﻿286 
  

  

  G. 
  F. 
  Becker 
  — 
  Computing 
  Diffusion. 
  

  

  Diffusion 
  of 
  heat 
  and 
  motion 
  in 
  C. 
  G. 
  S. 
  units. 
  

  

  Subject 
  of 
  Diffusion. 
  

  

  Medium. 
  

  

  K 
  

  

  Heat, 
  

  

  Iron, 
  

  

  •225 
  

  

  u 
  

  

  Sandstone, 
  

  

  •023 
  11 
  

  

  " 
  

  

  Trachyte, 
  

  

  •010 
  28 
  

  

  " 
  

  

  Trap, 
  

  

  •007 
  86 
  

  

  (1 
  

  

  Average 
  of 
  rock, 
  

  

  •01 
  

  

  Laminar 
  motion, 
  

  

  Air, 
  

  

  •053 
  

  

  a 
  

  

  Water 
  at 
  10°0., 
  

  

  •013 
  2 
  

  

  Authority, 
  

   o 
  

  

  Angstrom 
  and 
  Tait. 
  

   Forbes 
  and 
  W. 
  Thomson. 
  

   Ayrton 
  and 
  Perry. 
  

   Forbes 
  and 
  W. 
  Thomson. 
  

  

  Stokes 
  and 
  Maxwell. 
  

   Poiseuilie, 
  Stokes. 
  

  

  Diffusion 
  Table, 
  giving 
  distances 
  in 
  terms 
  of 
  quality, 
  v/c, 
  after 
  the 
  lapse 
  of 
  l//c 
  

   seconds, 
  days 
  or 
  years. 
  

   v/c 
  log. 
  2q. 
  1q 
  in 
  cm. 
  . 
  5 
  in 
  cm. 
  

  

  

  

  005 
  

  

  01 
  

  

  05 
  

   10 
  

   15 
  

   20 
  

   25 
  

  

  30 
  

   35 
  

   40 
  

   45 
  

   50 
  

  

  55 
  

  

  60 
  

   65 
  

   70 
  

   75 
  

  

  80 
  

   85 
  

   90 
  

   95 
  

  

  + 
  00 
  

  

  59876 
  

   56143 
  

  

  44276 
  

   36664 
  

   30874 
  

   25825 
  

   21134 
  

  

  16606 
  

   12114 
  

   07563 
  

   02870 
  

   97949-10 
  

  

  92704 
  

   87018 
  

   80734 
  

   73634 
  

   65381 
  

  

  55431 
  

   42725 
  

  

  24972 
  

   94783 
  

  

  10 
  

  

  9697 
  

   6428 
  

  

  7718 
  

   3262 
  

   0358 
  

   8124 
  

   6268 
  

  

  4657 
  

   3217 
  

   3 
  902 
  

   0683 
  

   95387 
  

  

  84536 
  

   74161 
  

   64172 
  

   54493 
  

   45062 
  

  

  35835 
  

  

  26745 
  

   17771 
  

  

  08868 
  

  

  00 
  

  

  1160-9 
  

   1070-8 
  

  

  814-74 
  

   683-75 
  

   598-40 
  

   532-73 
  

   478*19 
  

  

  430-84 
  

   388-50 
  

   349-85 
  

   314-02 
  

  

  280-38 
  

  

  248-48 
  

   217-99 
  

   188-63 
  

   160-17 
  

   132-46 
  

  

  105-33 
  

   78-615 
  

   52-236 
  

   26-067 
  

  

  o- 
  

  

  7 
  m 
  cm 
  

  

  oo 
  

  

  22300 
  

  

  20464 
  

  

  15571 
  

   13067 
  

   11436 
  

   10181 
  

  

  9138 
  

  

  8233 
  

  

  7424 
  

  

  6001 
  

   5358 
  

  

  4748 
  

   4166 
  

   3604 
  

   3061 
  

   2531 
  

  

  2013 
  

  

  1502 
  

  

  998 
  

  

  498 
  

  

  

  

  Washington, 
  D. 
  0., 
  February, 
  1897 
  

  

  