﻿Work 
  Measured 
  by 
  the 
  Discharge 
  of 
  Carbon 
  Dioxide. 
  171 
  

  

  •estimation. 
  But 
  the 
  detailed 
  study 
  of 
  this 
  particular 
  form 
  of 
  work 
  was 
  

   foreign 
  to 
  my 
  present 
  purpose, 
  which 
  is 
  to 
  make 
  good 
  the 
  method 
  of 
  estima- 
  

   ting 
  the 
  cost 
  of 
  work 
  of 
  unknown 
  mechanical 
  equivalence 
  in 
  terms 
  of 
  CO* 
  

   discharged. 
  

  

  The 
  next 
  step 
  in 
  the 
  enquiry 
  was 
  to 
  take 
  hourly 
  observations 
  of 
  the 
  C0 
  2 
  

   discharge 
  for 
  the 
  complete 
  day's 
  work 
  and 
  for 
  several 
  days. 
  

  

  20 
  -| 
  

  

  d 
  

   in 
  

  

  mIO- 
  

  

  o 
  

   o 
  

  

  o 
  

  

  7-56 
  

   7-o8 
  

  

  Ip.m. 
  

  

  18-12 
  

  

  13.98 
  

  

  15.00 
  

  

  7-32 
  

  

  8-65 
  

  

  5-8o 
  

  

  --400 
  

   (attest) 
  

  

  Z 
  

  

  Hours 
  

  

  Labourer 
  No. 
  1. 
  — 
  Age 
  51. 
  Weight 
  (clothed)* 
  84 
  kilos, 
  

  

  (Surf. 
  1-96 
  M 
  2 
  .) 
  Wednesday, 
  December 
  4, 
  1918. 
  

  

  height 
  1-71 
  M. 
  

  

  Time. 
  

  

  Time 
  of 
  

   collection, 
  

   sees. 
  

  

  Litres. 
  

  

  C.c. 
  per 
  

   sec. 
  

  

  C0 
  2 
  per 
  

   cent. 
  

  

  C0 
  2 
  c.c. 
  

   per 
  sec. 
  

  

  7 
  h. 
  30 
  m. 
  

  

  60 
  

  

  11 
  

  

  183 
  

  

  2-4 
  

  

  4-39 
  

  

  8 
  h. 
  30 
  m. 
  

  

  45 
  

  

  12 
  

  

  266 
  

  

  2-8 
  

  

  7*48 
  

  

  33 
  m. 
  

  

  CO 
  

  

  13 
  

  

  216 
  

  

  2-3 
  

  

  4-96 
  

  

  9 
  h. 
  30 
  m. 
  

  

  . 
  42 
  

  

  14 
  

  

  333 
  

  

  3 
  2 
  

  

  10-65 
  

  

  34 
  m. 
  

  

  60 
  

  

  12 
  

  

  200 
  

  

  2-8 
  

  

  5 
  -60 
  

  

  10 
  h. 
  30 
  m. 
  

  

  40 
  

  

  17 
  

  

  425 
  

  

  3*5 
  

  

  14 
  -86 
  

  

  34 
  111. 
  

  

  60 
  

  

  14 
  

  

  233 
  

  

  3-0 
  

  

  7-00 
  

  

  11 
  h. 
  30 
  m. 
  

  

  45 
  

  

  20 
  

  

  444 
  

  

  3 
  -4 
  

  

  15 
  -09 
  

  

  34 
  id. 
  

  

  60 
  

  

  11 
  

  

  183 
  

  

  2-8 
  

  

  5 
  -12 
  

  

  1 
  h. 
  m. 
  

  

  55 
  

  

  15 
  

  

  272 
  

  

  3-0 
  

  

  8-16 
  

  

  2 
  h. 
  m. 
  

  

  43 
  

  

  18 
  

  

  418 
  

  

  2 
  -8 
  

  

  11 
  -70 
  

  

  3 
  m. 
  

  

  60 
  

  

  14 
  

  

  233 
  

  

  2 
  2 
  

  

  5-12 
  

  

  3 
  b. 
  m. 
  

  

  45 
  

  

  20 
  

  

  444 
  

  

  3 
  2 
  

  

  14 
  -20 
  

  

  4 
  m. 
  

  

  60 
  

  

  17 
  

  

  283 
  

  

  2-4f 
  

  

  6-79 
  

  

  4 
  h. 
  m. 
  

  

  43 
  

  

  21 
  

  

  488 
  

  

  3-8 
  

  

  18-54 
  

  

  4 
  m. 
  

  

  60 
  

  

  18 
  

  

  300 
  

  

  2 
  -6 
  

  

  7-80 
  

  

  Remarks. 
  

  

  After 
  i 
  hour 
  walk 
  fol- 
  

   lowed 
  by 
  5 
  min. 
  sitting. 
  

  

  ~] 
  Laying 
  concrete 
  floor. 
  

   S- 
  " 
  Trowelling 
  " 
  and 
  

   j 
  "tapping." 
  

  

  j- 
  " 
  Tapping." 
  

  

  > 
  Trowelling 
  on 
  his 
  knees. 
  

  

  Immediately 
  after 
  

   walk, 
  fast. 
  

  

  " 
  Trowelling 
  " 
  

   " 
  tapping." 
  

  

  mile 
  

  

  and 
  

  

  * 
  Four 
  kilos, 
  allowed 
  for 
  weight 
  of 
  clothes, 
  

   f 
  Sample 
  analysed 
  by 
  small 
  Haldane 
  apparatus 
  

  

  CO. 
  

   2 
  

  

  2 
  "5 
  per 
  cent. 
  

   2-3 
  „ 
  „ 
  

  

  R.Q. 
  = 
  1 
  -09. 
  

  

  The 
  points 
  of 
  note 
  in 
  this 
  observation 
  are 
  : 
  — 
  

  

  1. 
  The 
  hourly 
  increase 
  of 
  CO2 
  discharge 
  during 
  each 
  period 
  of 
  work. 
  

  

  2. 
  The 
  restorative 
  effect 
  of 
  the 
  dinner-hour. 
  

  

  3. 
  The 
  rapid 
  fall 
  of 
  C0 
  2 
  during 
  a 
  rest 
  pause 
  of 
  three 
  or 
  four 
  minutes; 
  

  

  