halves. 
theore- 
of the 
  
ese the 
iat the 
ly the 
ice of 
n this 
these 
ortun- 
plates 
second 
ch the 
  
measured distances were reduced by multiplying them by the scale factor. The 
following results were obtained: 
Maximum displacement in X 
Maximum displacement in Y 
Maximum displacement in position 
Mean square error in X 
Mean square error in Y 
Mean square error in position 
  
  
THEORETICAL GRID 
ACTUAL GRID 
SCALE FOR GRID 
SCALE FOR DISPLACEMENTS 
FIGURE Il! — DISPLACEMENTS ON PLATE 8 
In Figure III, the actual positions of the grid intersections (before any scale 
change) are compared with their theoretical positions. The scale difference is 
0— — — —o 
—— d 
Lt 20 MILLIMETERS 
tits 3 MICRONS 
microns 
microns 
microns 
microns 
microns 
microns 
  
BEFORE SCALE CORRECTION. 
3