Measurements in diapositives made from the same negative.
Root mean square values of the residuals, microns.
Table 2.
Radius
mm
Camera
Ag 38
Ag 41
Ag 38
+
Ag 41
Date
29/6
19/7
12/8
1/9
29/6
19/7
1/9
o
3.3
2. 1
0.8
1.6
2.6
1.8
3.0
2.4
50.0
2.3
2.8
1.3
1.3
1.3
2. 1
2.5
2.0
70.7
1.6
1.7
1. 1
1.8
1.5
3.2
2.4
2.0
100.0
4. 1
2.3
3.0
2.5
2.7
2.8
2. 1
2.9
111.8
4.4
3.4
2.3
3.2
3. 0
2.7
1.9
3. 1
141.4
6.5
2.6
3.3
5.0
3.9
3. 6
5. 7
4. 6
Radius
mm
Camera
Ag
196
Ag 196
. Ag 38+ Ag 4 1
+ Ag 196
Date
29/6
19/7
12/8
1/9
0
2.0
2.8
2.3
2.6
2.4
2.4
50.0
1.7
3.0
2.8
3. 1
2. 7
2.3
70.7
3.0
2.4
3.7
3.4
3.2
2.5
100.0
2.3
3.0
4. 8
4. 5
3.8
3.2
111.8
5.0
5.0
6.4
4. 8
5.3
4.0
141.4
7.5
6.3 >
9.9
8.4
8. 1
6. 2
between two diapositives. In order to get the standard error of unit
weight in one diapositive we have to divide by \J2. As a mean value
of the standard error of unit weight in one diapositive we find about
2.5 microns, which evidently indicates the highest possible accuracy
to be expected.
The diapositives from the camera Ag 196 show standard errors of
unit weight which are significantly larger than those from the other
two cameras. This probably depends on the lower quality of the film.
Other investigations at the Oland test area do not indicate that the
camera Ag 196 should be of lower quality than the cameras Ag 38
and Ag 41.
The individual residuals of the different points were calculated
by the differential formulas and the root mean square values of the
455