﻿CONTENTS. 
  Vll 
  

  

  Number 
  293. 
  

  

  Page 
  

  

  James 
  Dwight 
  Dana. 
  [With 
  a 
  portrait] 
  (frontispiece) 
  __ 
  _ 
  329 
  

  

  Art. 
  XXVIII. 
  — 
  Color 
  Relations 
  of 
  Atoms, 
  Ions 
  and 
  Mole- 
  

   cules; 
  byM. 
  C. 
  Lea. 
  Parti. 
  (With 
  Plate 
  IV.) 
  357 
  

  

  XXIX. 
  — 
  Further 
  Notes 
  on 
  the 
  Gold 
  Ores 
  of 
  California 
  ; 
  by 
  

  

  H. 
  W. 
  Turner 
  __ 
  „._ 
  374 
  

  

  XXX. 
  — 
  Some 
  Relations 
  between 
  Temperature, 
  Pressure, 
  and 
  

  

  Latent 
  Heat 
  of 
  Vaporization; 
  by 
  C. 
  E. 
  Linebarger 
  ... 
  380 
  

  

  XXXI. 
  — 
  Double 
  Halides 
  of 
  Caesium, 
  Rubidium, 
  Sodium 
  and 
  

  

  Lithium 
  with 
  Thallium 
  ; 
  by 
  J. 
  H. 
  Pratt 
  397 
  

  

  XXXII. 
  — 
  Argon, 
  Prout's 
  Hypothesis, 
  and 
  the 
  Periodic 
  Law 
  ; 
  

  

  byE. 
  A. 
  Hill 
  . 
  _. 
  405 
  

  

  XXXIII. 
  — 
  Improved 
  Rock 
  Cutter 
  and 
  Trimmer 
  ; 
  by 
  E. 
  Kid- 
  

   well 
  _ 
  417 
  

  

  XXXIV. 
  — 
  Relation 
  of 
  the 
  plane 
  of 
  Jupiter's 
  orbit 
  to 
  the 
  

   mean-plane 
  of 
  four 
  hundred 
  and 
  one 
  minor 
  planet 
  orbits 
  ; 
  

   by 
  H. 
  A. 
  Newton 
  . 
  _ 
  420 
  

  

  SCIENTIFIC 
  INTELLIGENCE. 
  

  

  Chemistry 
  and 
  Physics 
  — 
  Presence 
  of 
  Argon 
  and 
  of 
  Helium 
  in 
  Uraninite, 
  Ram- 
  

   sat 
  and 
  Crookes, 
  421. 
  — 
  Combination 
  of 
  Argon 
  with 
  Benzene 
  vapor, 
  Berthelot, 
  

   422. 
  — 
  Presence 
  of 
  Argon 
  lines 
  in 
  the 
  Spectrum 
  of 
  Atmospheric 
  Air, 
  Newall, 
  

   424. 
  — 
  Spark 
  Spectrum 
  of 
  Argon 
  as 
  it 
  appears 
  in 
  the 
  Spark 
  Spectrum 
  of 
  Air, 
  

   Hartley, 
  425. 
  

  

  Geology 
  — 
  Reconnoissance 
  of 
  the 
  Bahamas 
  and 
  of 
  the 
  elevated 
  reefs 
  of 
  Cuba 
  in 
  

   the 
  'Steam 
  Yacht 
  "Wild 
  Duck," 
  1893, 
  A. 
  Agassiz, 
  425.— 
  Formation 
  of 
  Dolo- 
  

   mite, 
  C. 
  Klement, 
  426. 
  — 
  Dolomite 
  -making 
  and 
  dolomitic 
  calcareous 
  organisms, 
  

   A. 
  G-. 
  Hogbom, 
  427. 
  — 
  Bahama 
  Expedition 
  of 
  the 
  State 
  University 
  of 
  Iowa. 
  

   Narrative 
  and 
  Preliminary 
  Report, 
  C. 
  C. 
  Nutting, 
  428. 
  

  

  Miscellaneous 
  Scientific 
  Intelligence 
  — 
  National 
  Academy 
  of 
  Sciences, 
  428. 
  — 
  

   Penck's 
  Morphologie 
  der 
  Erdoberflache, 
  Penck, 
  429. 
  — 
  Orbit 
  of 
  Miss 
  Mitchell's 
  

   Comet, 
  1847, 
  VI, 
  H. 
  A. 
  Newton, 
  430. 
  

  

  Obituary 
  — 
  Dr. 
  Gideon 
  E. 
  Moore: 
  Prof. 
  James 
  E. 
  Oliver: 
  Francesco 
  San- 
  

   soni, 
  430. 
  

  

  