Full text: Commissions III and IV (Part 5) 

  
  
  
  
  
113 
Y km 
A 
oo 
EE Y 
rN Eee EN EE n3 
  
  
of refraction and curvature. 
Errors (in meters) of the elevations on the ground due to the direct in- 
fluence 
  
  
  
  
Diagram 40.
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