1G2 
REV. F. FALLOWS’S OBSERVATIONS WITH AN INVARIABLE 
Observations computed. The clock making on the 23rd, 86636.826*, on the 
24th, 86636.916*, and on the 25th, 86637-024* sidereal vibrations in a mean 
solar day. 
Number of 
Observations. 
Mean Temp. 
Interval. 
Vib'”' in 24 Mean 
Solar Hours. 
Correc. for 
Arc. 
Reduc. to 
02° Fahr. 
Reduced Vib ns in 
24 Mean Solar 
Hours at 62° F. 
1 
73°.95 
h m s 
2 37 10.0 
86085.584 
+ 0.891 
+ 5.031 
86091.506 
o 
73.47 
2 37 11.0 
86085.643 
1.024 
4.829 
86091-496 
3 
69-80 
2 37 34.5 
86087-102 
1.164 
3.284 
86091.550 
4 
70.02 
2 37 36.0 
86087-189 
1.232 
3.376 
86091.794 
5 
69-05 
2 37 37-5 
86087-276 
1.249 
2.968 
86091.493 
6 
67-30 
2 37 56.5 
86088.486 
1-077 
2.231 
86091.794 
7 
69-40 
2 37 44.5 
86087-790 
1-329 
3.115 
86092.234 
8 
72.85 
2 37 15.0 
86086.073 
1.138 
4.568 
86091.779 
9 
72.25 
2 37 23.5 
86086.569 
-+• 1.114 
+ 4.315 
86091-998 
M ean . . 
70.90 
Mean. . . . 
Correction for buoyancy 
86091-738 
+ 5.900 
Number of Vibrations in vacuo, in 24 Mean Solar Hours. . 
86097-638 
Rate of the Sidereal Clock. 
Nov. 22 nd. 
Nov. 24th. 
Nov. 25th. 
Stars. 
Rates. 
Compared with Observations 
of the 19 th and 21 st. 
Stars. 
Rates. 
Compared with Observations 
of the 22 nd. 
Stars. 
Rates. 
Compared with Observations 
of the 22ud and 24th. 
a Pegasi .... 
a Andromedae 
7 Pegasi .... 
/3 Arietis .... 
s 
+ 0 . 10 - 
-07 
.04 
.12 
.13 
-17 
.28 
-37 
+ -23_ 
+ .168 
> 
a Arietis . . 
a Ceti .... 
7 Eridani. . 
Aldebaran . 
+o s .io-| 
.29 { 
.42 f 
•35 J 
a Pegasi .... 
a App. Sc. . . 
I /3 Arietis .... 
a . . . . 
0 Ceti 
5 
7 
a 
7 Eridani. . . . 
Aldebaran . . 
Mean. . 
s 
+ 0.351 
.40 
.45 
.24 
•49 
.36 
.43 
-69 
.55 
+ -63 w 
+ -459 
► 
cc — — — .... 
7 Ceti 
a 
7 Eridani. . . . 
Aldebaran . . 
Mean. . 
Mean. . 
+ -290 
1 1 ere the rate appears to have been increasing, and therefore a proportion 
was made for each day’s observations, thus : 
s 
For the observations of the 23d, Rate + 0.270 
24th, . . . + .360 
25th, . . . + .468 
* Note. — I n these numbers, both in this and the two following series, the rate of the clock is in- 
cluded, being = 8GG3G.55G + rate. 
