experiments made with an invariable pendulum, 
65 
Observations of Coincidences at Greenwich — continued. 
Height above the level of the sea 181,5 f eet - 
A . M. November 8th, 1825, Royal Observatory. ^ r Beg*. 29.251 mer. 39*5 . 1 = 29.200 mean cor. to 
Clock losing at a mean rate i s .87 per diem. ’ \ End*. .163 — 42°.o. 3 temp, of pend. 
Temp. 
Time of 
Disappear- 
ance. 
Time of 
Re-appear- 
ance. 
Mean of Dis- 
appearance 
and Re-ap- 
pearance. 
Arc of 
vibra- 
tion. 
Mean 
Arc. 
Interval in seconds 
of Clock. 
Observed vibrations in 24 h. 
Correct, 
for Arc. 
Vibra. in 24 h. cor. for Arc. 
Disappearance. 
Mean of Disap. 
and Re-ap. 
Disappearance 
Mean of Disap. 
and Re-ap. 
Disap. 
Disap. & 
Re-ap. 
0 
40.0 
40.2 
40,6 
40,9 
41.0 
4 *>o 
41.2 
4*.9 
42.1 
42,1 
h. m. s. 
3 27 28 
39 20 
51 12 
4 3 6 
H 59 
26 53 
38 46 
50 40 
5 2 33 
14 28 
m. s. 
27 33 
39 25 
51 19 
3 13 
*5 7 
27 1 
38 57 
50 51 
2 45 
H 39 
m. s. 
27 3°.5 
39 22,5 
5 * * 5.5 
3 9.5 
*5 3 
26 57 
38 51,5 
5 ° 45.5 
2 39 
*4 33.5 
0 
1. 18 
I.09 
1.02 
O.95 
0.88 
0.82 
0.75 
0.70 
0.65 
0.61 
0 
*■*35 
1.055 
0.985 
0 - 9*5 
0.850 
0.785 
0.725 
0.675 
0.630 
s. 
7 12 
712 
7*4 
713 
714 
7*3 
714 
7*3 
7*5 
s. 
712 
7*3 
7*4 
7 * 3.5 
7*4 
7 * 4.5 
7*4 
7 * 3.5 
7 * 4.5 
vib. 
42.106 
1.820 
I.587 
I.368 
i . 1 8 1 
1.009 
0.857 
0.744 
0.649 


4 *.i 
Means. 
7 * 3.333 
713,667 
86155,892 
86156,005 
1.258 
86157,150 
86157,263 
P. M. November 8th, 1825, Royal Observatory. 
5 Be g s - 29.104 mer. 4 2°.8. } 
~ 29.058 mean cor. to 
Clock losing at a mean rate i 9 .87 per diem. 
’ | End*. 
.029 — 45 0 . 5 
temp, of pend. 
43 ’ 1 
6 26 34 
26 40 
26 37 
1. 14 
1.095 
710 
709 
1.961 
43 » 2 
38 24 
38 28 
38 26 
1.05 
1.015 
708 
709,5 
1.684 
43 ’ 2 
50 12 
50 19 
5 ° * 5.5 
0.98 
0.945 
710 
711 
1.461 
43,7 
722 
2 11 
2 6,5 
0.91 
0.880 
710 
710 
1.266 
44)0 
* 3 S 2 
14 1 
*3 56.5 
0.85 
0.825 
710 
7 ° 9)5 
1. hi 
44.2 
25 42 
25 50 
25 46 
0.80 
0-775 
710 
7 * 0,5 
0.981 
44.5 
37 32 
37 4 i 
37 36,5 
0.75 
0-725 
708 
709 
0.858 
44.8 
49 20 
49 3 * 
49 25.5 
0.70 
0.675 
712 
7 ** 
0.745 
45.0 
8 112 
1 21 
1 16,5 
0.65 
0.625 
708 
709 
0.638 
45.5 
13 00 
13 11 
*3 5.5 
0.60 
44.12 
Means. 
709,556 
709.833 
86154,603 
86154,698 
1.189 
86155,792 
86155,887 
* K 
MDCCCXXVI 
