﻿James 
  Dwight 
  Dana. 
  335 
  

  

  with 
  Harvard 
  College, 
  but 
  by 
  the 
  prompt 
  action 
  of 
  a 
  generous 
  

   friend 
  in 
  the 
  Yale 
  Faculty 
  in 
  providing 
  the 
  necessary 
  funds, 
  he 
  

   was 
  induced 
  to 
  remain 
  in 
  New 
  Haven 
  on 
  the 
  " 
  Silliman 
  Pro- 
  

   fessorship." 
  This 
  gentleman, 
  who 
  is 
  still 
  living, 
  remained 
  

   throughout 
  the 
  life 
  of 
  Mr. 
  Dana 
  one 
  of 
  his 
  closest 
  friends. 
  

  

  In 
  1859, 
  as 
  already 
  noted, 
  long 
  continued 
  over-work 
  brought 
  

   a 
  break- 
  down 
  of 
  a 
  serious 
  character 
  and 
  from 
  which 
  he 
  never 
  

   fully 
  recovered. 
  The 
  nervous 
  prostration 
  was 
  very 
  complete 
  

   at 
  first, 
  and 
  even 
  a 
  period 
  of 
  nearly 
  a 
  year 
  abroad, 
  from 
  Oct. 
  

   1859 
  to 
  August 
  1860, 
  seemed 
  to 
  have 
  little 
  result 
  in 
  the 
  way 
  of 
  

   restoration. 
  Although 
  later 
  some 
  degree 
  of 
  health 
  gradually 
  

   came 
  back, 
  he 
  was 
  always 
  subject 
  to 
  the 
  severest 
  limitations 
  until 
  

   the 
  end 
  of 
  his 
  life. 
  Only 
  those 
  immediately 
  associated 
  with 
  

   him 
  could 
  appreciate 
  the 
  inexorable 
  character 
  of 
  these 
  limitations 
  

   and 
  the 
  self-denial 
  that 
  was 
  involved 
  not 
  only 
  in 
  restricting 
  

   work 
  and 
  mental 
  effort, 
  but 
  also 
  in 
  avoiding 
  intercourse 
  with 
  

   other 
  men 
  of 
  science 
  and 
  friends 
  in 
  general, 
  in 
  which 
  he 
  always 
  

   found 
  the 
  greatest 
  pleasure. 
  

  

  Little 
  by 
  little 
  the 
  power 
  for 
  work 
  was 
  restored 
  and 
  by 
  hus- 
  

   banding 
  his 
  strength 
  so 
  much 
  was 
  accomplished 
  that, 
  besides 
  

   other 
  writing, 
  he 
  was 
  able 
  to 
  bring 
  out 
  in 
  1862 
  the 
  first 
  edition 
  of 
  

   his 
  Manual 
  of 
  Geology, 
  and 
  in 
  1864 
  the 
  Text 
  Book 
  of 
  Geol- 
  

   ogy, 
  and 
  four 
  years 
  later 
  his 
  last 
  and 
  most 
  important 
  contribu- 
  

   tion 
  to 
  Mineralogy, 
  the 
  fifth 
  edition 
  of 
  the 
  System. 
  

  

  This 
  last 
  great 
  labor, 
  extending 
  over 
  four 
  years, 
  was 
  followed 
  

   by 
  a 
  turn 
  of 
  ill 
  health 
  of 
  an 
  alarming 
  character 
  and 
  from 
  which 
  

   restoration 
  was 
  again 
  very 
  slow. 
  The 
  years 
  that 
  immediately 
  

   followed 
  were 
  filled 
  with 
  the 
  same 
  quiet 
  labor, 
  on 
  geological 
  

   investigations 
  in 
  the 
  field, 
  the 
  writing 
  of 
  original 
  papers 
  and 
  

   books, 
  the 
  editorial 
  work 
  of 
  this 
  Journal, 
  and 
  his 
  duties 
  as 
  a 
  

   college 
  instructor. 
  They 
  were 
  remarkably 
  productive 
  years, 
  

   notwithstanding 
  the 
  difficulties 
  contended 
  against, 
  notably 
  

   renewed 
  illness 
  in 
  1874 
  and 
  1880, 
  as 
  will 
  be 
  seen 
  by 
  reference 
  

   to 
  the 
  Bibliography. 
  A 
  large 
  number 
  of 
  important 
  papers- 
  

   were 
  published, 
  chiefly 
  in 
  this 
  Journal 
  : 
  new 
  editions 
  of 
  the 
  

   Manual 
  of 
  Geology 
  were 
  issued 
  in 
  1874 
  and 
  1880 
  ; 
  of 
  the 
  Text 
  

   Book 
  in 
  1874 
  and 
  1883 
  ; 
  while 
  a 
  new 
  geological 
  volume 
  called 
  

   " 
  The 
  Geological 
  Story 
  briefly 
  told," 
  was 
  issued 
  in 
  1875 
  and 
  

   one 
  on 
  " 
  Corals 
  and 
  Coral 
  Islands 
  " 
  in 
  1872. 
  

  

  