﻿Smithsonian 
  Report. 
  1929. 
  — 
  Scares 
  

  

  Plate 
  1 
  

  

  Photographs 
  with 
  Increasing 
  length 
  of 
  Exposure 
  of 
  a 
  small 
  Field 
  

  

  ABOUT 
  V 
  Aurigae 
  

  

  Illustrating 
  the 
  rapid 
  increase 
  in 
  numbers 
  of 
  stars 
  with 
  decreasing 
  brightness. 
  The 
  faintest 
  stars 
  

   shown 
  are 
  approximately 
  of 
  the 
  twelfth, 
  fifteenth, 
  eighteenth, 
  and 
  twentieth 
  magnitude. 
  

  

  