226 
CAPTAIN SABINE ON THE REDUCTION TO A VACUUM 
Exp. VI. — January 31st (continued). Clock gaining 4 m 14 s .38. 
As soon as the concluding observation in air of the preceding experiment 
was completed, the air was withdrawn until the included barometer indicated 
a pressure of about half an atmosphere ; when the following observations 
were made. 
Observers. 
No. of 
Coincid. 
Thermometers. 
In- 
cluded 
Barom. 
Times of 
Arc registered 
and true Arc. 
Mean 
Interval. 
Correc- 
tion for 
Arc. 
Reduc- 
tion to 
36°. 
Corrected 
Vibrations 
at 36°. 
i 
2 
3 
4 
Disapp. 
Re-app. 
Coincidence. 
Captain J 
Sabine. - ) 
Mr. f 
Taylor.") 
1 
2 
3 
62 
63 
64 
o 
o 
O 
O 
inch. 
m s 
56 11 
04 30 
12 49 
28 32 
36 57 
45 22 
m s 
56 21 
04 42 
13 03 
29 02 
37 27 
45 48 
h m s 
^ 3 04 36.00 
J>11 37 11.33 
Die. o 
0.91 =1.09 
0.095 = 0.114 
1- 
>504.186 
+ 0.43 
+ 0.26 
86311.35 
37.0 
37.6 
37.8 
37.0 
13.90 
36.0 
36.5 
36.8 
35.7 
35.4 
36.0 
36.0 
34.6 
13.91 
36.13; + 0.5 = 36.63 
13.905; Cistern — 0.144; Index + 0.360; Red" to 32° — 0.005 ; =14.116. 
86311.35 
The air -was then admitted ; and on the next day, February 1, the following- 
observations were made. 
Observer. 
-d 
O •£ 
Thermometers. 
Stand- 
Times of 
Arc registered 
Mean 
Correc- 
Reduc- 
Corrected 
6 .5 
£ 0 
1 
2 
3 
4 
ard 
Barom. 
Disapp. 
Re-app. 
Coincidence. 
and true Arc. 
Interval. 
tion for 
Arc. 
tion to 
36°. 
Vibrations 
at 36’. 
1 
O 
0 
O 
O 
inch. 
m s 
37 18 
45 32 
m s 
37 27 
45 41 
n 
Div. o 
0.89 = 1.07 
2 
34.7 
35.2 
30.32 
>22 45 36.83 
"I 
Mr. , 
Taylor. - * 
3 
53 47 
39 17 
47 35 
55 52 
53 56 
, 
>496.67 
+ 0.69 
- 0.53 
86305.60 
23 
39 36 
n 
24 
34.8 
34.8 
30.35 
47 51 
56 10 
► 1 47 43.5 
0.255 = 0.30 
J 
25 
34.75 
30.335; Capill. + 0.019; Redaction to 32° — 0.012; = 30.342. 
86305.60 
The vibrations in this experiment were as follows : 
January 31. Previous to the vibration 
the rarefied medium 
86305.C9 ; 
February 1. Subsequent to the vibration \ gggQ^ 6 q 
in the rarefied medium j 
Barom. 30.051 inches. 
Barom. 30.342 
Mean . . . 86305.645 ; Barom. 30.196 
The vibrations in a rarefied medium reduced | j j 
to the same temperature as those in air J * 
Barom. 14.1 16 inches. 
