﻿626 
  

  

  F. 
  W. 
  Very 
  — 
  Solar 
  Radiation. 
  

  

  Aqueous 
  vapor 
  between 
  7-5 
  mm 
  and 
  10*5 
  mm 
  , 
  or 
  about 
  9 
  mrr 
  . 
  

  

  

  Date. 
  

  

  No. 
  of 
  

   Obs. 
  

  

  Aq. 
  mm. 
  

  

  e 
  from 
  

  

  to 
  

  

  Mean 
  A. 
  

  

  At 
  mean 
  

   solar 
  

  

  

  

  

  

  

  

  distance. 
  

  

  1905 
  

  

  June 
  17 
  

  

  20 
  

  

  10-07 
  

  

  2*44 
  

  

  0-83 
  

  

  3*871 
  

  

  3-978 
  

  

  

  Aug. 
  14 
  

  

  14 
  

  

  9-92 
  

  

  2-83 
  

  

  1-00 
  

  

  4-017 
  

  

  4-099 
  

  

  

  " 
  18 
  

  

  12 
  

  

  7-51 
  

  

  2-35 
  

  

  0-99 
  

  

  3-476 
  

  

  3-540 
  

  

  

  " 
  21 
  

  

  12 
  

  

  9-88 
  

  

  2-24 
  

  

  1-00 
  

  

  3-655 
  

  

  3-718 
  

  

  

  « 
  24 
  

  

  13 
  

  

  7*64 
  

  

  3-24 
  

  

  1-01 
  

  

  3-503 
  

  

  3-558 
  

  

  

  " 
  25 
  

  

  27 
  

  

  j 
  10-49 
  ) 
  

   j 
  10-24 
  j 
  

  

  4-02 
  

  

  0-89 
  

  

  3-850 
  

  

  3-909 
  

  

  

  " 
  30 
  

  

  29 
  

  

  j 
  10-48 
  ) 
  

   ( 
  7-81 
  f 
  

  

  4-55 
  

  

  0-94 
  

  

  3-740 
  

  

  3-788 
  

  

  

  Sept. 
  19 
  

  

  20 
  

  

  •9*64 
  

  

  2-53 
  

  

  0-97 
  

  

  3-865 
  

  

  3-876 
  

  

  

  " 
  21 
  

  

  16 
  

  

  7-85 
  

  

  2-82 
  

  

  0-97 
  

  

  3-668 
  

  

  3-673 
  

  

  

  " 
  26 
  

  

  10 
  

  

  7-57 
  

  

  2-17 
  

  

  1-01 
  

  

  3*608 
  

  

  3-603 
  

  

  

  Oct. 
  3 
  

  

  10 
  

  

  8-98 
  

  

  2-38 
  

  

  1-04 
  

  

  3-900 
  

  

  3-879 
  

  

  1906 
  

  

  June 
  12 
  

  

  28 
  

  

  10-02 
  

  

  2-98 
  

  

  0-88 
  

  

  3-918 
  

  

  4-024 
  

  

  

  July 
  6 
  

  

  16 
  

  

  8-69 
  

  

  2-72 
  

  

  0-87 
  

  

  3-496 
  

  

  3-596 
  

  

  

  " 
  10 
  

  

  20 
  

  

  8-50 
  

  

  2-52 
  

  

  0-88 
  

  

  3-365 
  

  

  3-461 
  

  

  

  " 
  11 
  

  

  16 
  

  

  7-71 
  

  

  2-67 
  

  

  0-89 
  

  

  3*290 
  

  

  3-384 
  

  

  

  c 
  1 
  / 
  ? 
  

  

  16 
  

  

  6-67 
  

  

  3-15 
  

  

  0-94 
  

  

  3-501 
  

  

  3-598 
  

  

  

  " 
  21 
  

  

  12 
  

  

  8-54 
  

  

  2-47 
  

  

  0-94 
  

  

  3-414 
  

  

  3-505 
  

  

  

  « 
  24 
  

  

  8 
  

  

  10-02 
  

  

  2-74 
  

  

  1-34 
  

  

  3-561 
  

  

  3-656 
  

  

  

  " 
  27 
  

  

  18 
  

  

  7-86 
  

  

  2-53 
  

  

  0-94 
  

  

  3*537 
  

  

  3-628 
  

  

  

  Aug. 
  14 
  

  

  15 
  

  

  8*51 
  

  

  2-65 
  

  

  0-92 
  

  

  3-522 
  

  

  3-593 
  

  

  

  " 
  17 
  

  

  8 
  

  

  9-50 
  

  

  2-73 
  

  

  1-35 
  

  

  3-741 
  

  

  3-812 
  

  

  

  Sept. 
  8 
  

  

  6 
  

  

  9-11 
  

  

  3-12 
  

  

  2-11 
  

  

  4-209 
  

  

  4-245 
  

  

  

  9 
  

  

  16 
  

  

  8-31 
  

  

  3-83 
  

  

  0-93 
  

  

  3-950 
  

  

  3-982 
  

  

  

  Mean 
  

  

  Aq.= 
  

  

  8-861 
  

  

  

  Mean 
  

  

  A=r 
  

  

  3-744 
  

  

  The 
  values 
  of 
  A 
  obtained 
  by 
  the 
  first 
  chart 
  increase 
  with 
  the 
  

   aqueous 
  vapor. 
  They 
  should 
  be 
  constant, 
  and 
  fig. 
  2 
  has 
  been 
  

   used 
  to 
  give 
  a 
  corrected 
  chart, 
  shown 
  by 
  the 
  dotted 
  lines 
  

   in 
  fig. 
  1, 
  with 
  the 
  following 
  multiplying 
  factors 
  appropriate 
  

   to 
  conditions 
  on 
  the 
  mountain 
  : 
  

  

  Air-Mass. 
  

  

  Aq. 
  = 
  l-5 
  mm 
  . 
  

  

  Aq. 
  = 
  3 
  mm 
  . 
  

  

  Aq. 
  = 
  6 
  mm 
  . 
  

  

  Aq.:=9 
  mm 
  . 
  

  

  Aq. 
  = 
  15 
  mm 
  . 
  

  

  4 
  

  

  2-90 
  

  

  3-05 
  

  

  3-15 
  

  

  3-20 
  

  

  3-25 
  

  

  3 
  

  

  2-64 
  

  

  2-75 
  

  

  2-85 
  

  

  2-90 
  

  

  2-95 
  

  

  2 
  

  

  2-35 
  

  

  2-45 
  

  

  2-53 
  

  

  2*57 
  

  

  2-63 
  

  

  1 
  

  

  2-05 
  

  

  2*15 
  

  

  2-20 
  

  

  2-25 
  

  

  2-30 
  

  

  0-5 
  

  

  1-70 
  

  

  1-75 
  

  

  1-77 
  

  

  1-80 
  

  

  1-85 
  

  

  