﻿Chemistry 
  and 
  Physics. 
  297 
  

  

  lishers 
  did 
  not 
  think 
  it 
  worth 
  while 
  to 
  take 
  a 
  little 
  more 
  pains 
  

   with 
  the 
  illustrations, 
  which 
  are 
  not 
  up 
  to 
  the 
  level 
  of 
  the 
  typo- 
  

   graphical 
  work. 
  Future 
  printings 
  will 
  give 
  the 
  author 
  an 
  oppor- 
  

   tunity 
  to 
  correct 
  an 
  occasional 
  slip, 
  as 
  for 
  example, 
  when 
  he 
  

   dates 
  the 
  first 
  recognition 
  of 
  the 
  phenomena 
  of 
  statical 
  elec- 
  

   tricity 
  from 
  " 
  about 
  the 
  commencement 
  of 
  the 
  Christian 
  era 
  " 
  

   instead 
  of 
  six 
  hundred 
  years 
  before, 
  One 
  cannot 
  but 
  surmise 
  

   that 
  he 
  may 
  have 
  been 
  misled 
  by 
  a 
  typographical 
  blunder 
  in 
  

   recent 
  editions 
  of 
  another 
  well-known 
  text-book. 
  

  

  II. 
  Geology 
  and 
  Mineralogy. 
  

  

  1. 
  Geology 
  of 
  the 
  Yellowstone 
  National 
  Park 
  ; 
  Descriptive 
  

   Geology, 
  Petrography 
  and 
  Paleontology 
  ; 
  by 
  Messrs. 
  Hague, 
  

   Iddings, 
  Weed, 
  Walcott, 
  Giety, 
  Stanton 
  and 
  Knowlton 
  

   (Monograph 
  xxxn, 
  Part 
  n, 
  U. 
  S. 
  Geol. 
  Surv., 
  4to, 
  pp. 
  791, 
  Plates 
  

   121). 
  Washington, 
  1899. 
  — 
  There 
  is 
  probably 
  no 
  area 
  of 
  equal 
  

   size 
  in 
  this 
  country 
  to 
  the 
  geology 
  of 
  which 
  so 
  much 
  popular 
  

   interest 
  attaches 
  as 
  the 
  Yellowstone 
  National 
  Park. 
  The 
  very 
  

   features 
  to 
  which 
  it 
  owes 
  its 
  existence 
  as 
  such, 
  are 
  those 
  dependent 
  

   upon 
  its 
  geological 
  formation, 
  and 
  as 
  year 
  by 
  year 
  it 
  is 
  seen 
  by 
  a 
  

   greater 
  number 
  of 
  visitors 
  and 
  becomes 
  better 
  known, 
  the 
  Park 
  

   serves 
  to 
  awaken 
  interest 
  not 
  only 
  in 
  its 
  own 
  geology 
  but 
  in 
  the 
  

   science 
  in 
  general. 
  

  

  The 
  appearance, 
  then, 
  of 
  this 
  great 
  monograph 
  containing 
  the 
  

   reports 
  of 
  the 
  various 
  well 
  known 
  specialists 
  who 
  have 
  assumed 
  

   different 
  departments 
  of 
  the 
  field 
  of 
  research, 
  opened 
  up 
  by 
  the 
  

   exhaustive 
  studies 
  and 
  collections 
  made 
  in 
  the 
  Park, 
  will 
  be 
  

   greeted 
  with 
  more 
  than 
  ordinary 
  attention. 
  We 
  regret 
  that 
  our 
  

   space 
  does 
  not 
  permit 
  us 
  to 
  give 
  the 
  extended 
  review 
  that 
  the 
  

   work 
  deserves, 
  but 
  that 
  we 
  must 
  content 
  ourselves 
  with 
  a 
  brief 
  

   notice 
  of 
  the 
  more 
  important 
  portions 
  of 
  its 
  contents. 
  

  

  The 
  volume 
  opens 
  with 
  a 
  descriptive 
  account 
  by 
  Iddings 
  and 
  

   Weed 
  of 
  the 
  Gallatin 
  Range 
  and 
  its 
  geology. 
  The 
  sedimentary 
  

   rocks 
  ranging 
  from 
  the 
  Cambrian 
  upward 
  to 
  the 
  Laramie 
  have 
  

   been 
  uplifted, 
  faulted, 
  and 
  intruded 
  by 
  igneous 
  magmas 
  in 
  large 
  

   laccolithic 
  bodies, 
  dikes 
  and 
  sheets. 
  Erosion 
  has 
  laid 
  bare 
  the 
  

   structures 
  and 
  later 
  glaciation 
  has 
  modified 
  the 
  topography. 
  The 
  

   petrography 
  of 
  the 
  igneous 
  rocks 
  is 
  then 
  described 
  by 
  Iddings, 
  

   who 
  shows 
  that 
  they 
  are 
  mostly 
  fine-grained, 
  porphyritic 
  rocks 
  

   of 
  andesitic 
  character. 
  An 
  occurrence 
  of 
  differentiation 
  in 
  an 
  

   intrusive 
  sheet 
  by 
  the 
  settling 
  of 
  augite 
  crystals 
  is 
  given. 
  The 
  

   third 
  chapter 
  is 
  a 
  description 
  by 
  Iddings 
  of 
  Electric 
  Peak 
  and 
  

   Sepulchre 
  Mountain 
  and 
  is 
  practically 
  a 
  reprint 
  of 
  a 
  former 
  article 
  

   noticed 
  in 
  this 
  Journal 
  (vol. 
  xliv, 
  p. 
  429, 
  1892). 
  They 
  are 
  

   regarded 
  as 
  parts 
  of 
  a 
  dissected 
  volcano. 
  

  

  The 
  northern 
  end 
  of 
  the 
  Teton 
  Range 
  projects 
  into 
  the 
  Park 
  

   and 
  its 
  geology 
  is 
  described 
  by 
  Weed 
  and 
  Iddings. 
  It 
  consists 
  

   of 
  a 
  nucleus 
  of 
  gneisses 
  and 
  schists 
  covered 
  with 
  Paleozoic 
  and 
  

   Mesozoic 
  strata 
  flexed 
  in 
  an 
  anticline 
  with 
  northward 
  dipping 
  

  

  