﻿210 
  

  

  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  

  

  [26] 
  

  

  turn. 
  The 
  hempen 
  string 
  was 
  so 
  slight 
  as 
  to 
  be 
  easily 
  broken 
  when 
  

   the 
  lever 
  had 
  reached 
  the 
  limit 
  of 
  its 
  excursion. 
  (Fig. 
  17.) 
  

  

  Tic. 
  17. 
  — 
  The 
  Talisman 
  thermometer 
  

   frame 
  aurt 
  sounding-lead. 
  

  

  gn/T 
  -~-\ 
  

  

  Fig. 
  18.— 
  The 
  Scottish 
  thermometer 
  

   frame. 
  

  

  In 
  the 
  work 
  at 
  the 
  Scottish 
  marine 
  station, 
  at 
  Granton, 
  Edinburgh, 
  

   the 
  Magnaghi 
  case 
  is 
  modified 
  in 
  still 
  another 
  way 
  by 
  the 
  substitution, 
  

   for 
  the 
  propeller, 
  of 
  a 
  detaching 
  lever 
  at 
  the 
  top, 
  as 
  shown 
  by 
  Fig. 
  18, 
  

  

  