﻿Proposed 
  International 
  Unit 
  of 
  Candle 
  Power. 
  2^^ 
  

  

  Table 
  D 
  contains 
  the 
  absolute 
  values 
  for 
  the 
  viscosity 
  of 
  

   water 
  at 
  5 
  degree 
  intervals 
  from 
  0° 
  C. 
  to 
  100° 
  C. 
  as 
  deter- 
  

   mined 
  from 
  the 
  whole 
  of 
  my 
  experiments 
  on 
  water. 
  The 
  

  

  Table 
  D. 
  

  

  — 
  Absolute 
  

  

  Viscosity 
  of 
  Water. 
  

  

  Temperature. 
  

  

  Absolute 
  

   Viscosity. 
  

   (Hosking) 
  

  

  Viscosity 
  

   (Computed), 
  

   (by 
  formula) 
  

  

  Thorpe 
  & 
  

   Eodger's 
  

   Values. 
  

  

  0° 
  C 
  

  

  •017928 
  

  

  •01522 
  

  

  •013105 
  

  

  •01142 
  

  

  •01006 
  

  

  •008926 
  

  

  •00800 
  

  

  •00724 
  

  

  •00657 
  

  

  •00600 
  

  

  •005500 
  

  

  •00508 
  

  

  •00169 
  

  

  •00436 
  

  

  •00406 
  

  

  •00380 
  

  

  •00356 
  

  

  •00335 
  

  

  •00316 
  

  

  •00300 
  

  

  •00284 
  

  

  •017928 
  {!) 
  

  

  •015218 
  

  

  •013107 
  

  

  •011422 
  

  

  •010055 
  

  

  •008926 
  {3) 
  

  

  •00801 
  

  

  •00723 
  

  

  •00657 
  

  

  •00600 
  

  

  •00550 
  {3) 
  

  

  •00508 
  

  

  •00470 
  

  

  •00436 
  

  

  •00406 
  

  

  •00380 
  (4) 
  

  

  •00356 
  

  

  •00336 
  

  

  •00317 
  

  

  •00300 
  

  

  •00284 
  

  

  

  01778 
  

   01512 
  

   01303 
  

   01138 
  

   01004 
  

   00893 
  

   00799 
  

   00721 
  

   00655 
  

   00597 
  

   00548 
  

   00506 
  

   00468 
  

   00436 
  

   00405 
  

   00379 
  

   00355 
  

   00334 
  

   00316 
  

   00299 
  

   00283 
  

  

  5 
  

  

  10 
  

  

  15 
  

  

  20 
  

  

  25 
  

  

  30 
  

  

  35 
  

  

  40 
  

  

  45 
  

  

  50 
  

  

  55 
  

  

  60 
  

  

  65 
  

  

  70 
  

  

  tsi 
  

  

  7o 
  

  

  80 
  

  

  85 
  

  

  90 
  

  

  95 
  

  

  100 
  

  

  

  

  

  values 
  computed 
  by 
  formulae 
  are 
  also 
  given, 
  as 
  well 
  as 
  Thorpe 
  

   and 
  Rodger's 
  values, 
  which 
  are 
  in 
  close 
  agreement 
  with 
  

   mine, 
  except 
  at 
  the 
  lowest 
  temperatures. 
  I 
  consider 
  that 
  my 
  

   values 
  are 
  correct 
  as 
  far 
  as 
  the 
  last 
  figure 
  given 
  in 
  each 
  

  

  case. 
  

  

  XXXIV. 
  Tlie 
  Proposed 
  International 
  Unit 
  of 
  Candle 
  Power, 
  

   By 
  Clifford 
  C. 
  Paterson 
  *. 
  

  

  (From 
  the 
  National 
  Physical 
  Laboratory.) 
  

  

  rpHE 
  intercomparison 
  of 
  light 
  units 
  between 
  the 
  National 
  

   i 
  or 
  other 
  standardizing 
  Laboratories 
  of 
  America, 
  France, 
  

   Germany, 
  and 
  Great 
  Britain 
  has 
  been 
  proceeding 
  at 
  intervals 
  

   since 
  1905. 
  

  

  The 
  values 
  which 
  have 
  been 
  obtained 
  for 
  the 
  ratiosbetween 
  

   the 
  different 
  units 
  are 
  now 
  found 
  to 
  be 
  in 
  sufficiently 
  close 
  

   accord 
  to 
  warrant 
  the 
  establishment 
  of 
  a 
  working 
  ^basis 
  of 
  

  

  * 
  Communicated 
  by 
  the 
  Physical 
  Society: 
  read 
  June 
  11. 
  1909, 
  

   T 
  2 
  

  

  