﻿656 
  Scientific 
  Intelligence. 
  

  

  The 
  whole 
  is 
  a 
  valuable 
  contribution 
  and 
  it 
  is 
  to 
  be 
  hoped 
  that 
  

   Professor 
  Warren 
  may 
  be 
  able 
  to 
  supplement 
  this 
  monograph 
  

   by 
  further 
  ones 
  dealing 
  with 
  other 
  parts 
  of 
  this 
  region. 
  

  

  l. 
  v. 
  p. 
  

  

  9. 
  Geology 
  and 
  Ore 
  Deposits 
  of 
  the 
  Philipsburg 
  Quadrangle, 
  

   Montana 
  ; 
  by 
  William 
  H. 
  Emmons 
  and 
  Frank 
  C. 
  Calkins. 
  Pp. 
  

   271 
  ; 
  17 
  pis., 
  55 
  figs. 
  U. 
  S. 
  G. 
  S., 
  Prof. 
  Paper, 
  No. 
  78, 
  1913.— 
  The 
  

   Philipsburg 
  Quadrangle 
  is 
  located 
  in 
  central 
  western 
  Montana, 
  only 
  

   a 
  few 
  miles 
  west 
  of 
  the 
  Butte 
  copper 
  district. 
  The 
  district 
  is 
  one 
  

   of 
  strong 
  relief 
  ranging 
  in 
  elevation 
  from 
  4,500 
  to 
  10,500 
  feet. 
  

   Within 
  the 
  quadrangle 
  lie 
  parts 
  of 
  three 
  mountain 
  masses. 
  The 
  

   sedimentary 
  rocks 
  of 
  the 
  area 
  range 
  in 
  age 
  from 
  Algonkian 
  to 
  

   Quaternary 
  and 
  consist 
  largely 
  of 
  limestones 
  and 
  shales, 
  with 
  

   smaller 
  amounts 
  of 
  sandstones 
  and 
  quartzites. 
  Intrusive 
  igneous 
  

   rocks 
  occur 
  in 
  large, 
  dome-like 
  masses, 
  and 
  to 
  a 
  less 
  extent 
  in 
  

   dikes 
  and 
  sheets. 
  The 
  batholitic 
  masses 
  are 
  probably 
  all 
  of 
  Ter- 
  

   tiary 
  age. 
  They 
  range 
  in 
  composition 
  from 
  diabase 
  to 
  a 
  siliceous 
  

   granitoid 
  rock, 
  the 
  more 
  common 
  types 
  being 
  quartz 
  diorite, 
  gra- 
  

   nodiorite, 
  and 
  granite. 
  The 
  ores 
  of 
  the 
  district 
  are 
  chiefly 
  impor- 
  

   tant 
  for 
  their 
  gold 
  and 
  silver 
  content, 
  although 
  at 
  times 
  copper 
  

   becomes 
  important. 
  The 
  deposits 
  are 
  of 
  three 
  types 
  and 
  include 
  

   fissure 
  veins 
  in 
  both 
  igneous 
  and 
  sedimentary 
  rocks, 
  contact- 
  

   metamorphic 
  replacement 
  deposits 
  in 
  limestone 
  near 
  the 
  granitic 
  

   intrusions, 
  and 
  replacement 
  deposits 
  in 
  the 
  sedimentary 
  rocks, 
  in 
  

   part 
  conforming 
  with 
  their 
  bedding 
  planes. 
  w. 
  k. 
  f. 
  

  

  10. 
  Gems 
  and 
  Precious 
  /Stones 
  in 
  1912 
  ; 
  by 
  Douglas 
  B. 
  Ster- 
  

   rett. 
  (Adv. 
  chapter, 
  Min. 
  Resources 
  of 
  the 
  United 
  States.) 
  — 
  

   Dr. 
  Sterrett's 
  annual 
  reports 
  always 
  contain 
  matter 
  of 
  interest 
  to 
  

   the 
  mineralogist. 
  In 
  the 
  present 
  one 
  he 
  notes 
  the 
  large 
  output 
  

   of 
  gem 
  sapphires 
  from 
  Montana, 
  from 
  the 
  mines 
  in 
  Fergus 
  County; 
  

   also 
  the 
  development 
  of 
  opal 
  deposits 
  in 
  Humboldt 
  County, 
  Nevada. 
  

   These 
  promise 
  to 
  produce 
  gems 
  equaj, 
  or 
  perhaps 
  superior, 
  to 
  those 
  

   of 
  Australia; 
  further, 
  the 
  finding 
  of 
  beautiful 
  amethysts 
  in 
  War- 
  

   ren 
  County, 
  N. 
  C. 
  The 
  diamond 
  localities 
  in 
  Arkansas 
  are 
  spoken 
  

   of 
  in 
  detail, 
  although 
  the 
  past 
  year 
  has 
  seen 
  no 
  remarkable 
  devel- 
  

   opments. 
  It 
  is 
  estimated 
  that 
  about 
  1400 
  diamonds, 
  weighing 
  

   nearly 
  550 
  carats, 
  were 
  found 
  from 
  August, 
  1906, 
  to 
  December, 
  

   1912. 
  These 
  were 
  valued 
  at 
  $12,100. 
  

  

  III. 
  Miscellaneous 
  Scientific 
  Intelligence. 
  

  

  1. 
  National 
  Antarctic 
  Expedition, 
  190 
  1-190 
  J+. 
  Meteorology, 
  

   Part 
  II. 
  Prepared 
  in 
  the 
  Meteorological 
  Office, 
  under 
  the 
  Super- 
  

   intendence 
  of 
  M. 
  W. 
  Campbell 
  Hepworth. 
  London, 
  1913 
  (Pub- 
  

   lished 
  by 
  the 
  Royal 
  Society). 
  — 
  Earlier 
  volumes 
  of 
  the 
  National 
  

   Antarctic 
  Expedition 
  have 
  been 
  from 
  time 
  to 
  time 
  noticed 
  in 
  the 
  

   pages 
  of 
  this 
  Journal. 
  Parti 
  on 
  Meteorology 
  appeared 
  in 
  1908 
  (see 
  

   vol. 
  xxvi, 
  p. 
  588). 
  The 
  present 
  volume, 
  Part 
  II, 
  contains 
  a 
  remark- 
  

   able 
  series 
  of 
  daily 
  synchronous 
  charts 
  extending 
  from 
  October 
  1, 
  

  

  