﻿48 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  [46] 
  

  

  Synopsis 
  of 
  the 
  steam 
  log 
  of 
  the 
  U. 
  S. 
  Fish 
  Commission 
  steamer 
  Albatross 
  during 
  the 
  year 
  

   1885, 
  the 
  vessel 
  during 
  that 
  period 
  being 
  employed 
  in 
  deep-sea 
  exploration. 
  

  

  [Kind 
  of 
  engine. 
  — 
  Twin 
  screw, 
  compound 
  engine, 
  surface 
  condenser; 
  inclined.] 
  

  

  Number 
  of 
  cylinders 
  : 
  

  

  High 
  pressure 
  2 
  

  

  Low 
  pressure 
  — 
  2 
  

  

  Diameter 
  of 
  cylinders, 
  in 
  inches 
  : 
  

  

  High 
  pressure 
  - 
  18 
  

  

  Low 
  pressure 
  34 
  

  

  Stroke 
  of 
  pistons, 
  in 
  feet 
  2i 
  

  

  Mean 
  point 
  of 
  cutting 
  off 
  the 
  steam, 
  from 
  commencement 
  of 
  stroke 
  of 
  

   pistons, 
  in 
  inches 
  : 
  

  

  High 
  pressure 
  18. 
  34 
  

  

  Low 
  pressure 
  16.45 
  

  

  Mean 
  number 
  of 
  holes 
  of 
  throttle-valve 
  open 
  _ 
  2.9 
  

  

  Mean 
  vacuum 
  in 
  condenser, 
  in 
  inches 
  of 
  mercury 
  -•» 
  23. 
  07 
  

  

  Mean 
  steam 
  pressure 
  per 
  square 
  inch, 
  above 
  the 
  atmosphere 
  : 
  

  

  Boiler 
  pressure 
  pounds.. 
  48. 
  IT 
  

  

  Receiver 
  pressure 
  do.... 
  8.37 
  

  

  Mean 
  temperature, 
  in 
  degrees, 
  Fahrenheit 
  : 
  

  

  Engine 
  room 
  100. 
  8 
  

  

  On 
  deck 
  - 
  65. 
  1 
  

  

  Injection-water 
  67. 
  68 
  

  

  Discharge- 
  water 
  — 
  96.91 
  

  

  Feed- 
  water 
  74. 
  15 
  

  

  Total 
  time 
  the 
  fires 
  were 
  lighted 
  hours.. 
  8,514 
  

  

  Total 
  time 
  the 
  engines 
  were 
  in 
  operation, 
  the 
  ship 
  being 
  on 
  her 
  course, 
  

  

  in 
  free 
  route 
  hours.. 
  1,5841$ 
  

  

  Total 
  number 
  of 
  revolutions 
  : 
  

  

  Starboard 
  engine 
  * 
  6,213,850 
  

  

  Port 
  engine 
  6,199,567 
  

  

  Mean 
  number 
  of 
  revolutions 
  per 
  minute 
  : 
  

  

  Starboard 
  engine 
  <>5. 
  37 
  

  

  Port 
  engine 
  - 
  65.23 
  

  

  Total 
  number 
  of 
  knots 
  13,240.26 
  

  

  Mean 
  number 
  of 
  knots 
  per 
  hour 
  8.35 
  

  

  Total 
  coal 
  consumed 
  tons., 
  1, 
  531££f|j 
  

  

  Total 
  weight 
  of 
  refuse 
  from 
  coal 
  do 
  329y 
  : 
  HA 
  

  

  Total 
  weight 
  of 
  coal 
  consumed 
  while 
  the 
  engines 
  were 
  in 
  opera- 
  

   tion 
  tons.. 
  836^7 
  

  

  Mean 
  quantity 
  of 
  coal 
  consumed 
  per 
  hour 
  while 
  the 
  engines 
  were 
  in 
  

  

  operation 
  pounds.. 
  1, 
  182 
  

  

  Total 
  oil 
  consumed 
  : 
  

  

  Red 
  M 
  engine 
  oil 
  gallons.. 
  442 
  

  

  600 
  W. 
  cylinder 
  oil 
  do 
  169 
  

  

  Electric 
  oil 
  do 
  36 
  

  

  Lard 
  oil 
  do.... 
  350 
  

  

  Tallow 
  consumed 
  pounds.. 
  69 
  

  

  Wiping 
  stuff 
  consumed 
  do 
  419 
  

  

  Greatest 
  draught 
  forward 
  and 
  aft 
  feet.. 
  M\ 
  & 
  13-j 
  7 
  ^ 
  

  

  Least 
  draught 
  forward 
  and 
  aft 
  .do 
  9J& 
  10f£ 
  

  

  Average 
  draught 
  for 
  the 
  whole 
  steaming 
  do 
  10if 
  & 
  1 
  2^ 
  

  

  Helicoidal 
  area 
  of 
  each 
  screw 
  square 
  feet. 
  . 
  4 
  - 
  J. 
  02 
  

  

  Diameter 
  _ 
  feet 
  . 
  . 
  9 
  

  

  Pitch 
  (mean) 
  , 
  do.... 
  U'[ 
  

  

  