48 
Histogram and normal distribution curve 
ot the residuals after adjustment in seven points 
Autograph A7-310 
Right projector base: out 
Operator 1 
September 1963 
Numbir of residuals 
s - 2,8 microns 
Fig. 2.2:8. Normal distribution hypothesis is accepted. 
7. 4 <r chi = 12. 8. 
o 
Radial Distortion 
Autograph A8-1427 
Left projector 
Ba s e = 80 mm 
October 1963 
dr' microns 
Standard error of unit weight 
So = 2,9 2,7 2,4 2,2 5,5 1,8 3,8 - microns 
Fig. 2.2:9. Radial distortion effects and standard errors q£ unit weight.