﻿[9] 
  

  

  OPERATIONS 
  AT 
  NORTHVILLE 
  AND 
  ALPENA. 
  

  

  129 
  

  

  Temperature 
  of 
  .spring 
  water 
  used 
  at 
  Northville 
  Station 
  for 
  incubating 
  trout 
  eggs, 
  from 
  

   November 
  25, 
  1885, 
  to 
  April 
  15, 
  1886. 
  

  

  Northville, 
  Mich., 
  August 
  14, 
  188G. 
  

   S. 
  Mis. 
  70 
  9 
  

  

  