A dr’, 
10 mm 
+47 
+34 
+27 
+17 
r'mm 
loi > - T T T 
AU A n 20 30 
e QT 10 EX 
En NE. 
A A. 
-24 SX. x A 
NA x" 
-34 Nx €. NN: 
N s x 
to I * 
NS x 
-5-] N " s 
5 X. CT Nae 
: Ns Nx 
-8- 2 5 I 
x ss 
p Notts m. 
x. s 
-84 Scole X Xda nf Scale 
factor \ x Ont" / x factor 
-94 Imgge 4 —— — 60,1463 NX f ut Image 7 +++++ 60,0846 
- x x 
104 " 5----- 60,0608 A A aora À , " 8-.—. 60,0119 
ji "o Bee 60,1946 \ / v" 9+-+-+60,2228 
= \ ; 
-12-] N 7 
se 
-137 
  
Diagram 31. Radial distort 
ion curves of a microscope from 6 independent deter- 
minations. Enlargements 60 times. Standard error of unit weight of the image 
dr' 
107? mm 
— 040- 
— 0604 
— 0804 
— 1,004 
— 1,20 4 
— 1,404 
1,60 - 
  
coordinates about 0.05 mm. 
-7 ^ 
r'mm 
Diagram 32. Radial distortion curve of a microscope determined from reduction of 
a grid 60 times. Standard error of unit weight of the image coordinates about 1 
08 
micron.