 
  Origin 
  of 
  Formkoble; 
  by 
  J. 
  J. 
  Stevenson 
  __. 
  211 
  

  

  XX.— 
  On 
  the 
  Etching 
  Figures 
  of 
  Beryl; 
  by 
  A. 
  P. 
  Honess.. 
  223 
  

  

  XXL— 
  Plotting 
  Crystal 
  Zones 
  on 
  the 
  Sphere; 
  by 
  J. 
  M. 
  Blake 
  237 
  

  

  XXII. 
  — 
  Note 
  on 
  the 
  Age 
  of 
  the 
  Scranton 
  Coal, 
  Denver 
  

  

  Basin, 
  Colorado; 
  by 
  G. 
  B. 
  Richardson 
  . 
  _ 
  243 
  

  

  SCIENTIFIC 
  INTELLIGENCE. 
  

  

  Chemistry 
  and 
  Physics 
  — 
  Eeminiscences, 
  C. 
  F. 
  Chandler, 
  245. 
  — 
  Kemoval 
  of 
  

   Barium 
  from 
  Brines 
  used 
  in 
  the 
  Manufacture 
  of 
  Salt, 
  W. 
  W. 
  Skinner 
  and 
  

   W. 
  F. 
  Baughman 
  : 
  Ammonium 
  Chloride 
  as 
  a 
  Food 
  for 
  Yeast, 
  C. 
  H. 
  

   Hoffman, 
  246. 
  — 
  General 
  Chemistry, 
  H. 
  P. 
  Cadt: 
  Generalized 
  Relativity 
  

   and 
  Gravitation 
  Theory, 
  247. 
  — 
  Ball 
  Lightning, 
  M. 
  E. 
  Mathias, 
  248.— 
  

   Laboratory 
  Course 
  of 
  Practical 
  Electricity, 
  M. 
  J. 
  Archbold 
  : 
  National 
  

   Physical 
  Laboratory, 
  Report 
  for 
  the 
  Year 
  1915-16, 
  W. 
  F. 
  Parrott, 
  249. 
  

  

  Geology 
  — 
  Investigations 
  of 
  Gravity 
  and 
  Isostasy, 
  W. 
  Bowie, 
  249. 
  — 
  Prodro- 
  

   mus 
  of 
  Nicolaus 
  Steno's 
  Dissertation 
  Concerning 
  a 
  Solid 
  Body 
  Enclosed 
  by 
  

   Process 
  of 
  Nature 
  Within 
  a 
  Solid, 
  J. 
  G. 
  Winter, 
  250. 
  — 
  Atlantic 
  Slope 
  

   Areas, 
  P. 
  G. 
  Sheldon: 
  Iowa 
  Geological 
  Survey, 
  Annual 
  Report, 
  1914, 
  with 
  

   accompanying 
  papers, 
  G. 
  F. 
  Kay: 
  New 
  York 
  State 
  Museum, 
  Twelfth 
  

   Report 
  of 
  the 
  Director, 
  J. 
  M. 
  Clarke, 
  251. 
  — 
  Review 
  of 
  the 
  Geology 
  of 
  

   Texas, 
  J. 
  A. 
  Udden, 
  C. 
  L. 
  Baker, 
  and 
  E. 
  Bose, 
  252 
  : 
  Annual 
  Progress 
  

   Report 
  of 
  the 
  Geological 
  Survey 
  of 
  Western 
  Australia 
  for 
  the 
  Year 
  1915, 
  

   A. 
  G. 
  Maitland: 
  Economic 
  Geology, 
  H. 
  Ries, 
  252. 
  

  

  Miscellaneous 
  Scientific 
  Intelligence 
  — 
  Annual 
  Report 
  of 
  the 
  Superintendent. 
  

   United 
  States 
  Coast 
  and 
  Geodetic 
  Survey, 
  E. 
  L. 
  Jones, 
  to 
  the 
  Secretary 
  of 
  

   Commerce, 
  W. 
  C. 
  Redfield, 
  for 
  the 
  fiscal 
  year 
  ending 
  June 
  30, 
  1916. 
  

   253. 
  — 
  Fundamentals 
  of 
  Psychology, 
  W. 
  B. 
  Pillsbury 
  : 
  Mechanisms 
  of 
  

   Character 
  Formation: 
  an 
  Introduction 
  to 
  Psychoanalysis, 
  W. 
  A. 
  White, 
  

   254. 
  

  

  