﻿CONTENTS. 
  

  

  Number 
  279. 
  

  

  Page 
  

   Aet. 
  XII. 
  — 
  Ripples 
  and 
  Related 
  Sedimentary 
  Surface 
  

   Forms 
  and 
  their 
  Paleogeographic 
  Interpretations; 
  by 
  

   W. 
  H. 
  Bucher 
  149 
  

  

  Art. 
  XIII. 
  — 
  The 
  Age 
  of 
  the 
  Brandon 
  Lignite 
  and 
  Flora; 
  

  

  by 
  E. 
  W. 
  Berry 
  211 
  

  

  Art. 
  XIV. 
  — 
  An 
  Amphibian 
  from 
  the 
  Eocene; 
  by 
  F. 
  B. 
  

  

  Loomis 
  217 
  

  

  Samuel 
  Wendell 
  Williston 
  220 
  

  

  SCIENTIFIC 
  INTELLIGENCE. 
  

  

  Chemistry 
  and 
  Physics 
  — 
  Properties 
  of 
  Lead 
  Isotopes, 
  T. 
  W. 
  Richards, 
  224. 
  

   — 
  A 
  New 
  Source 
  of 
  Glycerin 
  e 
  : 
  Occurrence, 
  Chemistry, 
  Metallurgy, 
  and 
  

   Uses 
  of 
  Tungsten. 
  J. 
  .). 
  Runner 
  and 
  ML. 
  Hartmann 
  : 
  An 
  Advanced 
  

   Course 
  in 
  Quantitative 
  Analysis, 
  H. 
  Fay, 
  225. 
  — 
  Reduction 
  Methods 
  in 
  

   Volumetric 
  Analysis, 
  E. 
  Knecht 
  and 
  Eva 
  Hibbert 
  : 
  A 
  Handbook 
  of 
  

   Colloid 
  Chemistry 
  (W. 
  Oswald), 
  M. 
  H. 
  Fisher 
  : 
  The 
  Genesis 
  of 
  the 
  Law 
  

   of 
  Error, 
  R. 
  A. 
  Sampson, 
  226. 
  — 
  Atomic 
  Number 
  and 
  Spectral 
  Series, 
  

   H. 
  Bell, 
  227. 
  — 
  Mirrors, 
  Prisms 
  and 
  Lenses, 
  J. 
  P. 
  C. 
  Southall, 
  228. 
  — 
  

   Physics 
  for 
  Technical 
  Students 
  ; 
  Sound, 
  Light, 
  Electricity 
  and 
  Magnet- 
  

   ism, 
  W. 
  B. 
  Anderson, 
  229. 
  — 
  Hindu 
  Achievements 
  in 
  Exact 
  Science, 
  

  

  B. 
  K. 
  Sarkar 
  : 
  The 
  Life 
  and 
  Discoveries 
  of 
  Michael 
  Faraday, 
  J. 
  A. 
  

   Crowther, 
  230. 
  

  

  Geology 
  — 
  Appendages 
  of 
  Trilobites, 
  C. 
  D. 
  Walcott, 
  231. 
  — 
  Mississippian 
  

   formations 
  of 
  western 
  Kentucky, 
  C. 
  Butts 
  and 
  E. 
  0. 
  Ulrich, 
  232. 
  — 
  

   Comanchean 
  and 
  Cretaceous 
  Pectinidae 
  of 
  Texas, 
  H. 
  T. 
  Kniker 
  : 
  Deca- 
  

   pod 
  Crustaceans 
  from 
  the 
  Panama 
  region, 
  Mary 
  J. 
  Rathbun 
  : 
  The 
  

   Radiolarian 
  Cherts 
  of 
  the 
  Franciscan 
  group, 
  E. 
  F. 
  Davis, 
  234. 
  — 
  La 
  Face 
  

   de 
  la 
  Terre 
  (Ed. 
  Suess), 
  E. 
  de 
  Margarie, 
  etc., 
  235. 
  — 
  New 
  graphic 
  

   method 
  for 
  determining 
  the 
  depth 
  and 
  thickness 
  of 
  strata 
  and 
  the 
  pro- 
  

   jection 
  of 
  dip, 
  H. 
  S. 
  Palmer 
  : 
  Osteology 
  of 
  the 
  Armored 
  Dinosanria 
  

   in 
  the 
  U. 
  S. 
  National 
  Museum, 
  C. 
  W. 
  Gilmore, 
  237. 
  — 
  A 
  large 
  Dia- 
  

   mond 
  from 
  South 
  Africa 
  : 
  The 
  Production 
  of 
  Precious 
  Stones 
  in 
  1917, 
  

   G. 
  F. 
  Kunz, 
  238. 
  

  

  Miscellaneous 
  Scientific 
  Intelligence. 
  — 
  Civic 
  Biology: 
  A 
  Text-book 
  of 
  Prob- 
  

   lems, 
  Local 
  and 
  National, 
  that 
  can 
  be 
  solved 
  only 
  by 
  Civic 
  Cooperation, 
  

  

  C. 
  F. 
  Hodge 
  and 
  J. 
  Dawson 
  : 
  The 
  Rodents 
  of 
  Iowa, 
  D. 
  Stoner 
  : 
  Plant 
  

   Genetics, 
  J. 
  M. 
  Coulter 
  and 
  M. 
  C. 
  Coulter 
  : 
  Cellulose, 
  C. 
  F. 
  Cross 
  

   and 
  E. 
  J. 
  Be 
  van, 
  239. 
  — 
  Board 
  of 
  Scientific 
  Advice 
  for 
  India 
  ; 
  Annual 
  

   Report 
  for 
  the 
  Year 
  1916-1917, 
  240. 
  

  

  Obituary— 
  E. 
  C. 
  Pickering 
  : 
  W. 
  M. 
  Watts 
  : 
  M. 
  Deprez 
  : 
  H. 
  E. 
  J. 
  G. 
  

   DuBois, 
  240. 
  

  

  