﻿130 
  ANNUAL 
  REPORT 
  SMITHSONIAN 
  INSTITUTION, 
  1943 
  

  

  le 
  

  

  2100 
  

  

  43* 
  N. 
  LATITUDE 
  

   3.0mm. 
  OZONE 
  

  

  3000 
  3100 
  

  

  WAVELENGTH 
  IN 
  ANGSTROMS 
  

  

  3200 
  

  

  Figure 
  22. 
  — 
  Product 
  curves 
  of 
  solar 
  spectral 
  energy 
  by 
  erythema 
  efficiency. 
  (3.0 
  

   mm. 
  ozone 
  in 
  zenith 
  atmosphere. 
  ) 
  

  

  Figtjee 
  23. 
  — 
  Variation 
  of 
  solar 
  erythema 
  effect 
  with 
  air 
  mass. 
  (3.0 
  mm. 
  ozone 
  in 
  

  

  zenith 
  atmosphere.) 
  

  

  