FOR DETERMINING THE MEAN DENSITY OF THE EARTH. 
321 
Third Series. Pendulum 1821 above. 
No. of 
Number of 
Coincidences. 
Number of 
Mean 
Arc of Vibration. 
Mean of 
Thermo- 
Mean of 
Barometer 
Corrected 
Log. Rates of 
Swing. 
Intervals. 
Interval. 
meter 
Readings. 
Pendulum on 
Shelton. 
Beginning. 
End. 
Beginning. 
End. 
Readings. 
53 
3 
3 
19 
s 
489-000 
1*99 
0*71 
53*05 
in. 
29*916 
9*99828152 
54 
3 
3 
23 
488*775 
2*00 
0*60 
53*30 
29*811 
8078 
55 
3 
0 
*J 
24 
488*805 
1*91 
0*53 
53*59 
29*721 
8100 
56 
3 
3 
26 
489*397 
1*76 
0*46 
53*51 
29*638 
8244 
57 
3 
3 
21 
489*222 
1*91 
0*62 
53*39 
29*556 
8204 
58 
3 
3 
25 
489*480 
2*00 
0*53 
52*84 
29*542 
8I75 
59 
3 
3 
22 
489*311 
1*81 
0*60 
52*75 
29*529 
8080 
60 
3 
3 
23 
488*848 
1*98 
0*59 
53*18 
29*499 
8020 
61 
3 
3 
23 
488*717 
2*05 
0*65 
52*99 
29*454 
7954 
62 
3 
3 
22 
489*038 
1*72 
0*60 
53*26 
29*493 
8063 
63 
3 
3 
22 
489*303 
1*94 
0*59 
53*10 
29*544 
8I71 
64 
3 
3 
27 
489*568 
2*00 
0*48 
52*75 
29*599 
8186 
65 
3 
3 
22 
489*409 
1*97 
0*67 
52*73 
29*633 
8172 
66 
3 
3 
25 
489*553 
2*03 
0*58 
52*59 
29*649 
8188 
67 
3 
3 
25 
489*826 
1*81 
0*54 
51*85 
29*662 
8O9O 
Fourth Series. Pendulum 8 above. 
68 
5 
5 
29 
375*879 
2*00 
0*61 
51*53 
29*662 
9*99774063 
69 
5 
5 
29 
376*117 
1*81 
0*58 
51*25 
29*608 
4102 
70 
5 
5 
29 
375*855 
1*80 
0*60 
51*65 
29*481 
4004 
71 
5 
5 
29 
375*517 
1*88 
0*63 
52*11 
29*333 
3885 
72 
5 
5 
28 
375*804 
1*74 
0*57 
53*28 
29*279 
4258 
73 
5 
5 
29 
375*700 
1*71 
0*56 
53*28 
29*250 
4179 
74 
3 
3 
34 
375*480 
1*87 
0*53 
53*03 
29*245 
4010 
75 
5 
5 
26 
375*208 
1*75 
0*68 
53*43 
29*250 
3938 
76 
5 
5 
28 
374*893 
2*02 
0*74 
53*46 
29*294 
3824 
77 
4 
4 
32 
374*953 
1*91 
0*59 
53*39 
29*381 
3802 
78 
5 
5 
26 
375*273 
1*90 
0*74 
52*95 
29*447 
3956 
79 
5 
5 
28 
375*332 
1*98 
0*72 
52*65 
29*502 
3950 
80 
4 
4 
33 
375*493 
1*91 
0*50 
52*56 
29*561 
3976 
81 
5 
5 
28 
375*236 
1*92 
0*68 
53*66 
29*559 
4089 
82 
5 
5 
30 
375*213 
1*85 
0*59 
54*08 
29*538 
4122 
Section V. — Abstract of the Pendulum Observations at the Lower Station. 
37 . No correction was applied to the immediate readings of the instruments, except 
that the Barometer-reading was increased by 0*" ‘016, which was required to make its 
indications correspond to those of the upper Barometer. 
2 u 
MDCCCLVI 
