﻿5G 
  

  

  REPORT 
  OF 
  COMMISSIONER 
  OP 
  PISH 
  AND 
  FISHERIES. 
  

  

  [54] 
  

  

  Iii 
  calculating 
  the 
  number 
  of 
  lamp-hours 
  I 
  estimate 
  a 
  10 
  candle-power 
  

   lamp 
  as 
  taking 
  a 
  current 
  double 
  that 
  of 
  au 
  8 
  candle-power 
  lamp. 
  It- 
  

   then 
  appears 
  that 
  the 
  rae'an 
  cost 
  per 
  caudle 
  power 
  per 
  hour 
  is 
  

  

  / 
  2 
  528 
  — 
  \ 
  A(>41 
  pPTltS 
  

  

  The 
  coal-gas 
  company 
  of 
  Washington 
  supplies 
  gas 
  of 
  17 
  candle? 
  

   power 
  used 
  from 
  a 
  4-foot 
  bat-wing 
  burner, 
  at 
  $1.75 
  per 
  1,000 
  cubic 
  feet. 
  

   The 
  cost 
  of 
  such 
  a 
  jet 
  becomes 
  (i^ovf^) 
  0.041176 
  cents 
  per 
  candle- 
  

   power 
  per 
  hour, 
  or 
  somewhat 
  more 
  than 
  our 
  light 
  is 
  costing 
  us 
  on 
  board 
  

   this 
  ship. 
  

  

  1 
  have 
  purposely 
  omitted 
  the 
  cost 
  of 
  labor, 
  as 
  the 
  dynamo 
  is 
  run 
  by 
  

   a 
  coal-heaver, 
  who 
  performs 
  other 
  than 
  this 
  duty. 
  

  

  VENTILATION. 
  

  

  The 
  quantity 
  of 
  air 
  induced 
  by 
  the 
  fan 
  remains 
  practically 
  constant, 
  

   ceteris 
  paribus, 
  and 
  the 
  efficiency 
  is 
  the 
  same 
  as 
  recorded 
  in 
  my 
  last 
  

   report. 
  We 
  have 
  put 
  new 
  throttles 
  on 
  the 
  motor, 
  and 
  have 
  led 
  the 
  

   drain-pipe 
  to 
  the 
  ash-pans. 
  Owing 
  to 
  the 
  humming 
  of 
  the 
  fan 
  some- 
  

   what 
  resembling 
  the 
  sound 
  of 
  a 
  large 
  steam-whistle, 
  its 
  speed 
  was 
  

   purposely 
  limited 
  during 
  our 
  (anise 
  in 
  (he 
  foggy 
  latitudes 
  of 
  the 
  

   Grand 
  Banks 
  last 
  summer. 
  The 
  fan 
  has 
  been 
  used 
  only 
  a 
  few 
  hours 
  

   during 
  each 
  night, 
  as 
  the 
  enormous 
  inefficiency 
  of 
  the 
  Wise 
  motor 
  

   (which 
  drives 
  it) 
  causes 
  an 
  expenditure 
  of 
  about 
  50 
  pounds 
  of 
  coal 
  per 
  

   hour. 
  We 
  manage, 
  however, 
  to 
  keep 
  the 
  sleeping 
  apartments 
  tolerably 
  

   free 
  of 
  bad 
  air 
  during 
  the 
  night. 
  

  

  STEAM 
  HEATERS. 
  

  

  The 
  steam 
  radiators 
  appear 
  to 
  be 
  deficient 
  in 
  surface 
  in 
  very 
  cold 
  

   weather. 
  The 
  drainage 
  of 
  the 
  cabin 
  heaters, 
  and 
  also 
  the 
  lower 
  labora- 
  

  

  Fig. 
  9. 
  

  

  tory 
  heater, 
  has 
  been 
  improved 
  by 
  substituting 
  three-fourths 
  for 
  one- 
  

   half 
  inch 
  pipe. 
  The 
  number 
  of 
  leaks 
  in 
  the 
  heater 
  pipes 
  has 
  dimin- 
  

  

  