﻿Work 
  Measured 
  by 
  the 
  Discharge 
  of 
  Carbon 
  Dioxide. 
  173 
  

  

  served 
  to 
  count 
  the 
  respirations, 
  which, 
  however, 
  were 
  of 
  such 
  constant 
  

   frequency 
  under 
  conditions 
  of 
  work 
  and 
  rest 
  that 
  no 
  attempt 
  was 
  made 
  to 
  

   take 
  systematic 
  frequency 
  counts. 
  

  

  Points 
  of 
  Note. 
  — 
  The 
  hourly 
  increase 
  of 
  CO2 
  discharge 
  during 
  the 
  morning 
  

   and 
  the 
  afternoon 
  ; 
  average 
  discharge 
  for 
  last 
  three 
  morning 
  hours 
  = 
  17'58, 
  

   for 
  the 
  afternoon 
  hours 
  18 
  - 
  67 
  ; 
  the 
  restorative 
  effect 
  of 
  the 
  dinner 
  hour 
  and 
  

   of 
  short 
  rests. 
  

  

  Labourer 
  No. 
  1. 
  — 
  Friday, 
  December 
  6, 
  1918. 
  

  

  Time. 
  

  

  Time 
  of 
  

   collection 
  

  

  Litres. 
  

  

  C.c. 
  per 
  

   sec. 
  

  

  C0. 
  2 
  per 
  

   cent. 
  

  

  C0 
  2 
  c.c. 
  

   per 
  sec. 
  

  

  Remarks. 
  

  

  7 
  h. 
  30 
  m. 
  

  

  8 
  h. 
  m. 
  

  

  3 
  m. 
  

   9h.0m. 
  

   3 
  m. 
  

  

  10 
  h. 
  m. 
  

  

  3 
  m. 
  

  

  11 
  h. 
  m. 
  

  

  3 
  m. 
  

  

  12 
  h. 
  m. 
  

  

  3 
  m. 
  

  

  lLOm. 
  

  

  2 
  h. 
  m. 
  

  

  3 
  m. 
  

  

  3 
  h. 
  m. 
  

  

  3 
  m. 
  

  

  4 
  h. 
  m. 
  

  

  3 
  m. 
  

  

  60 
  

  

  50 
  

   60 
  

   40 
  

   60 
  

   40 
  

   60 
  

   40 
  

   60 
  

   40 
  

   60 
  

  

  60 
  

  

  45 
  

   60 
  

   40 
  

   60 
  

   40 
  

   60 
  

  

  14 
  

  

  22 
  

   18 
  

   21 
  

   20 
  

   22 
  

   18 
  

   24 
  

   20 
  

   23 
  

   19 
  

  

  21 
  

  

  22 
  

   19 
  

   20 
  

   16 
  

  

  23 
  

   20 
  

  

  233 
  

  

  440 
  

   300 
  

   525 
  

   333 
  

   555 
  

   300 
  

   600 
  

   333 
  

   575 
  

   316 
  

  

  350 
  

  

  488 
  

   316 
  

   500 
  

   266 
  

   575 
  

   333 
  

  

  2-2 
  

  

  2-8 
  

   2 
  4 
  

   2-8 
  

   2 
  -5 
  

  

  2-8 
  

  

  

   ■7 
  

   3* 
  

   1* 
  

  

  3 
  4 
  

   3-0 
  

  

  5-12 
  

  

  12-32 
  

  

  7 
  -20 
  

   14 
  -70 
  

  

  8- 
  32 
  

  

  16 
  -65 
  

  

  9- 
  00 
  

  

  17 
  -40 
  

   9 
  00 
  

  

  17 
  -00 
  

  

  8 
  -80 
  

  

  9-8 
  

  

  14 
  -64 
  

   8 
  -53 
  

  

  16 
  50 
  

   8-24 
  

  

  19-50 
  

  

  10 
  '00 
  

  

  After 
  £ 
  mile 
  walk 
  and 
  

   10 
  min. 
  rest. 
  

  

  • 
  Tapping 
  and 
  trowelling. 
  

  

  Immediately 
  after 
  j 
  mile 
  

   walk. 
  

  

  !* 
  Tapping 
  and 
  trowelling. 
  

  

  * 
  Two 
  samples 
  of 
  each 
  of 
  these 
  two 
  bags 
  were 
  collected 
  at 
  once 
  by 
  mercury 
  displacement 
  and 
  

   handed 
  over 
  to 
  Dr. 
  Pembrey 
  for 
  independent 
  analysis. 
  His 
  report 
  was 
  as 
  follows 
  : 
  — 
  

  

  C0 
  2 
  . 
  2 
  . 
  E.Q. 
  

  

  Sample 
  I 
  3 
  "16 
  2-96 
  1-04 
  

  

  Sample 
  II 
  2 
  99 
  2-97 
  1-00 
  

  

  The 
  noteworthy 
  points 
  are 
  as 
  on 
  the 
  first 
  two 
  days, 
  viz., 
  the 
  progressive 
  

   hourly 
  increase 
  of 
  CO2, 
  and 
  the 
  restorative 
  effect 
  of 
  the 
  dinner 
  hour 
  and 
  of' 
  

   short 
  rests. 
  

  

  Average 
  hourly 
  discharge 
  of 
  CO2 
  : 
  forenoon, 
  17'02 
  ; 
  afternoon, 
  16"88. 
  

   The 
  mean 
  hourly 
  discharge 
  of 
  C0 
  2 
  (gross 
  expenditure) 
  for 
  the 
  three 
  days 
  

   was 
  : 
  — 
  

  

  Forenoon, 
  17-02 
  Afternoon, 
  16-88. 
  

  

  General 
  hourly 
  mean 
  for 
  three 
  days 
  = 
  16 
  - 
  41 
  

   " 
  Eesting 
  C0 
  2 
  " 
  = 
  4 
  00 
  

   Net 
  cost 
  of 
  work 
  = 
  1241 
  c.c. 
  C0 
  2 
  per 
  sec. 
  

  

  = 
  248-2 
  Kals 
  per 
  hour. 
  

  

  VOL. 
  XCI. 
  — 
  B. 
  O 
  

  

  