﻿112 
  

  

  Mr. 
  W. 
  J. 
  ^oung 
  and 
  others. 
  Effect 
  of 
  

  

  during 
  a 
  visit 
  to 
  Townsville, 
  joined 
  in 
  the 
  research. 
  The 
  experiments 
  were 
  

   of 
  three 
  kinds. 
  In 
  a 
  first 
  series 
  the 
  effect 
  of 
  vigorous 
  exercise 
  of 
  short 
  

   duration 
  was 
  studied. 
  The 
  effort 
  consisted 
  in 
  running 
  up 
  and 
  down 
  a 
  

   staircase, 
  about 
  15 
  feet 
  high, 
  as 
  fast 
  as 
  possible 
  ; 
  with 
  few 
  exceptions 
  the 
  

   feat 
  was 
  repeated 
  10 
  times, 
  and 
  the 
  time 
  taken 
  varied 
  from 
  118 
  to 
  

   150 
  seconds. 
  

  

  The 
  second 
  series 
  comprised 
  a 
  number 
  of 
  experiments, 
  in 
  which 
  the 
  

   exercise 
  consisted 
  in 
  walking 
  for 
  a 
  varying 
  period 
  at 
  a 
  moderate 
  pace 
  (three 
  

   to 
  four 
  miles 
  an 
  hour) 
  during 
  the 
  hottest 
  hours 
  of 
  the 
  day. 
  In 
  one 
  walking 
  

   experiment 
  on 
  a 
  very 
  hot 
  day 
  (dry 
  bulb 
  86 
  - 
  4°, 
  wet 
  bulb 
  8r0°), 
  the 
  observa- 
  

   tions 
  were 
  taken 
  on 
  three 
  subjects 
  (I, 
  II, 
  and 
  III) 
  at 
  quarter-hourly 
  intervals 
  

   for 
  two 
  hours 
  (the 
  duration 
  of 
  the 
  walk), 
  and 
  this 
  experiment 
  is 
  treated 
  

   separately, 
  the 
  observations 
  being 
  plotted 
  in 
  the 
  accompanying 
  chart. 
  

  

  In 
  a 
  third 
  series 
  of 
  observations 
  the 
  effect 
  of 
  extremely 
  high 
  and 
  humid 
  

  

  14 
  O 
  

  

  IZO 
  

  

  IOO 
  

   180 
  

   l6o 
  

   140 
  

   120 
  

   IOO 
  

   80 
  

   103° 
  

  

  o 
  

  

  102 
  

   101° 
  

   100° 
  

  

  99 
  c 
  

   98° 
  

  

  

  / 
  

  

  

  1 
  1 
  | 
  1 
  

  

  Blood 
  pressure 
  

  

  

  

  / 
  

  

  \/ 
  

  

  / 
  

  

  / 
  

  

  \ 
  

  

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  / 
  * 
  

  

  

  

  

  

  

  

  1 
  

  

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  / 
  

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  / 
  

  

  

  

  

  

  

  1 
  

  

  11/ 
  

  

  

  

  

  

  

  

  

  

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  f 
  

  

  

  

  

  

  

  1 
  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  15 
  30 
  45 
  60 
  75 
  90 
  105 
  120 
  

   Time 
  in 
  minutes 
  

  

  Chart 
  of 
  Walking 
  Experiment. 
  (See 
  text. 
  

  

  