FOR DETERMINING THE MEAN DENSITY OF THE EARTH. 
319 
Thermo- 
meter. 
Correction to 
Log. Rate. 
Thermo- 
meter. 
Correction to 
Log. Rate. 
50-0 
0-00000000 
66*0 
0-00002063 
•5 
103 
•5 
2166 
51-0 
207 
61-0 
2269 
•5 
310 
•5 
2372 
52-0 
413 
62-0 
2475 
•5 
516 
•5 
2578 
53-0 
619 
63-0 
2681 
•5 
722 
•5 
2784 
54-0 
825 
64-0 
2887 
•5 
928 
•5 
2990 
55-0 
1032 
65-0 
3094 
•5 
1135 
•5 
3197 
56-0 
1238 
66-0 
3300 
•5 
1341 
•5 
3403 
A7-0 
1444 
67-0 
3506 
•5 
1547 
•5 
3609 
58-0 
1650 
68-0 
3712 
•5 
1753 
•5 
3815 
59-0 
1856 
69-0 
3918 
•5 
I960 
•5 
4022 
60-0 
2063 
70-0 
4125 
Barometer. 
Correction to 
Log. Rate. 
iu. 
29-0 
0-00005061 
-2 
5096 
-4 
5131 
-6 
5166 
•8 
5201 
30-0 
5236 
•2 
5271 
-4 
5306 
-6 
5340 
•8 
5375 
31-0 
5410 
-2 
5445 
-4 
5480 
-6 
5514 
-8 
5549 
32-0 
5584 
The ‘‘Corrected Log. Rate of Pendulum upon Clock,” or Log. Rate supposing that 
the temperature of the Pendulum is 50°, and that it vibrates in vacuum, in an inde- 
^ ^ mmm ^ 
finitely small arc, is found by adding together the logarithm of the correction 
for arc, the correction for thermometer, and the correction for barometer, all taken 
from the tables above. 
Section IV . — Abstract of the Pendulum Observations at the Upper Station. 
36. The remarks in the preceding Sections explain all the essential points in the 
following Table. It is only necessary to add, that the temperature of the Barometer 
(which was suspended in the Anteroom, very near to the Stove) was higher than that 
of the Pendulum ; and a small correction, never exceeding — 0'075, has been applied 
to its reading. 
