﻿CONTENTS. 
  Vll 
  

  

  Number 
  293. 
  

  

  Page 
  

  

  Art. 
  XXIII. 
  — 
  The 
  Mathematics 
  of 
  Isostasy. 
  I; 
  by 
  T. 
  C. 
  

  

  Chamberlin. 
  II 
  ; 
  by 
  W. 
  D. 
  MacMillan 
  311 
  

  

  Art. 
  XXIV. 
  — 
  Notes 
  on 
  the 
  Manzano 
  Group, 
  Mexico; 
  by 
  

  

  Willis 
  T. 
  Lee 
  323 
  

  

  Art. 
  XXV. 
  — 
  The 
  Piedmont 
  Terraces 
  of 
  the 
  Northern 
  Appala- 
  

   chians; 
  by 
  Joseph 
  Barrell 
  (continued) 
  327 
  

  

  Art. 
  XXVI. 
  — 
  Relative 
  Densities 
  of 
  Igneous 
  Rocks 
  Calculated 
  

  

  from 
  their 
  Norms; 
  by 
  J. 
  P. 
  Iddings 
  363 
  

  

  Art. 
  XXVII. 
  — 
  -Apthitalite 
  (Glaserite) 
  from 
  Searles 
  Lake, 
  

  

  California; 
  by 
  W. 
  F. 
  Foshao 
  367 
  

  

  Art. 
  XXVIII. 
  — 
  Local 
  Unconformity 
  between 
  the 
  Berkshire 
  

   Schist 
  and 
  the 
  Stockbridge 
  Limestone 
  in 
  Adams, 
  Mass. 
  ; 
  

   by 
  T. 
  N. 
  Dale 
  369 
  

  

  Art. 
  XXIX. 
  — 
  Fossil 
  Botany 
  in 
  the 
  Western 
  World: 
  An 
  

  

  Appreciation 
  ; 
  by 
  H. 
  B. 
  Guppt 
  372 
  

  

  SCIENTIFIC 
  INTELLIGENCE. 
  

  

  Chemistry 
  and 
  Physics 
  — 
  Analytical 
  Weighing, 
  Horace 
  L. 
  Wells, 
  375. 
  — 
  Use 
  

   of 
  Cupferron 
  in 
  Quantitative 
  Analysis, 
  G. 
  E. 
  F. 
  Lundell 
  and 
  H. 
  B. 
  

   Knowles 
  : 
  A 
  Course 
  of 
  Practical 
  Chemistry 
  for 
  Agricultural 
  Students, 
  

   H. 
  A. 
  D. 
  Neville 
  and 
  L. 
  F.JSTewman, 
  376. 
  — 
  Magnetic 
  Susceptibilities 
  of 
  

   Certain 
  Gases, 
  K. 
  Honda, 
  J. 
  Okubo 
  and 
  Take 
  Sone, 
  377. 
  — 
  A 
  New 
  Cad- 
  

   mium 
  Vapor 
  Arc 
  Lamp, 
  F. 
  Bates, 
  378. 
  — 
  Inertia 
  of 
  a 
  Sphere 
  Moving 
  in 
  a 
  

   Liquid, 
  G. 
  Cook, 
  379. 
  — 
  Osservazioni 
  e 
  Bicerche 
  Sperimentali 
  sulle 
  Scin- 
  

   tille 
  Continue, 
  L. 
  Amaduzzi, 
  380. 
  — 
  Ions, 
  Electrons, 
  and 
  Ionizing 
  Badia- 
  

   tions, 
  J. 
  Crowther, 
  381. 
  

  

  Geology 
  and 
  Natural 
  History 
  — 
  The 
  Tetracentron-Drimsy 
  Question, 
  G. 
  B. 
  

   Wieland, 
  etc., 
  382. 
  — 
  Illinois 
  Geological 
  Survey. 
  F. 
  W. 
  De 
  Wolf 
  : 
  Minne- 
  

   sota 
  Geological 
  Survey, 
  W. 
  H. 
  Emmons, 
  383. 
  — 
  Geological 
  Survey 
  of 
  South 
  

   Australia, 
  R. 
  L. 
  Jack: 
  Vertebrate 
  Zoology, 
  H, 
  H. 
  Newman: 
  Mendelism, 
  

   R. 
  C. 
  Bunnett, 
  384. 
  — 
  Inbreeding 
  and 
  Outbreeding 
  ; 
  their 
  Genetic 
  and 
  

   Sociological 
  Significance, 
  E. 
  M. 
  East 
  and 
  D. 
  F. 
  Jones, 
  385. 
  

  

  Miscellaneous 
  Scientific 
  Intelligence 
  — 
  The 
  Carnegie 
  Foundation 
  for 
  the 
  Advance- 
  

   ment 
  of 
  Teaching 
  ; 
  Fourteenth 
  Annual 
  Beport 
  of 
  the 
  President, 
  H. 
  S. 
  

   Pritchett, 
  and 
  Treasurer, 
  B. 
  A. 
  Franks, 
  386.— 
  Meeting 
  of 
  the 
  National 
  

   Academy 
  of 
  Sciences 
  : 
  Carnegie 
  Institution 
  of 
  Washington, 
  387. 
  — 
  Water 
  

   Power 
  Development 
  in 
  Canada 
  :* 
  Publications 
  of 
  the 
  British 
  Museum 
  of 
  

   Natural 
  Historv. 
  — 
  Annual 
  Beport 
  of 
  Bureau 
  of 
  Scientific 
  Advice 
  for 
  

   India 
  for 
  1917-18, 
  388. 
  

  

  Obituary 
  — 
  A. 
  J. 
  Moses 
  : 
  C. 
  Lapworth, 
  389. 
  — 
  J. 
  A. 
  Brashear 
  : 
  T. 
  B. 
  A. 
  

   Stuart, 
  390. 
  

  

  