Observations Tor TIme a^U longitude. 
157 
Longitude by Chronometer from Altitude of a Star . 
July 7th, 1899, a Bootis (Arcturus) West of Meridian. Index error 
- r 0". Watch 50 secs, slow of G.M.T. 
° ' " Ther. Bar. 
Latitude. 51 4 24 N. 62° 29*7 iii. 
Time by Watch. Alt. of Star ih Art tf of. 
h. m. s. 0 ' " 
Mean .. ., 
Error of W atcli 
Accumulated Rate 
G.M.T. July 7 th .. 
5 ) 
IO 
3 6 
42 
1 * 
27 
30 
IO 
3 7 
59 
in 
58 
00 
IO 
39 
43 
77 
26 
00 
IO 
4i 
3 
77 
4 
20 
10 
42 
26 
76 
35 
30 
) 
197 
53 
5)387 
31 
20 
IO 
39 
54*6 
Mean . 
• • •• •• 77 
30 
16 
+ 
50 
Index Error .. .. 
1 
00 
IO 
40 
24*6 
2)77 
29 
16 
38 
44 
38 
IO 
40 
24*6 
Corrected 1 
RfifracHnn 1 1 1 * * 
.. ~ 
1 
10*3 
True Alt. 
38 43 27-7 
When a Planet is observed the Altitude must be corrected for parallax. 
o / // 
True Alt. 
38 
43 
27*7 
Latitude.. ,. 
51 
4 
24 
Sec... 
Polar Dist. .. 
7 ° 
17 
37 
Cosec. 
2 ) 160 
5 
28*7 
Half Sum 
80 
2 
44 4 3 
Cosin. 
Half Sunn 
co Alt. j ’ * 
4 i 
*9 
16*6 
Sin .. 
h. u. 
0*201816 
0*026211 
afr’s R.A. (n.a.).. 
14 
11 
6*05 
3 
r 
tt 
9*237702 
$fc 5 s Decl. (n.a.). . 
19 
90 
42 
00 
23 N. 
00 
9*819730 
Pplaf Dist. .. 
7 ? 
17 
37 
f J 28 27*4 Log. Sin. sqr. 9-28545 9 
If. 51. s. fa. fa. £. 
|| ^’s Hour Z_ .. . * .. .. 5 28 27*4 Sidereal Time (n.a 5 p. ii.). 4 ..7 0 56*69 
^’s R.A. ., 14 11 6-05 Acceleration for 10 hours .. .. 1 58*56 
--- „ ,, 40 minutes .. 6 57 
R.A. of Meridian.* 17 59 33 '45 „ 25 seconds ‘07 
Mean Sun’s R.A. 7 2 41*89 ---———»- 
—-**-*- Mean Sum’s R.A.*.7 2 41*89 
Mean Time at Place .. .. 10 36 51*56 ' 
G.M.T.io 40 24*60 
___ . . G f H ■ 
Long, in Time ... .. . 3 33 '04 Q 51 15 W. 
II N.B.—When the Star is West of the Meridian, add the hour A to the Star’s R.A. \ wheii to 
tjie East, subtract the Star’s hour A from its R.A. (increased,! if necessary, by 24 hours); the result 
is the R.A. of the Meridian ; ;from the R.A. of the Meridian (increased, if necessary, by 24 hours), 
subtract the R.A. of the Mean Sun, and the result will be the Mean Time at place, 
t See note p. 154 . 
