﻿TEMPERATURE 
  AT 
  FORT 
  SULLY 
  1872 
  TO 
  1875. 
  129 
  

  

  So 
  far 
  as 
  the 
  annual 
  and 
  monthly 
  means 
  show, 
  the 
  year 
  1873 
  was 
  

   about 
  as 
  favorable 
  as 
  to 
  temperature 
  as 
  1871 
  ; 
  and 
  as 
  may 
  be 
  seen 
  by 
  

   reference 
  to 
  the 
  table 
  of 
  rainfall 
  (Table 
  VII), 
  it 
  was 
  equally 
  favorable 
  

   in 
  this 
  respect. 
  As 
  there 
  was 
  no 
  marked 
  or 
  general 
  invasion 
  in 
  1871 
  or 
  

   1872, 
  it 
  cannot 
  be 
  claimed 
  that 
  the 
  permanent 
  breeding 
  grounds 
  had 
  

   been 
  exhausted 
  by 
  migrations, 
  as 
  it 
  is 
  conceded 
  that 
  there 
  was 
  no 
  general 
  

   invasion 
  in 
  1873, 
  but 
  was 
  in 
  1874. 
  Let 
  us 
  look 
  to 
  the 
  daily 
  records 
  of 
  

   the 
  former 
  and 
  compare 
  them 
  with 
  those 
  of 
  the 
  latter 
  year 
  and 
  see 
  if 
  

   they 
  show 
  any 
  important 
  differences. 
  

  

  For 
  this 
  purpose 
  we 
  select 
  Fort 
  Sully 
  as 
  the 
  station 
  within 
  the 
  per- 
  

   manent 
  breeding 
  grounds 
  showing 
  the 
  most 
  complete 
  record. 
  The 
  fol- 
  

   lowing 
  table 
  is 
  the 
  daily 
  record 
  of 
  the 
  maximum 
  and 
  minimum 
  temper- 
  

   ature 
  from 
  October, 
  1872, 
  to 
  June, 
  1875. 
  

   9l 
  

  

  