﻿Geology. 
  235 
  

  

  were 
  deposited 
  in 
  shallow 
  water 
  or 
  in 
  water 
  of 
  moderate 
  

   depth. 
  . 
  . 
  They 
  are 
  not 
  pure 
  radiolarian 
  oozes, 
  nor 
  are 
  they 
  

   siliceous 
  oozes 
  composed 
  in 
  part 
  of 
  radiolaria, 
  and 
  in 
  part 
  of 
  the 
  

   remains 
  of 
  other 
  siliceous 
  organisms. 
  A 
  portion 
  of 
  their 
  silica 
  

   is 
  chemically 
  precipitated 
  and 
  the 
  radiolaria 
  are 
  simply 
  inciden- 
  

   tal 
  fossils, 
  entombed 
  in 
  the 
  precipitated 
  silica. 
  

  

  "It 
  appears 
  that 
  the 
  silica 
  contributed 
  to 
  the 
  ocean 
  by 
  the 
  

   rivers 
  may 
  be 
  precipitated 
  entirely 
  through 
  the 
  intervention 
  of 
  

   organisms. 
  If 
  it 
  is 
  chemically 
  precipitated, 
  it 
  probably 
  comes 
  

   down 
  in 
  the 
  form 
  of 
  magnesium 
  silicate 
  and 
  not 
  as 
  silicic 
  

   acid. 
  . 
  . 
  In 
  the 
  absence 
  of 
  another 
  hypothesis, 
  one 
  is 
  forced 
  to 
  

   the 
  assumption 
  of 
  colloidal 
  segregation 
  of 
  silica 
  from 
  intermixed 
  

   shaly 
  material" 
  (pp. 
  353-354). 
  c. 
  s. 
  

  

  6. 
  La 
  Face 
  de 
  la 
  Terre; 
  par 
  Ed. 
  Suess, 
  translated 
  from 
  Das 
  

   Antlitz 
  der 
  Erde 
  with 
  the 
  authorization 
  of 
  the 
  author 
  and 
  

   annotated 
  under 
  the 
  direction 
  of 
  Emmanuel 
  de 
  Margerie,, 
  Tome 
  

   III, 
  4 
  e 
  Partie 
  (Fin), 
  with 
  an 
  epilogue 
  by 
  Pierre 
  Termier, 
  Pp. 
  

   xv, 
  1361-1724. 
  2 
  colored 
  maps, 
  3 
  plates, 
  and 
  114 
  figures, 
  of 
  

   which 
  90 
  have 
  been 
  drawn 
  especially 
  for 
  the 
  French 
  edition. 
  

   Paris, 
  1918 
  (Librairie 
  Armand 
  Colin). 
  

  

  Also 
  a 
  supplementary 
  volume, 
  — 
  Tables 
  generales 
  de 
  I'ouvrage, 
  

   Tomes 
  I, 
  II, 
  III 
  translated 
  and 
  annotated 
  under 
  the 
  direction 
  of 
  

   Emmanuel 
  de 
  Margerie. 
  Pp. 
  258 
  (Librairie 
  Armand 
  Colin). 
  — 
  

   This 
  third 
  volume, 
  part 
  4 
  of 
  the 
  French 
  edition 
  of 
  Suess' 
  great 
  

   work, 
  Das 
  Antlitz 
  der 
  Erde, 
  includes 
  chapters 
  xxiii-xxvii. 
  It 
  

   corresponds 
  to 
  the 
  last 
  quarter 
  of 
  the 
  fourth 
  volume 
  of 
  the 
  

   English 
  translation 
  published 
  in 
  1909, 
  being 
  part 
  5, 
  chapters 
  xiv- 
  

   xxiii 
  of 
  the 
  English 
  edition. 
  It 
  is, 
  however, 
  brought 
  up 
  to 
  date 
  

   and 
  as 
  a 
  manual 
  of 
  the 
  geology 
  of 
  the 
  globe 
  is 
  much 
  more 
  valuable 
  

   than 
  either 
  the 
  original 
  German 
  or 
  the 
  English 
  edition. 
  The 
  

   subject 
  matter, 
  comprising 
  175 
  pages 
  in 
  English, 
  is 
  expanded 
  to 
  

   333 
  pages 
  in 
  the 
  French 
  edition. 
  The 
  original 
  text 
  is 
  preserved, 
  

   but 
  four 
  times 
  as 
  many 
  figures 
  are 
  introduced 
  and 
  the 
  annotation 
  

   in 
  the 
  form 
  of 
  footnotes 
  is 
  for 
  some 
  subjects 
  as 
  voluminous 
  as 
  

   the 
  original 
  text. 
  Those 
  who 
  have 
  tried 
  to 
  use 
  the 
  original 
  will 
  

   appreciate 
  the 
  value 
  of 
  de 
  Margerie 
  's 
  contributions 
  and 
  be 
  pre- 
  

   pared 
  to 
  confer 
  on 
  him 
  a 
  vote 
  of 
  thanks 
  for 
  the 
  great 
  labor 
  

   which 
  he 
  has 
  performed 
  so 
  well. 
  Suess 
  was 
  a 
  master 
  of 
  the 
  

   geological 
  literature 
  of 
  the 
  world 
  beyond 
  any 
  other 
  man 
  in 
  his 
  

   generation. 
  He 
  condensed 
  and 
  organized 
  it 
  into 
  a 
  great 
  work, 
  

   but 
  it 
  was 
  so 
  deficient 
  in 
  maps 
  that 
  reading 
  was 
  difficult 
  and 
  

   many 
  sections 
  could 
  not 
  be 
  clearly 
  understood 
  unless 
  the 
  reader 
  

   made 
  a 
  search 
  for 
  appropriate 
  maps 
  and 
  often 
  the 
  original 
  

   articles. 
  This 
  was 
  many 
  times 
  either 
  difficult 
  or 
  impossible. 
  

   The 
  mantle 
  of 
  Suess 
  as 
  custodian 
  of 
  the 
  world's 
  literature 
  has 
  

   descended 
  to 
  de 
  Margerie 
  and 
  geologists 
  will 
  find 
  the 
  host 
  of 
  

   additional 
  references 
  to 
  recent 
  literature 
  one 
  of 
  the 
  most 
  valuable 
  

   features 
  of 
  the 
  work. 
  

  

  The 
  index 
  volume 
  is 
  made 
  effective 
  by 
  a 
  system 
  of 
  cross 
  ref- 
  

  

  