﻿Smithsonian 
  Report. 
  1929. 
  — 
  Scares 
  

  

  Plate 
  3 
  

  

  1. 
  Messier 
  lOl 
  in 
  Ursa 
  Major 
  

  

  2. 
  Messier 
  33 
  in 
  Triangulum 
  

  

  Examples 
  of 
  spiral 
  nebulae 
  seen 
  broadside; 
  photographed 
  with 
  the 
  60-inch 
  reflector. 
  Both 
  nebulae 
  are 
  

   well 
  resolved 
  into 
  stars 
  and 
  show 
  dark 
  clouds 
  of 
  obscuring 
  material 
  intermingled 
  with 
  the 
  stars 
  and 
  with 
  

   clouds 
  of 
  luminous 
  nebulosity. 
  

  

  