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  Scientific 
  Intelligence. 
  

  

  excellent 
  opportunity 
  for 
  the 
  scientific 
  study 
  of 
  ore-deposits 
  from 
  

   both 
  a 
  practical 
  and 
  theoretical 
  standpoint. 
  So 
  rapid 
  has 
  been 
  

   the 
  advance 
  along 
  this 
  line, 
  especially 
  in 
  the 
  United 
  States, 
  that 
  

   hitherto 
  the 
  student 
  has 
  found 
  the 
  text-books 
  on 
  the 
  subject 
  

   rapidly 
  becoming 
  antiquated, 
  and 
  unless 
  possessed 
  of 
  consider- 
  

   able 
  time 
  and 
  facilities 
  for 
  extensive 
  reading 
  of 
  the 
  literature, 
  has 
  

   been 
  compelled 
  to 
  labor 
  at 
  a 
  disadvantage. 
  

  

  Professor 
  Kemp 
  has 
  succeeded 
  admirably 
  in 
  filling 
  this 
  defi- 
  

   ciency 
  in 
  the 
  literature 
  of 
  this 
  subject, 
  in 
  the 
  volume 
  before 
  us» 
  

   In 
  this 
  he 
  has 
  to 
  a 
  large 
  extent 
  rewritten 
  the 
  former 
  edition 
  of 
  his 
  

   book 
  on 
  ore-deposits, 
  and 
  made 
  very 
  considerable 
  additions 
  of 
  

   new 
  material. 
  It 
  is 
  a 
  work 
  the 
  value 
  of 
  which 
  will 
  be 
  appreci- 
  

   ated 
  by 
  all 
  who 
  have 
  occasion 
  to 
  use 
  it, 
  containing, 
  as 
  it 
  does, 
  a 
  

   concise 
  yet 
  comprehensive 
  and 
  thoroughly 
  up-to-date 
  description 
  

   and 
  consideration 
  of 
  the 
  ore-deposits 
  of 
  the 
  United 
  States 
  and 
  

   Canada. 
  

  

  Part 
  I 
  is 
  introductory 
  in 
  its 
  nature, 
  its 
  chapters 
  being 
  devoted 
  

   to 
  such 
  brief 
  considerations 
  of 
  geology 
  — 
  of 
  the 
  formation 
  of 
  

   cavities 
  for 
  the 
  reception 
  of 
  ores; 
  of 
  the 
  minerals 
  forming 
  ores; 
  

   of 
  the 
  facts 
  and 
  theories 
  concerning 
  the 
  methods 
  of 
  their 
  

   deposition 
  ; 
  of 
  the 
  structure 
  of 
  veins 
  and 
  the 
  classification 
  of 
  ore- 
  

   deposits— 
  as 
  are 
  necessary 
  for 
  an 
  intelligent 
  reading 
  of 
  the 
  

   descriptions 
  of 
  Part 
  II. 
  The 
  author 
  has, 
  and 
  we 
  think 
  wisely, 
  

   included 
  here 
  only 
  a 
  single 
  broad 
  scheme 
  of 
  classification 
  based 
  

   largely 
  on 
  origin, 
  and 
  in 
  accordance 
  with 
  the 
  results 
  of 
  the 
  most 
  

   recent 
  investigation. 
  The 
  presentation 
  and 
  discussion 
  of 
  the 
  

   numerous 
  other 
  classifications, 
  which 
  if 
  included 
  in 
  the 
  text 
  

   might 
  lead 
  to 
  confusion, 
  are 
  referred 
  to 
  the 
  Appendix. 
  

  

  Part 
  II 
  deals 
  directly 
  with 
  the 
  principal 
  ore-deposits 
  them- 
  

   selves, 
  classed 
  under 
  the 
  heads 
  of 
  the 
  appropriate 
  metals. 
  In 
  

   presenting 
  the 
  theories 
  relating 
  to 
  the 
  genesis 
  of 
  the 
  ores, 
  

   excellent 
  judgment 
  has 
  been 
  shown 
  in 
  giving 
  only 
  such 
  as 
  have 
  

   a 
  substantial 
  basis 
  in 
  observed 
  facts 
  and 
  in 
  omitting 
  all 
  those 
  

   more 
  or 
  less 
  fanciful 
  theories 
  which 
  so 
  often 
  burden 
  the 
  literature 
  

   on 
  this 
  subject. 
  The 
  descriptions 
  in 
  the 
  text 
  are 
  supplemented 
  

   by 
  excellent 
  half-tone 
  engravings, 
  maps 
  and 
  diagrams 
  taken 
  

   from 
  various 
  sources. 
  Especial 
  mention 
  might 
  be 
  made 
  of 
  those 
  

   illustrating 
  the 
  occurrence 
  of 
  the 
  Lake 
  Superior 
  iron 
  ores, 
  the 
  

   mineral 
  lodes 
  of 
  Butte 
  City, 
  Mont., 
  and 
  those 
  of 
  Alaska. 
  

  

  The 
  full 
  lists 
  of 
  references 
  to 
  the 
  literature 
  on 
  ore-deposits, 
  

   distributed 
  throughout 
  the 
  book, 
  will 
  certainly 
  be 
  of 
  great 
  value 
  

   to 
  anyone 
  desiring 
  a 
  more 
  thorough 
  and 
  extended 
  knowledge 
  of 
  

   this 
  subject. 
  c. 
  h. 
  w. 
  

  

  7. 
  The 
  Ward- 
  Goonley 
  Collection 
  of 
  Meteorites. 
  Pp. 
  1 
  00, 
  plates 
  

   vi. 
  Chicago, 
  1900. 
  — 
  The 
  collection 
  of 
  meteorites 
  described 
  in 
  

   this 
  catalogue 
  has 
  been 
  brought 
  together 
  by 
  Professor 
  H. 
  A. 
  

   Ward 
  and 
  includes 
  some 
  424 
  independent 
  occurrences. 
  It 
  thus 
  

   ranks 
  as 
  one 
  of 
  the 
  very 
  large 
  collections 
  of 
  the 
  world. 
  It 
  is 
  

   also 
  remarkable 
  in 
  the 
  total 
  weight 
  as 
  too 
  in 
  the 
  size 
  of 
  the 
  

   individual 
  specimens. 
  The 
  aggregate 
  weight 
  amounts 
  to 
  1400 
  

  

  