﻿[27] 
  

  

  REPORT 
  ON 
  THERMOMETERS. 
  

  

  211 
  

  

  

  N 
  1 
  ^ 
  

  

  11 
  The 
  thermometer 
  T 
  is 
  supported 
  on 
  pivots, 
  pp, 
  in 
  the 
  frame 
  F, 
  and 
  

   kept 
  in 
  its 
  upright 
  position 
  by 
  tbe 
  pin 
  P, 
  which 
  dips 
  into 
  a 
  groove 
  in 
  

   tbe 
  top 
  of 
  tbe 
  instrument, 
  and 
  moves 
  freely 
  through 
  two 
  boles, 
  h 
  h, 
  in 
  

   the 
  frame. 
  A 
  lever, 
  L, 
  turning 
  on 
  a 
  pivot 
  in 
  

   the 
  frame, 
  works 
  in 
  a 
  slot 
  in 
  tbe 
  pin 
  P, 
  and 
  

   when 
  its 
  outer 
  end 
  is 
  depressed 
  tbe 
  pin 
  is 
  

   raised 
  out 
  of 
  tbe 
  groove 
  G. 
  A 
  spiral 
  spring, 
  

   S, 
  keeps 
  tbe 
  pin 
  in 
  position 
  wben 
  not 
  counter- 
  

   acted 
  by 
  tbe 
  lever. 
  Tbe 
  forked 
  end 
  of 
  t 
  lie 
  lever 
  

   embraces 
  the 
  sounding 
  line, 
  to 
  which 
  the 
  whole 
  

   apparatus 
  is 
  attached 
  when 
  in 
  use. 
  * 
  * 
  * 
  

   Wben 
  the 
  pin 
  P 
  is 
  raised, 
  the 
  thermometer 
  

   turns 
  on 
  its 
  pivots 
  by 
  its 
  own 
  weight, 
  and 
  is 
  

   letained 
  in 
  the 
  inverted 
  position 
  by 
  the 
  tootb 
  

   t, 
  attached 
  to 
  tbe 
  spring 
  s, 
  and 
  fitting 
  into 
  a 
  

   hole 
  in 
  tbe 
  projection/'. 
  

  

  u 
  Tbe 
  lever 
  is 
  elepressed 
  by 
  tbe 
  fall 
  of 
  a 
  weight, 
  

   B, 
  called 
  a 
  messenger, 
  along 
  the 
  line. 
  The 
  mes- 
  

   senger 
  is 
  the 
  invention 
  of 
  Captain 
  Ruug, 
  of 
  tbe 
  

   Meteorological 
  Institute, 
  Copenhagen. 
  It 
  is 
  

   made 
  in 
  two 
  parts, 
  so 
  that 
  it 
  can 
  be 
  titted 
  on 
  

   the 
  line 
  at 
  any 
  point 
  without 
  tiie 
  trouble 
  of 
  

   reeving. 
  

  

  "When 
  the 
  temperature 
  is 
  to 
  be 
  ascertained 
  

   at 
  two 
  or 
  more 
  depths 
  simultaneously, 
  a 
  mes- 
  

   senger 
  is 
  hung 
  by 
  a 
  cord 
  to 
  the 
  top 
  of 
  each 
  tber- 
  

   mometer, 
  except 
  the 
  lowest, 
  as 
  shown 
  in 
  the 
  

   figure. 
  Thus, 
  when 
  the 
  first 
  thermometer 
  is 
  in- 
  

   verted, 
  a 
  messenger 
  is 
  released, 
  which 
  inverts 
  

   tbe 
  next, 
  anel 
  so 
  on."* 
  

  

  This 
  contrivance 
  is 
  called 
  by 
  its 
  inventors 
  

   "the 
  Scottish 
  thermometer 
  frame,-' 
  and 
  was 
  

   described 
  by 
  Mr. 
  Hugh 
  P. 
  Mill 
  in 
  the 
  Proceed- 
  

   ings 
  of 
  the 
  Royal 
  Society 
  of 
  Edinburgh, 
  vol. 
  xii, 
  

   p. 
  029, 
  July, 
  1884. 
  

  

  The 
  new 
  pattern 
  " 
  Tanner 
  case," 
  which 
  is 
  now 
  

   used 
  by 
  the 
  Fish 
  Commission 
  anel 
  Coast 
  Sur- 
  

   vey, 
  was 
  invented 
  by 
  Lieut. 
  -Commander 
  Tan- 
  

   ner 
  in 
  1884. 
  (Fig. 
  19.) 
  

  

  It 
  is 
  a 
  modified 
  combination 
  of 
  tbe 
  Bailie- 
  

   Tanner 
  and 
  Magnaghi 
  cases, 
  retaining 
  tbe 
  pro- 
  

   peller 
  gear 
  and 
  clutches 
  for 
  the 
  sounding 
  wire 
  of 
  the 
  former 
  anel 
  one 
  

   of 
  the 
  upright 
  sielc 
  bars 
  of 
  the 
  latter. 
  The 
  thermometer 
  is 
  pivoteel 
  

   at 
  the 
  bottom, 
  and 
  wben 
  reversed 
  comes 
  up 
  hanging 
  clear 
  of 
  the 
  

  

  Fig. 
  10. 
  — 
  Tbo 
  Tanner 
  ther- 
  

   mometer 
  case, 
  now 
  form. 
  

  

  * 
  The 
  Scottish 
  Marine 
  Station 
  for 
  Scientific 
  Research, 
  Grauton, 
  Edinburgh; 
  its 
  work 
  

   and 
  prospects. 
  Edinburgh, 
  1885, 
  p. 
  35. 
  

  

  