資料來源 : Webster's Revised Unabridged Dictionary (1913)

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.