OF THE VIBRATIONS OF AN INVARIABLE PENDULUM 
233 
T3 
1 Thermometers. 
Standard 
Times of 
Arc registered and 
Mean 
Correc- 
tion for 
Arc. 
Corrected 
Vibrations 
at 36°. 
o .2 
is ° 
i 
4 
Barom. 
Disapp. 
Re-app. 
Coincidence. 
true Arc. 
Interval. 
to 36 \ 
1 
o 
O 
inch. 
m s 
13 09 
m s 
13 17 
21 26 
29 34 
) h 
Div. ° 
0.965= 1.16 
sc 
O. P g 
a s - s 
C <j 
“ O 0) 
o'S ^ 
2 
3 
45.6 
45.4 
29.72 
21 17 
29 25 
i 3 21 2°1.5 
1 • 
s 
s 
86305.81 
23 
12 58 
13 15 
>490.85 
+0.86 
+ 3.66 
24 
25 
43.8 
44.0 
29.76 
21 13 
29 25 
21 29 
29 41 
> 6 21 20.17 
0.308 = 0.37 
J 
# Sir 
ou 
44.7 
29.74; 
Capill. 
+ 0.019; Reduction to 32° — 0.040 
; = 29.719. 
86305.81 
. 
1 
° 
o 
inch. 
m s 
18 59 
m s 
19 07 
27 15 
35 23 
Div. o 
0.99 = 1.19 
2 
3 
43.6 
43.7 
29.77 
27 06 
35 15 
[ 7 27 10.83 
1 . 
S 
S 
86305.12 
CL) . 
23 
18 49 
19 04 
>490.86 
+ 0.95 
+ 2.86 
SC o'B 
<D • rj 
24 
25 
42.0 
42.0 
29.79 
27 03 
35 16 
27 16 
35 30 
i 10 27 09.67 
0.345 = 0.41 
J 
« £ 
1 
<D fC 
42.8 
to 
ZD 
00 
Capill. + 0.019; Redaction to 32° — 0.036 
; = 29.763. 
86305.12 
In free air; commencing - series . . . 86305.82 ; Barom. 29.685 ; Therm. 43°.95 
concluding - series 86305.12 ; Barom. 29.763 ; Therm. 42 .8 
Mean . . . 86305.47 ; Barom. 29.724 ; Therm. 43 .37 
Within the glasses 86305.81 ; Barom. 29.719 ; Therm. 44 .7 
Whence an excess of 0.34 vibr. per diem within the glasses. 
Exp. X. — Febr. 21st. Clock gaining 4 ra 14 s .38. Observer Mr. Taylor. 
No. of 
Coincid. 
Thermometers. 
Standard 
Times of 
Arc registered and 
true Arc. 
Mean 
Interval. 
Correc- 
tion for 
Arc. 
Reduct, 
to 36°. 
Corrected 
Vibrations 
at 36°. 
i 
4 
Barom. 
Disapp. 
Re-app. 
Coincidence. 
Receivers removed. 
Vibrations in free 
air. 
1 
2 
3 
23 
24 
25 
o 
o 
inch. 
m s 
8 14 
16 24 
24 35 
8 29 
16 42 
24 56 
m s 
8 21 
16 31 
24 42 
8 44 
16 58 
25 13 
/ h m s 
> 22 16 27.83 
^ 1 16 50.33 
Div. o 
0.965 = 1.16 
0.33 =0.40 
1 ■ 
>491.93 
+ 0.91 
+3.47 
86306.46 
43.9 
44.0 
29.06 
44.6 
44.4 
29.03 
44.25 
29.045; Capill. + 0.019; Reduction to 32° - 0.038; = 29.026 
86306.46 
Receivers replaced. 
Vibrations within 
the receivers. 
1 
2 
3 
23 
24 
25 
O 
O 
inch. 
m s 
58 24 
6 33 
14 42 
58 15 
6 27 
14 38 
m s 
58 33 
6 42 
14 50 
58 36 
6 47 
15 00 
/ h ms 
> 2 6 37.33 
^ 5 6 37.17 
Div. o 
0.92 =1.10 
0.295 = 0.35 
1 • 
>490.90 
+ 0.79 
+ 4.18 
86306.31 
46.6 
46.4 
29.02 
45.3 
45.3 
29.00 
45.95 
29.01 ; Capill. + 0.019; Reduction to 32° — 0.043; = 28.986. 
86306.31 
Receivers removed. 
Vibrations in free 
air. 
1 
2 
3 
23 
24 
25 
O 
O 
inch. 
m s 
50 16 
58 26 
6 35 
50 13 
58 25 
6 37 
m s 
50 27 
58 36 
6 46 
50 33 
58 47 
7 00 
1 h m s 
> 5 58 31.00 
8 58 35.83 
Div. o 
0.96 = 1.15 
0.31 = 1.37 
1 . 
>491.13 
+0.87 
+ 4.08 
86306.47 
46.3 
46.5 
29.00 
45.1 
45.2 
28.98 
45.6 
28.99; Capill. + 0.019; Reduction to 32° - 0.042; = 28.967. 
86306.47 
2 H 
MDCCCXXIX 
