294 Captain Sabine’s comparison of barometrical and 
The following detail comprises the observations, and the 
computed results. 
From Station A, 
The circle being nine feet above half tide. 
rCAB. Foster 63 09 i(>; Sabine 6*3 09 i<>; Mean 63 09 35.* 
— 128 27 15. 
— 124 08 34. 
— 6 S »7 40. 
— 765348. 
Horizontal 
1 OAB. — 128 27 12,5 5 
— 128 27 17 
Angles. 
f OAD - — *24 08 35 ; 
— 124 08 33 
^•OAC. — — 65 1740; 
— 65 17 40 
Zenith dis- 
I Mean of 4 observations . . 
76 53 48 
tance of the 
< Mean of 2 observations . . 
— 76 53 47 
Cone. 
|^Mean of 2 observations . . 
— 76 53 4 8 
From Station B. 
Horizontal Angle A.B.C. Foster 57®4o'i i",s 5 Sabine 57°4o'i5". Mean 5 7^40' 3 2"* 
From Station C, 
The circle being nine feet above half tide. 
„ . , . { ACB. 
An * lK - (lea 
<g> 0 a @ 0 SB Q 0 if 
Foster 59 09 14; Sabine 59 09 52,5 ; Mean 590952.* 
— — 102 10335 1021033. 
96 40 36 ; — — 96 40 20 ; — - — 96 40 28. 
Zenith dis- \ Mean of 4 observations . 
tance of the < Mean of 2 observations . 
Cone. J Mean of 2 observations . 
From the Observatory, 
The circle being 31 .5 feet above half tide. 
Zenith dis- ^ Mean of 4 observations ; Sabine 82°5i' 15"^ 
^"cone 1 ' 6 | Mean of 2 observations ; — 82 51 20. | 
75 °7 47 
82° 5 1' 17", 5 . 
* One third of 57" added to complete the sum of the angles at A, B, and C to 180*. 
