Measurements in diapositives made from the same négative. 
Reference copy made June 29, 1963. 
Table I. 
Camera 
Date of 
copying 
Parame 
ters 
dm 10^ 
X 
dm 10^ 
y 
dm 10 ^ 
d« cc 
dp cc 
s o 
micr. 
29/6 
I 
+405.2 
+401.6 
- 14.0 
+ 19. 1 
4.4 
» 
2 
•+403.4 
- 4.5 
4.5 
19/7 
I 
+394.8 
+408.0 
+ 16.8 
+ 4. 1 
3.7 
Ag 38 
" 
2 
+401.4 
+ 18.8 
3. 7 
12/8 
I 
+645.6 
+642.8 
- 52.2 
- 9.7 
3. 1 
" 
2 
+644.2 
- 57.0 
3. 1 
1/9 
I 
+717.2 
+744.4 
- 4. 1 
-22.7 
3.4 
" 
2 
+730.8 
- 15.4 
3.7 
29/6 
I 
-505.2 
-485.2 
+ 31.1 
+ 16.8 
3.5 
" 
2 
-495.2 
+ 39.5 
3.6 
Ag 41 
19/7 
I 
+512.0 
+484.8 
- 61.6 
+ 6.6 
3. 0 
" 
2 
+498.2 
- 58.3 
3.2 
1/9 
I 
+716.0 
+724.0 
+ 12.2 
+ 35. 1 
3. 3 
" 
2 
+720.0 
+ 29.8 
3.8 
29/6 
I 
- 32.4 
- 25.6 
+135.0 
- 8.9 
4.8 
" 
2 
- 29.0 
+130.5 
4. 7 
19/7 
I 
+387.6 
+373.6 
-199.6 
-24.4 
4. 8 
" 
2 
+380.6 
-211.9 
4.9 
Ag 196 
12/8 
I 
+734.8 
+752.4 
+ 61.4 
+ 18. 6 
6. 4 
" 
2 
+743.6 
+ 70.7 
6.4 
1/9 
I 
+707.6 
+701.2 
+ 78.4 
0 
5.4 
", 
2 
+704.4 
+ 78.4 
5.2 
1. Two translations, two scale changes, one rotation and lacking 
orthogonality: dx 0 , dy 0 , dm x , dm y , da and d/3, respectively. 
2. Two translations, one scale change and one rotation: dx 0 , dy 0 , 
:1m and da. 
The results of the computations are shown in table I. From the table 
is evident that the scale change is important and that the variation in 
d/3 amounts to about 40 cc . Evidently the scale change is rather uniform 
and the large affinity which is usually found in the photographs 
is caused by the developing procedure. It is of great interest 
to see that the changes in the film occur very rapidly and that the dia 
positives made on the same occasion as the reference copies show 
systematic errors of the same magnitude as the others. 
The figures in the table are obtained from coordinate differences 
454