experiments made with an invariable pendulum. 
25 
Observation of Coincidences at Port Bowen, June 1825 ( 1st Series.) 
Night, Tune 14th, 1825, Port Bowen. ( Temp. to 0 .;. ^ f Begs. 29.850 temp, of mer. 45 0 \ = 29.918 mean 
. . . . /■ . qq ^ | Dew P . 56°. Ends. 29.850 45 ° j cor. to temp, pend 
Clock gaining at a mean rate 69". 88. 3 ^ y 3 ‘t-jj ri 
Temp. 
5°’5 
S« 
;o,83 
0,83 
Time of 
Disappear- 
ance. 
Time of 
Re-appear- 
ance. 
Mean of Dis- 
appearance 
and Re-ap- 
pearance. 
Arc of 
vibra- 
tion. 
h. ID. s. 
in. s. 
m. s. 
O 
9 46 26 
46 30 
46 28 
1 • 17 
57 59 
58 9 
58 4 
I .08 
10 9 33 
9 45 
9 39 
I. OO 
21 17 
21 23 
21 20 
O .92 
3 2 55 
33 3 
32 59 
0.86 
44 33 
44 42 
44 37’5 
0.80 
56 12 
56 21 
56 16,5 
0.74 
11 7 50 
8 1 
7 55 >5 
0.69 
19 28 
19 41 
19 34’5 
0.65 
3i 7 
31 21 
3i H 
0.59 
Mean 
Interval in se- 
conds of Clock. 
Observed vibrations in 24 h. 
Correct, 
for Arc. 
Vibra. in 24 h. cor. for Arc. 
Arc. 
Disap. 
Disap. & 
Re-ap. 
Disappearance. 
MeanofDisap. 
and Re-ap. 
Disappearance. 
MeanofDisap. 
and Re-ap. 
O 
I. 125 
s. 
693 
696 
86220,328 
86221,403 
vib. 
2.069 
86222,397 
86223,472 
I.040 
694 
695 
86220,687 
86221,046 
1. 768 
86222,455 
86222,8 14 
0.960 
704 
701 
86224,227 
86223,176 
I.507 
86225,734 
86224,683 
0.890 
698 
699 
86222,1 16 
86222,470 
I.295 
86223,41 I 
86223,765 
0 830 
698 
698,5 
86222,1 16 
86222,293 
1. 122 
86223,238 
86223,415 
0.770 
699 
699 
86222,470 
86222,470 
O.969 
86223,439 
86223,439 
0.715 
698 
699 
86222,1 16 
86222,470 
O.836 
86222,952 
86223,306 
0.670 
698 
699 
86222,1 16 
86222,470 
0734 
86222,850 
86223,204 
0.620 
699 
699,5 
86222,470 
86222,647 
O.628 
86223,098 
86223,275 
Mean. 
Diff. to 50°. 
Correction for Temp. o®.83. 
Vibra.. in 24 b. at Temp. 50°. 
86223,286 
+ 0,351 
86223,637 
86223,48 6 
+ o .35 5 
86223,837 
Morning, June 15th, 1825, Port Bowen. 
Clock gaining at a mean rate 69 s . 8 8. 
Hyg r . 
( Temp. 49°, o. 
I Dew P l . 35°. 
r> r ( Begs. 29,850 mer. 45° } r : 29,922 mean cor. 
ar Ends. 29,859 — 4>°j to temp, of pend. 
50,5 
49 > 1 
4-7 
40 54 
52 3 o 
4 8 
15 46 
27 27 
39 7 
5 o 47 
2 27 
14 14 
25 58 
40 58 
52 36 
4 
15 
27 
39 
H 
53 
35 
16 
5° 58 
2 41 
14 25 
26 9 
40 56 
52 33 
4 ii 
15 49>5 
27 31 
39 ”’5 
5 ° 52,5 
2 34 
H i9’5 
3>5 
26 
11 5 
1.07 
0.98 
0.92 
0.86 
0.80 
0.75 
o 70 
0.65 
0.60 
1. 1 10 
1.025 
0.950 
0.890 
0.830 
0.775 
0.725 
0.675 
0.625 
696 
698 
698 
701 
700 
700 
700 
707 
704. 
697 
698 
698.5 
701.5 
700.5 
701 
701.5 
7 os , 5 
7 04 
86221,403 
86222,1 16 
86222,1 16 
86223,176 
86222,823 
86222,823 
86222,823 
86225,269 
86224,227 
86221,760 
86222,1 16 
86222,293 
86223,352 
86223,000 
86223, 1 76 
86223,352 
86224,750 
86224,227 
2.014 
1.718 
1.476 
1.295 
1.122 
0.982 
0.859 
0.745 
0.638 
86223,417 
86223,834 
86223,592 
86224,47 1 
86223,545 
86223,805 
86223,682 
86226,014 
86224,865 
86223,774 
86223,834 
86223,769 
86224,647 
86224,122 
86224,158 
86224,21 I 
86225,495 
86224,865 
86224,181 
— 0,479 
86224,319 
— °’479 
86223,702 
86223,840 
8,87 
Mean. 
1,13 Diff. to 50° 
Correction for Temp. i°. 13. 
Vibra. in 24 h at Temp. 50°. 
* E 
MDCCCXXVI. 
