4467

FOR 1897.

STYHENRY ECKFORD RHOADES, Editor.

7597-98

ECLIPSES, 1897.

(Astronomical calculations made expressly for The Tribune Almanac by Berlin H. Wright, Penn Yan, N. Y.)

There will be two eclipses this year, both of the sun, and visible as follows: I. An annular eclipse of the sun, February 1, visible in the Southern and Atlantic States, near sunset, as a small partial eclipse upon the sun's southern limb. The eclipse will be invisible north of a line drawn from near Lowell, Mass., through Harrisburg, Penn., Memphis, Texarkana and Waco, Tex. At Boston, New-York, Philadelphia, Washington and Nashville the eclipse will be very small, being scarcely more than a contact of limbs about sunset, the sun setting with the eclipse on. This eclipse will return February 13, 1915, when it will be visible in South Africa.

II. An annular eclipse of the sun, July 29, visible as a partial eclipse upon the sun's southern limb throughout the United States, except in Alaska. This eclipse will return August 10, 1915, when it will be visible in India and Southern Asia.

TO FIND THE TIME OF GREATEST ELONGATION OF POLARIS.

TABLE I.

time

By adding the numbers in the annexed table for any given latitude to the of meridian passage of Polaris (the Pole Star), in Table III, the time of its greatest western elongation is found. If the same number be subtracted instead of added, we get the time of greatest eastern elongation. At the time of either elongation the magnetic bearing Constant may be taken with the for transit compass, using that Elonga- elongation which occurs at tion. night. The eastern elɔngations occur at night from April 1 to October 11, and the western elongations oc

Constant

Lati. tude North,

for

Elonga-
tion.

Lati. tude North.

Constant
for
Elonga.
tion.

Lati. tude North.

о

H. M. S.

о

H. M. 8.

M191647

5:04:51

3:02:58

1:12:53

11:10:59 9:13:02

TABLE II.

MEAN TIME OF SIDEREAL NOON, OR MERIDIAN PASSAGE OF THE VERNAL EQUINOX AT WASHINGTON, D. C.,,

FOR 1897.

(For other places, add 9.83 seconds for each hour of longitude east of Washington, and subtract 9.83 seconds for each hour of
longitude west of Washington.)

H. M. S.

Eve.

H. M. S.

1:20:44

Morn.

H. M. S.

May.
Morn.

Eve.

H. M. S.
7:15:33
7:11:37
7:07:41

June.

July.

August. Septemb'r October. Novemb'r Decemb'r

7:19:01

7:15:05

H. M. S. I 1:17:17

1:13:21

7:11:09

5:13:12 3:11:18 1:09:25

H. M. S.
11:15:24
11:11:28
11:07:32

H. M. S.

5:09:16 3:07:22 1:05:29 11:03:36 9:01:43 7:03:46
5:05:20 3:03:26 1:01:33 10:59:40 8:57:47 6:59:50
5:01:24 2:59:31 0:57:37 10:55:44 8:53:54 6:55:54
4:57:28 2:55:35 0:53:41 10:51:48 8:49:55 6:51:58
0:53:13 10:51:20 8:53:23 6:51:29 4:53:32 2:51:39 0:49:46 10:47:52 8:45:59 6:48:02
0:49:17 10:47:24 8:49:27 6:47:33 4:49:36 2:47:43 0:45:30 10:43:57 8:42:03 6:44:06
0:45:21 10:43:28 8:45:31 6:43:38 4:45:40 2:43:47 0:41:54 10:40:01
0:41:25 10:39:32 8:41:35 6:39:42 4:41:44 2:39:51 0:37:58 10:36:05
0:37:29 10:35:36 8:37:39 6:35:46 4:37:48 2:35:55 0:34:02 10:32:09
0:33:33 10:31:40 8:33:43 6:31:50 4:33:52 2:31:59 0:30:06 10:28:13
0:29:38 10:27:44 8:29:47 6:27:54 4:29:57 2:28:03 0:26:10 10:24:17
0:25:42 10:23:49 8:25:51 6:23:58 4:26:01 2:24:07
0:21:46 10:19:53 8:21:55 6:20:02 4:22:05 2:20:11
0:17:50 10:15:57 8:17:59 6:16:06 4:18:09 2:16:16
0:13:54 10:12:01 8:14:03 6:12:10 4:14:13 2:12:20
0:09:58 10:08:05 8:10:08 6:08:14 4:10:17 2:08:24
0:06:02 10:04:09 8:06:12 6:04:18 4:06:21 2:04:28
0:02:06 10:00:13 8:02:16 6:00:22 4:02:25 2:00:32
9:56:17 7:58:21 5:56:27 3:58:29 1:56:36 11:50:47
7:54:24 5:52:31 3:54:33 1:52:40 11:46:51
7:50:28 5:48:35 3:50:37 1:48:44 11:42:55
7:46:32 5:44:39 3:46:41 1:44:48 11:38:59 9:41:02
9:40:33 7:42:36 5:40:43 3:42:46 1:40:52 11:35:03 9:37:06
11:38:31 9:36:38 7:38:40 5:36:47 3:38:50 1:36:56 11:31:07 9:33:10
11:34:35 9:32:42 7:34:44 5:32:51 3:34:54 1:33:00 11:27:12 9:29:14
11:30:39 9:28:46
3:30:58 1:29:05 11:23:16

TABLE III.

TIMES OF UPPER MERIDIAN PASSAGE OF POLARIS, OR NORTH STAR, 1897.

Surveyors and civil engineers may obtain the variation of the magnetic needle for any place in the United States by directing
their compass to the North Star (Polaris) when it is upon the meridian, as given in the table below, for the upper culmination:
or 11 hours 58 minutes 2 seconds, before or after, when the star is on the lower meridian. Exact local time is used in the table, and the
timepiece used must be correct, and the bearing of the star taken promptly on time, and that bearing will be the true variation of
the needle. An error of only a few seconds in the timepiece will vitiate the bearing found; therefore, it will be much better to
take the bearing when the star is furthest east or west, at its greatest elongation, as observations made upon it then are not affected
materially by small errors of timepieces. To use this table for places west of Washington, add 9.83 seconds for each hour of longitude
east of Washington, and subtract 9.83 seconds for each hour west of it. From February 1 to August 1, use the lower culmination.