449 
Table 4. Percentage points of t-distribution. 
Level 
per cent 
t-values 
x-obliquity 
width- 
error 
The signi 
ficance 
before the 
adjustment 
after the 
adjustment 
before the 
adjustment 
after the 
adjustment 
100.0—50.0 
0.00—0.70 
4 
9 
2 
7 
not signi- 
ficant 
50.0—33.3 
0.70—1.02 
2 
1 
3 
f9 
33.3—20.0 
1.02—1.37 
2 
20.0—10.0 
1.37—1.81 
2 
1 
1 
1 
10.0— 5.0 
1.81—2.23 
1 
1 
yy 
5.0— 1.0 
2.23—3.17 
2 
1 
5 
almost signi- 
ficant 
1.0— 0.1 
3.17—4.59 
significant 
0.1— 
4.59— 
1 
5 
highly signi- 
ficant 
V 
14 
12 
14 
12 
Table 5. L^ft projector. 
date 
s'o 
dt 
s dt 
dt 
“ =^, 
dl 
s dl 
dl 
fe = T~ 
s dl 
17. 5.61 
5.8 
M nl 
- 4.4 
am 
10 3 
— 0.43 
— 6.9 
10.2 
— 0.68 
2.10.61 
5.5 
— 4.4 
98 
- 0.45 
4- 12.2 
9.7 
4- 1.26 
4.10.61 
8.2 
— 4.9 
5.7 
— 0.86 
4- 5.7 
5.6 
4- 1.02 
6.11.61 
8.5 
— 6.1 
6.2 
- 0.98 
— 8.5 
6.2 
— 1.37 
17.11.61 
4.5 
1.9 
8.0 
— 0.24 
+ 0.8 
7.9 
+ 0.10 
8. 1.62 
4.1 
— 7.3 
7.3 
— 1.00 
— 1.5 
7.2 
— 0.21 
6. 3.62 
4.2 
— 16.4 
7.5 
- 2.19 
— 2.1 
7.4 
- 0.28 
6. 3.62 
3.8 
4- 2.4 
6.8 
4- 0.35 
4- 6.5 
6.7 
+ 0.97 
13. 4.62 
1.7 
+ 2.0 
3.0 
4- 0.67 
4- 3.4 
30 
4- 1.13 
23. 2.63 
4.1 
— 0.4 
7.3 
— 0.05 
— 8.1 
7.2 
— 1.13 
30. 3.63 
3.6 
- 11.1 
6.4 
— 1.73 
- 13.2 
6.3 
— 2.10 
26. 6.63 
3.9 
- 3.3 
6.9 
— 0.48 
— 4.4 
6.9 
— 0.64 
2. 9.63 
3.8 
- 9.0 
6.8 
— 1.32 
4- 5.8 
6.7 
4- 0.87 
25.11.63 
4.1 
— 2.5 
7.3 
— 0.34 
4- 19.4 
7.2 
+ 2.69 
The projector has been adjusted 6.3.62. 
The autograph has been adjusted once during 2.5 years, which indi 
cates that control measurements may be made very seldom. 1 wice a 
year can be considered quite satisfactory on account of the performed 
investigation. The root mean square value of all the standard errors 
of unit weight is 4.1 gm in the left projector and 4.5 gm in the right 
projector. The standard errors of unit weight have been even with one 
exception.