﻿58 
  Mr. 
  O. 
  Rosenheim. 
  A 
  Preliminary 
  Study 
  of 
  the 
  Energy 
  

  

  different 
  subjects 
  is 
  more 
  variable, 
  but, 
  in 
  all 
  forms 
  of 
  work, 
  Subject 
  A, 
  

   probably 
  owing 
  to 
  her 
  previous 
  training 
  as 
  munition 
  worker, 
  performed 
  the 
  

   work 
  with 
  a 
  minimum 
  expenditure 
  of 
  energy. 
  The 
  work 
  economy 
  of 
  this 
  

   subject 
  is 
  also 
  seen 
  in 
  the 
  experiment 
  in 
  which 
  she 
  performed 
  the 
  relatively 
  

   strenuous 
  work 
  of 
  metal 
  filing 
  (60 
  strokes 
  per 
  minute), 
  and 
  in 
  which 
  her 
  

   energy 
  expenditure 
  only 
  rose 
  slightly, 
  over 
  that 
  of 
  the 
  hardest 
  work 
  on 
  the 
  

   lathe 
  (see 
  Table 
  III). 
  The 
  general 
  results 
  of 
  the 
  work 
  experiments 
  lead 
  to 
  

   the 
  conclusion, 
  which 
  might 
  not 
  a 
  priori 
  be 
  expected, 
  that 
  the 
  energy 
  

   required 
  for 
  lathe 
  working 
  is 
  relatively 
  small. 
  

  

  Th-e 
  Daily 
  Food 
  Requirements 
  of 
  Lathe 
  Workers. 
  

  

  By 
  means 
  of 
  the 
  data 
  obtained, 
  although 
  they 
  are 
  not 
  perhaps 
  sufficiently 
  

   numerous 
  to 
  warrant 
  final 
  conclusions, 
  we 
  may 
  arrive 
  at 
  an 
  approximate 
  

   estimate 
  of 
  the 
  food 
  requirements, 
  expressed 
  in 
  calories, 
  of 
  the 
  women 
  who 
  

   formed 
  the 
  subjects 
  of 
  this 
  inquiry. 
  The 
  following 
  Table 
  (Table 
  VI) 
  shows 
  

   the 
  energy 
  expenditure 
  of 
  the 
  subjects 
  in 
  the 
  three 
  periods 
  of 
  sleep, 
  work, 
  

   and 
  recreation, 
  calculated 
  on 
  the 
  basis 
  of 
  the 
  considerations 
  set 
  forth 
  in 
  the 
  

   introduction. 
  The 
  sum 
  of 
  these, 
  multiplied 
  with 
  the 
  figure 
  for 
  the 
  total 
  body 
  

   surface 
  of 
  the 
  subject 
  in 
  each 
  case, 
  represents 
  what 
  might 
  be 
  termed 
  the 
  

   " 
  net 
  " 
  calorie 
  requirements, 
  and 
  an 
  increase 
  of 
  15 
  per 
  cent, 
  on 
  this 
  figure 
  

   represents 
  the 
  corresponding 
  calorie 
  values 
  of 
  the 
  food 
  as 
  purchased. 
  

  

  It 
  will 
  be 
  seen 
  that 
  the 
  final 
  figures 
  show 
  that 
  the 
  calorie 
  values 
  of 
  the 
  

   food 
  required 
  by 
  women 
  engaged 
  on 
  lathe 
  work 
  vary 
  from 
  2400 
  to 
  

   2800 
  calories. 
  It 
  is 
  interesting 
  to 
  compare 
  this 
  result 
  with 
  the 
  recom- 
  

   mendations 
  made 
  by 
  L. 
  E. 
  Hill 
  and 
  his 
  co-workers, 
  based 
  on 
  their 
  statistical 
  

   nquiries.* 
  For 
  a 
  man 
  on 
  moderate 
  munition 
  work, 
  3000-3500 
  calories 
  

   per 
  day 
  were 
  suggested 
  as 
  a 
  standard, 
  the 
  corresponding 
  figure 
  for 
  women 
  

   being 
  2400-2800 
  calories. 
  The 
  absolute 
  agreement 
  of 
  the 
  figures 
  obtained 
  

   by 
  these 
  two 
  inquiries, 
  based 
  on 
  entirely 
  different 
  methods, 
  seems 
  to 
  be 
  more 
  

   than 
  an 
  accidental 
  coincidence. 
  It 
  is 
  hardly 
  necessary 
  to 
  point 
  out 
  that, 
  in 
  

   assessing 
  the 
  food 
  requirements 
  of 
  women 
  workers, 
  due 
  consideration 
  must 
  

   be 
  paid 
  not 
  only 
  to 
  the 
  quantitative 
  side, 
  as 
  dealt 
  with 
  above, 
  but 
  also 
  to 
  the 
  

   qualitative 
  side, 
  in 
  respect 
  to 
  the 
  presence 
  in 
  adequate 
  amounts 
  of 
  the 
  

   all-important 
  accessory 
  factors 
  or 
  vitamines. 
  

  

  * 
  See 
  Memorandum 
  No. 
  19, 
  ' 
  Health 
  of 
  Mun. 
  Work. 
  Com.,' 
  1917. 
  

  

  