﻿624 
  

  

  F. 
  W. 
  Very 
  — 
  Solar 
  Radiation. 
  

  

  upper 
  air 
  in 
  this 
  respect 
  are 
  sometimes 
  great 
  enough 
  to 
  upset 
  

   all 
  calculations. 
  

  

  In 
  attempting 
  to 
  use 
  the* 
  chart 
  (founded 
  on 
  observations 
  at 
  

   or 
  near 
  sea 
  level) 
  in 
  the 
  reduction 
  of 
  the 
  Mt. 
  Wilson 
  measure- 
  

   ments 
  of 
  solar 
  radiation 
  in 
  the 
  same 
  volume 
  of 
  the 
  Annals,* 
  it 
  

   was 
  evident 
  that 
  different 
  curves 
  are 
  required. 
  Having 
  no 
  

   observations 
  suitable 
  for 
  the 
  construction 
  of 
  a 
  new 
  chart 
  of 
  the 
  

   same 
  extent 
  as 
  fig. 
  1 
  and 
  adapted 
  to 
  mountain 
  conditions, 
  I 
  

   first 
  employed 
  the 
  present 
  chart 
  (full 
  lines) 
  to 
  get 
  a 
  preliminary 
  

   reduction. 
  The 
  vapor 
  readings 
  on 
  the 
  mountain 
  are 
  multiplied 
  

   by 
  0*887, 
  according 
  to 
  Harm's* 
  prescription, 
  to 
  get 
  the 
  vapor 
  in 
  

  

  Aqueous 
  vapor 
  between 
  4"5 
  mm 
  and 
  7'5 
  mm 
  , 
  or 
  about 
  6 
  n 
  

  

  

  Date. 
  

  

  No. 
  of 
  

   Obs. 
  

  

  Aq. 
  mm. 
  

  

  e 
  from 
  

  

  to 
  

  

  Mean 
  A. 
  

  

  At 
  mean 
  

   solar 
  

  

  

  

  

  

  

  

  distance. 
  

  

  1905 
  

  

  June 
  7 
  

  

  14 
  

  

  7-17 
  

  

  3*59 
  

  

  0-83 
  

  

  3-614 
  

  

  3-707 
  

  

  

  " 
  13 
  

  

  14 
  

  

  5*36 
  

  

  1*96 
  

  

  0-90 
  

  

  3-369 
  

  

  3-460 
  

  

  

  " 
  26 
  

  

  12 
  

  

  5-83 
  

  

  1-72 
  

  

  0-97 
  

  

  3-373 
  

  

  3-469 
  

  

  

  " 
  28 
  

  

  14 
  

  

  5-63 
  

  

  2-32 
  

  

  0-84 
  

  

  3-426 
  

  

  3-524 
  

  

  

  July 
  6 
  

  

  12 
  

  

  5-14 
  

  

  1-77 
  

  

  0-99 
  

  

  3-262 
  

  

  3-356 
  

  

  

  " 
  11 
  

  

  12 
  

  

  5-67 
  

  

  1-76 
  

  

  0-89 
  

  

  3-239 
  

  

  3-332 
  

  

  

  " 
  12 
  

  

  14 
  

  

  6-66 
  

  

  2-70 
  

  

  0-88 
  

  

  3-449 
  

  

  3-546 
  

  

  

  " 
  22 
  

  

  8 
  

  

  7-42 
  

  

  3-58 
  

  

  1-72 
  

  

  4-112 
  

  

  4-223 
  

  

  

  " 
  25 
  

  

  27 
  

  

  1 
  5*53 
  f 
  

  

  2-27 
  

  

  0-84 
  

  

  3*237 
  

  

  3-322 
  

  

  

  " 
  28 
  

  

  16 
  

  

  6-02 
  

  

  2-33 
  

  

  0-89 
  

  

  3-366 
  

  

  3-452 
  

  

  

  " 
  31 
  

  

  18 
  

  

  4-64 
  

  

  2*51 
  

  

  0*92 
  

  

  3-376 
  

  

  3-459 
  

  

  

  Aug. 
  3 
  

  

  17 
  

  

  5-63 
  

  

  2'33 
  

  

  0-92 
  

  

  3-428 
  

  

  3-510 
  

  

  

  " 
  29 
  

  

  ]2 
  

  

  6-63 
  

  

  3'42 
  

  

  1-08 
  

  

  3-504 
  

  

  3-551 
  

  

  

  Sept. 
  5 
  

  

  12 
  

  

  5-38 
  

  

  3*13 
  

  

  1-03 
  

  

  3-306 
  

  

  3-339 
  

  

  

  8 
  

  

  28 
  

  

  ( 
  8-13 
  ) 
  

   ( 
  4-62 
  \ 
  

  

  2-80 
  

  

  0-93 
  

  

  3-280 
  

  

  3-308 
  

  

  

  " 
  11 
  

  

  12 
  

  

  6-06 
  

  

  3-07 
  

  

  1-12 
  

  

  3-518 
  

  

  3-542 
  

  

  

  " 
  13 
  

  

  10 
  

  

  6-06 
  

  

  2-65 
  

  

  1-16 
  

  

  3-364 
  

  

  3-384 
  

  

  

  " 
  14 
  

  

  12 
  

  

  5-74 
  

  

  2*38 
  

  

  0*95 
  

  

  3-353 
  

  

  3-370 
  

  

  

  " 
  15 
  

  

  12 
  

  

  4-76 
  

  

  3'29 
  

  

  1-08 
  

  

  3-528 
  

  

  3-545 
  

  

  

  " 
  27 
  

  

  24 
  

  

  5*65 
  

  

  2-90 
  

  

  1-00 
  

  

  3-608 
  

  

  3-600 
  

  

  

  Oct. 
  24 
  

  

  12 
  

  

  5-69 
  

  

  293 
  

  

  1-17 
  

  

  3-634 
  

  

  3-572 
  

  

  1906 
  

  

  May 
  18 
  

  

  11 
  

  

  6*60 
  

  

  2-11 
  

  

  0-98 
  

  

  3-362 
  

  

  3-428 
  

  

  

  " 
  19 
  

  

  14 
  

  

  4-84 
  

  

  1-87 
  

  

  0-86 
  

  

  3-140 
  

  

  3-202 
  

  

  

  June 
  6 
  

  

  20 
  

  

  4*68 
  

  

  3*12 
  

  

  0-90 
  

  

  3-260 
  

  

  3-345 
  

  

  

  " 
  9 
  

  

  22 
  

  

  5-77 
  

  

  3-04 
  

  

  0-85 
  

  

  3-317 
  

  

  3-404 
  

  

  

  " 
  15 
  

  

  24 
  

  

  7-46 
  

  

  2-63 
  

  

  0-83 
  

  

  3-558 
  

  

  3*656 
  

  

  

  Mean 
  

  

  Aq.= 
  

  

  5-942 
  

  

  

  Mean 
  

  

  A 
  = 
  

  

  3-485 
  

  

  * 
  Op. 
  oit., 
  Table 
  13, 
  pages 
  87 
  to 
  92. 
  

  

  