﻿Vlll 
  CONTENTS. 
  

  

  ■Number 
  54. 
  

  

  Art. 
  XXXVIII.— 
  Method 
  of 
  Studying 
  the 
  Diffusion 
  (Trans 
  

   piration) 
  of 
  Air 
  through 
  Water, 
  and 
  on 
  a 
  Method 
  of 
  

   Barometry 
  ; 
  by 
  C. 
  Barus 
  _ 
  397 
  

  

  XXXIX. 
  — 
  Separation 
  and 
  Determination 
  of 
  Mercury 
  as 
  Mer- 
  

  

  curous 
  Oxalate 
  ; 
  by 
  C. 
  A. 
  Peters 
  . 
  _ 
  _ 
  401 
  

  

  XL. 
  — 
  Electrical 
  Resistance 
  of 
  Thin 
  Films 
  Deposited 
  by 
  

  

  Cathode 
  Discharge 
  ; 
  by 
  A. 
  C. 
  Longden 
  407 
  

  

  XLI. 
  — 
  New 
  Meteorite 
  from 
  Oakley, 
  Logan 
  County, 
  Kansas 
  ; 
  

  

  by 
  H. 
  L. 
  Preston 
  410 
  

  

  XLII. 
  — 
  Observations 
  on 
  Certain 
  Well-Marked 
  Stages 
  in 
  the 
  

   Evolution 
  of 
  the 
  Testudinate 
  Humerus; 
  by 
  G. 
  R. 
  

   Wieland 
  _ 
  . 
  413 
  

  

  XLIII. 
  — 
  Chemical 
  Composition 
  of 
  Sulphohalite 
  ; 
  by 
  S. 
  L. 
  

  

  Penfield 
  ____ 
  425 
  

  

  XLIV. 
  — 
  Phases 
  of 
  the 
  Dakota 
  Cretaceous 
  iu 
  Nebraska 
  ; 
  by 
  

  

  C. 
  N. 
  Gould 
  _ 
  429 
  

  

  XLV. 
  — 
  Geothermal 
  Gradient 
  in 
  Michigan, 
  by 
  A. 
  C. 
  Lane 
  _ 
  434 
  

  

  XLVI. 
  — 
  Production 
  of 
  the 
  X-Rays 
  by 
  a 
  Battery 
  Current 
  ; 
  

  

  by 
  J. 
  Trowbridge 
  _ 
  439 
  

  

  SCIENTIFIC 
  INTELLIGENCE. 
  

  

  Chemistry 
  and 
  Physics 
  — 
  Krypton, 
  and 
  its 
  place 
  in 
  the 
  Periodic 
  Series, 
  A. 
  Laden- 
  

   burg 
  and 
  C. 
  Kruegel: 
  New 
  Sulphide 
  of 
  Arsenic, 
  A. 
  Scott, 
  442. 
  — 
  Relative 
  

   rates 
  of 
  Effusion 
  of 
  Argon, 
  Helium, 
  and 
  some 
  other 
  gases, 
  P. 
  G. 
  Donnan 
  : 
  

   Transmission 
  of 
  the 
  radiations 
  of 
  Radium 
  through 
  bodies, 
  H. 
  Becquerel, 
  443. 
  

   — 
  New 
  Radio-active 
  Substance, 
  Actinium, 
  A. 
  Debierne: 
  Influence 
  of 
  tempera- 
  

   ture 
  on 
  the 
  potential-fall 
  in 
  rarefied 
  gases, 
  G. 
  C. 
  Schmidt, 
  444. 
  — 
  Les 
  Sucres 
  et 
  

   leurs 
  principaux 
  Derives, 
  L. 
  Maquenne 
  : 
  Text-Book 
  of 
  Physical 
  Chemistry, 
  R. 
  

   A. 
  Lehfeldt 
  : 
  Lexikon 
  der 
  Kohlenstoff-Verbindungen, 
  M. 
  M. 
  Richter 
  : 
  Jenaer 
  

   Glas 
  und 
  seine 
  Yerwendung 
  in 
  Wissenschaft 
  und 
  Technik, 
  H. 
  Hovestadt, 
  445. 
  

  

  Geology— 
  Recent 
  publications 
  of 
  the 
  United 
  States 
  Geological 
  Survey, 
  C. 
  D. 
  

   "Walcott, 
  447. 
  — 
  Twentieth 
  Annual 
  Report 
  of 
  the 
  United 
  States 
  Geological 
  

   Survey, 
  1898-1899, 
  C. 
  L\ 
  Walcott, 
  448. 
  — 
  Crystal 
  Falls 
  Iron-Bearing 
  district 
  of 
  

   Michigan, 
  J. 
  M. 
  Clements 
  and 
  H. 
  L. 
  Smyth, 
  451. 
  — 
  Preliminary 
  Report 
  on 
  the 
  

   Cape 
  Nome 
  Gold 
  region 
  in 
  Alaska, 
  F. 
  C 
  Schrader 
  and 
  A. 
  H. 
  Brooks, 
  455. 
  — 
  

   Preliminary 
  Report 
  on 
  the 
  Klondike 
  Gold 
  Fields, 
  Yukon 
  District, 
  Canada, 
  R. 
  

   G. 
  McConnell: 
  Twenty-fourth 
  (and 
  final) 
  Annual 
  Report 
  of 
  the 
  Geological 
  

   and 
  Natural 
  History 
  Survey 
  of 
  Minnesota 
  for 
  the 
  years 
  1895-1898, 
  N. 
  H. 
  

   Winchell 
  : 
  George 
  Huntington 
  Williams 
  Memorial 
  Lectures 
  on 
  the 
  Principles 
  

   of 
  Geology, 
  456. 
  

  

  Miscellaneous 
  Scientific 
  Intelligence 
  — 
  American 
  Association 
  for 
  the 
  Advancement 
  

   of 
  Science 
  : 
  Report 
  on 
  the 
  Petrified 
  Forests 
  of 
  Arizona, 
  L. 
  F. 
  Ward, 
  461. 
  — 
  

   University 
  of 
  Tennessee 
  Record 
  : 
  Neues 
  Jahrbuch 
  fur 
  Mineralogie, 
  Geologie 
  

   und 
  Palasontologie 
  : 
  McGill 
  University: 
  K. 
  K. 
  Geologische 
  Reichsanstalt, 
  462. 
  

  

  Obituary— 
  The 
  Duke 
  of 
  Argyll 
  : 
  Professor 
  A. 
  Milne-Edwards: 
  Joseph 
  

   Bertrand, 
  462. 
  

  

  Index 
  to 
  Yoltjme 
  IX, 
  463. 
  

  

  