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logbookmore about logbook

logbook


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Log  \Log\,  n.  [Icel.  l[=a]g  a  felled  tree,  log  akin  to  E.  lie. 
  See  {Lie}  to  lie  prostrate.] 
  1.  A  bulky  piece  of  wood  which  has  not  been  shaped  by  hewing 
  or  sawing. 
 
  2.  [Prob.  the  same  word  as  in  sense  1;  cf  LG  log  lock, 
  Dan.  log  Sw  logg.]  (Naut.)  An  apparatus  for  measuring 
  the  rate  of  a  ship's  motion  through  the  water. 
 
  Note:  The  common  log  consists  of  the  log-chip,  or  logship, 
  often  exclusively  called  the  log  and  the  log  line  the 
  former  being  commonly  a  thin  wooden  quadrant  of  five  or 
  six  inches  radius,  loaded  with  lead  on  the  arc  to  make 
  it  float  with  the  point  up  It  is  attached  to  the  log 
  line  by  cords  from  each  corner.  This  line  is  divided 
  into  equal  spaces,  called  knots,  each  bearing  the  same 
  proportion  to  a  mile  that  half  a  minute  does  to  an 
  hour.  The  line  is  wound  on  a  reel  which  is  so  held  as 
  to  let  it  run  off  freely.  When  the  log  is  thrown,  the 
  log-chip  is  kept  by  the  water  from  being  drawn  forward, 
  and  the  speed  of  the  ship  is  shown  by  the  number  of 
  knots  run  out  in  half  a  minute.  There  are  improved 
  logs,  consisting  of  a  piece  of  mechanism  which  being 
  towed  astern,  shows  the  distance  actually  gone  through 
  by  the  ship,  by  means  of  the  revolutions  of  a  fly, 
  which  are  registered  on  a  dial  plate. 
 
  3.  Hence:  The  record  of  the  rate  of  ship's  speed  or  of  her 
  daily  progress;  also  the  full  nautical  record  of  a  ship's 
  cruise  or  voyage;  a  log  slate;  a  log  book. 
 
  4.  A  record  and  tabulated  statement  of  the  work  done  by  an 
  engine,  as  of  a  steamship,  of  the  coal  consumed,  and  of 
  other  items  relating  to  the  performance  of  machinery 
  during  a  given  time. 
 
  5.  (Mining)  A  weight  or  block  near  the  free  end  of  a  hoisting 
  rope  to  prevent  it  from  being  drawn  through  the  sheave. 
 
  {Log  board}  (Naut.),  a  board  consisting  of  two  parts  shutting 
  together  like  a  book,  with  columns  in  which  are  entered 
  the  direction  of  the  wind,  course  of  the  ship,  etc., 
  during  each  hour  of  the  day  and  night.  These  entries  are 
  transferred  to  the  log  book.  A  folding  slate  is  now  used 
  instead. 
 
  {Log  book},  or  {Logbook}  (Naut.),  a  book  in  which  is  entered 
  the  daily  progress  of  a  ship  at  sea,  as  indicated  by  the 
  log  with  notes  on  the  weather  and  incidents  of  the 
  voyage;  the  contents  of  the  log  board. 
 
  {Log  cabin},  {Log  house},  a  cabin  or  house  made  of  logs. 
 
  {Log  canoe},  a  canoe  made  by  shaping  and  hollowing  out  a 
  single  log 
 
  From  WordNet  r  1.6  [wn]: 
 
  logbook 
  n  :  a  book  in  which  the  log  is  written 




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