﻿250 
  Scientific 
  Intelligence. 
  

  

  printed 
  pages 
  were 
  edited, 
  and 
  twelve 
  geologic 
  folios 
  were 
  pub- 
  

   lished. 
  

  

  The 
  library 
  of 
  the 
  survey, 
  which 
  is 
  becoming 
  remarkably 
  com- 
  

   plete, 
  has 
  reached 
  the 
  total 
  number, 
  of 
  books, 
  pamphlets 
  and 
  maps, 
  

   of 
  127,285. 
  The 
  appropriation 
  for 
  the 
  fiscal 
  year 
  1895-96 
  was 
  

   $521,890. 
  h. 
  s. 
  w. 
  

  

  4. 
  Geology 
  of 
  the 
  Castle 
  Mountain 
  Mining 
  district, 
  Montana 
  / 
  

   by 
  W. 
  II. 
  Weed 
  and 
  L. 
  V. 
  Pirsson. 
  Bull. 
  No. 
  139, 
  U. 
  S. 
  G. 
  S., 
  

   pp. 
  1-164, 
  pi. 
  i-xvii, 
  figs. 
  1-11, 
  1896. 
  — 
  This 
  memoir 
  is 
  a 
  general 
  

   description 
  of 
  the 
  geological 
  features 
  mapped 
  on 
  the 
  Little 
  Belt 
  

   Mountains 
  sheet, 
  based 
  upon 
  field 
  work 
  done 
  by 
  the 
  authors 
  dur- 
  

   ing 
  the 
  years 
  1892 
  and 
  1893, 
  containing 
  detailed 
  account 
  of 
  the 
  

   sections 
  of 
  the 
  Algonkian, 
  Cambrian, 
  Carboniferous, 
  Cretaceous 
  

   and 
  Miocene 
  beds 
  with 
  reference 
  to 
  Silurian, 
  Devonian 
  and 
  Jura- 
  

   trias 
  outcrops, 
  together 
  with 
  lists 
  of 
  fossils 
  when 
  obtained. 
  The 
  

   igneous 
  rocks 
  are 
  described 
  with 
  fuller 
  details, 
  both 
  petrographic 
  

   and 
  chemical, 
  and 
  chapter 
  ix 
  is 
  devoted 
  to 
  study 
  of 
  the 
  glacial 
  

   phenomena 
  of 
  the 
  region. 
  Chapters 
  x 
  and 
  xi 
  give 
  a 
  summary 
  of 
  

   the 
  economic 
  and 
  mineral 
  products 
  of 
  the 
  region. 
  h. 
  s. 
  w. 
  

  

  5. 
  The 
  Eocene 
  deposits 
  of 
  the 
  Middle 
  Atlantic 
  Slope 
  in 
  Dela- 
  

   ivare, 
  Maryland^ 
  and 
  Virginia 
  ; 
  by 
  W. 
  B. 
  Clark. 
  Bull. 
  No. 
  

   141, 
  IT. 
  S. 
  Geol. 
  Surv., 
  pp. 
  1-167, 
  pi. 
  i-xl, 
  1896.— 
  In 
  this 
  Bulletin 
  

   is 
  brought 
  together 
  a 
  thorough 
  account 
  of 
  the 
  Eocene 
  deposits 
  of 
  

   this 
  region 
  and 
  their 
  faunas 
  based 
  upon 
  original 
  investigations. 
  

   Many 
  new 
  species 
  are 
  given, 
  which 
  with 
  the 
  known 
  species 
  are 
  

   fully 
  illustrated. 
  The 
  conclusions 
  reached 
  are 
  given 
  in 
  a 
  paper 
  

   in 
  this 
  Journal.* 
  An 
  excellent 
  brief 
  synopsis 
  of 
  the 
  criteria 
  

   employed 
  in 
  the 
  correlation 
  of 
  sedimentary 
  rocks 
  is 
  given 
  on 
  

   pages 
  47 
  to 
  58. 
  h. 
  s. 
  w. 
  

  

  6. 
  Catalogue 
  des 
  Bibliographies 
  Geologiques 
  redige 
  avec 
  le 
  

   concours 
  des 
  membres 
  de 
  la 
  Commission 
  bibliographique 
  du 
  Con- 
  

   gres 
  par 
  Emm. 
  de 
  Margerie. 
  Congres 
  Geologique 
  International 
  

   5me 
  Session, 
  Washington, 
  1891, 
  6me 
  Session 
  Zurich, 
  1894, 
  733 
  pp., 
  

   Paris, 
  1896 
  (Gauthier 
  Villars 
  et 
  Fils). 
  — 
  This 
  exhaustive 
  bibliog- 
  

   raphy 
  of 
  bibliographies 
  of 
  geological 
  works, 
  containing 
  3918 
  

   entries, 
  is 
  the 
  first 
  published 
  result 
  of 
  the 
  international 
  commit- 
  

   tee 
  on 
  geological 
  bibliography 
  organized 
  at 
  the 
  Washington 
  

   meeting 
  of 
  the 
  Congres 
  geologique 
  international 
  in 
  1891. 
  

  

  The 
  commission 
  was 
  entrusted 
  with 
  the 
  threefold 
  task 
  of 
  1st, 
  

   preparing 
  a 
  list 
  of 
  existing 
  bibliographies 
  of 
  geology, 
  whether 
  

   separate 
  works, 
  lists 
  in 
  connection 
  with 
  special 
  treatises 
  or 
  reports, 
  

   or 
  private 
  lists 
  or 
  card 
  catalogues, 
  so 
  far 
  as 
  known, 
  in 
  all 
  countries 
  

   and 
  languages 
  ; 
  2d, 
  provoking 
  societies 
  and 
  geological 
  surveys, 
  

   operating 
  in 
  countries 
  in 
  which 
  such 
  lists 
  have 
  not 
  been 
  prepared, 
  

   to 
  prepare 
  detailed 
  catalogues 
  of 
  the 
  works 
  relating 
  to 
  the 
  geol- 
  

   ogy 
  of 
  their 
  respective 
  territories; 
  and 
  3d, 
  preparing 
  for 
  the 
  

   periodic 
  (annual 
  if 
  practicable) 
  publication 
  of 
  the 
  current 
  bibliog- 
  

   raphy, 
  to 
  be 
  published 
  immediately 
  after 
  the 
  close 
  of 
  the 
  period 
  

   covered. 
  The 
  first 
  of 
  these 
  tasks 
  is 
  accomplished 
  in 
  the 
  present 
  

  

  * 
  This 
  Journal, 
  1Y, 
  vol. 
  i, 
  pp. 
  365-374. 
  

  

  

  