﻿CONTENTS. 
  

  

  Page 
  

  

  Art. 
  L. 
  — 
  Some 
  Lavas 
  of 
  Monte 
  Arci, 
  Sardinia 
  ; 
  by 
  H. 
  S. 
  

  

  Washington 
  __ 
  577 
  

  

  LI. 
  — 
  On 
  the 
  Use 
  of 
  Sealing 
  Wax 
  as 
  a 
  Source 
  of 
  Lime 
  for 
  the 
  

  

  Wehnelt 
  Cathode 
  ; 
  by 
  Nellie 
  N. 
  Hornor 
  591 
  

  

  LII. 
  — 
  Dehydration 
  and 
  Recovery 
  of 
  Silica 
  in 
  Analysis 
  ; 
  by 
  

  

  F. 
  A. 
  Gooch, 
  F. 
  C. 
  Reckert 
  and 
  S. 
  B. 
  Kuzirian 
  598 
  

  

  LIII. 
  — 
  The 
  Ascent 
  of 
  Lava 
  ; 
  by 
  F. 
  A. 
  Perret 
  605 
  

  

  LIY.— 
  Solar 
  Radiation 
  ; 
  by 
  F. 
  W. 
  Yert 
  . 
  _ 
  _ 
  609 
  

  

  LY. 
  — 
  A 
  New 
  Occurrence 
  of 
  Cuprodescloizite 
  ; 
  by 
  R. 
  C. 
  

  

  Wells 
  _ 
  _ 
  _ 
  _ 
  636 
  

  

  LYI. 
  — 
  On 
  the 
  Crystallization 
  of 
  Willemite 
  ; 
  by 
  C. 
  Palache 
  

  

  and 
  R. 
  P. 
  D. 
  Graham 
  __ 
  639 
  

  

  SCIENTIFIC 
  INTELLIGENCE. 
  

  

  Chemistry 
  and 
  Physics 
  — 
  Action 
  of 
  Sulphur 
  Trioxide 
  upon 
  Salts, 
  W. 
  Traube, 
  

   644. 
  — 
  Volumetric 
  Determination 
  of 
  Fluorine, 
  A. 
  Greef 
  : 
  Behavior 
  of 
  

   Hydrogen 
  towards 
  Palladium, 
  Gutbier, 
  Gebhardt, 
  and 
  Ottenstein 
  : 
  

   A 
  New 
  Era 
  in 
  Chemistry, 
  H. 
  C. 
  Jones, 
  645. 
  — 
  Experiments 
  Arranged 
  for 
  

   Students 
  in 
  General 
  Chemistry, 
  E. 
  F. 
  Smith 
  and 
  H. 
  F. 
  Keller 
  : 
  Chemical 
  

   German, 
  F. 
  C. 
  Phillips: 
  Spectrum 
  of 
  the 
  Aurora 
  Borealis, 
  L. 
  Vegard 
  

   646. 
  — 
  To 
  Produce 
  a 
  Continuous 
  Spectrum 
  in 
  the 
  Ultra-violet, 
  V. 
  Henri 
  

   The 
  Gyroscope, 
  F. 
  J. 
  B. 
  Cordeiro, 
  647. 
  — 
  Medizinische 
  Physik, 
  O. 
  Fischer 
  

   Wonders 
  of 
  Wireless 
  Telegraphy, 
  J. 
  A. 
  Fleming, 
  648.— 
  Principles 
  and 
  

   Methods 
  of 
  Geometrical 
  Optics, 
  Second 
  Edition, 
  J. 
  P. 
  C. 
  Southall 
  : 
  

   Physical 
  Measurements, 
  A. 
  W. 
  Duff 
  and 
  A. 
  W. 
  Ewell 
  : 
  Uber 
  kausale 
  

   und 
  konditionale 
  Weltanschauung 
  und 
  deren 
  Stellung 
  zur 
  Entwicklungs- 
  

   mechanik, 
  W. 
  Roux, 
  649. 
  — 
  Annals 
  of 
  the 
  Astrophysical 
  Observatory 
  of 
  

   the 
  Smithsonian 
  Institution, 
  650. 
  

  

  Geology 
  and 
  Mineralogy 
  — 
  Research 
  in 
  China, 
  650. 
  — 
  Fosseis 
  Devonianos 
  do 
  

   Parana^ 
  652. 
  — 
  Monograph 
  of 
  the 
  Terrestrial 
  Palaeozoic 
  Arachnids 
  of 
  

   North 
  America, 
  653.— 
  The 
  Heart 
  of 
  Gaspe 
  ; 
  Sketches 
  in 
  the 
  Gulf 
  of 
  St. 
  

   Lawrence: 
  Ninth 
  Report 
  of 
  the 
  Director 
  of 
  the 
  Science 
  Division, 
  654. 
  — 
  

   New 
  Trilobites 
  from 
  the 
  Maquoketa 
  Beds 
  of 
  Fayette 
  County, 
  Iowa 
  : 
  New 
  

   Paleontologic 
  Periodical 
  — 
  Palaeontologische 
  Zeitschrift 
  : 
  Petrology 
  of 
  the 
  

   alkali-granites 
  and 
  porphyries 
  of 
  Quincy 
  and 
  the 
  Blue 
  Hills, 
  Mass., 
  655. 
  — 
  

   Geology 
  and 
  Ore 
  Deposits 
  of 
  the 
  Philipsburg 
  Quadrangle, 
  Montana 
  : 
  Gems 
  

   and 
  Precious 
  Stones 
  in 
  1912, 
  656. 
  

  

  Miscellaneous 
  Scientific 
  Intelligence— 
  National 
  Antarctic 
  Expedition, 
  1901- 
  

   1904 
  ; 
  Meteorology, 
  Part 
  II, 
  656. 
  — 
  Annual 
  Report 
  of 
  the 
  Board 
  of 
  Regents 
  

   of 
  the 
  Smithsonian 
  Institution, 
  showing 
  the 
  operations, 
  expenditures, 
  and 
  

   condition 
  of 
  the 
  Institution 
  for 
  the 
  year 
  ending 
  June 
  30, 
  1912 
  : 
  Report 
  on 
  

   the 
  Progress 
  and 
  Condition 
  of 
  the 
  U. 
  S. 
  National 
  Museum 
  for 
  the 
  year 
  end- 
  

   ing 
  June 
  30, 
  1912, 
  657. 
  — 
  Publications 
  of 
  the 
  British 
  Museum 
  of 
  Natural 
  

   History 
  : 
  Publications 
  of 
  the 
  Museum 
  of 
  the 
  Brooklyn 
  Institute 
  of 
  Arts 
  

   and 
  Sciences 
  : 
  National 
  Academy 
  of 
  Sciences, 
  658. 
  — 
  Elements 
  of 
  Bacterio- 
  

   logical 
  Technique, 
  659. 
  

  

  Obituary 
  — 
  A. 
  R. 
  Wallace 
  : 
  W. 
  H. 
  Preece, 
  659. 
  

  

  