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MARYLAND GEOLOGICAL SURVEY 513
TABLE XV.
Local mean (astronomical1) time of the culminations and elongations of Polaris in the year 1897.
[Adapted2 for latitude.39° north and longitude 75° or 5 h. west of Greenwich.]
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Date.
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East Elongation.
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Upper
Culmination.
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West Elongation.
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Lower
Culmination.
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1887.
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h. m.
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h. m.
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h. m.
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h. m.
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January 1.....
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0 38.0
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6 33.9
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12 28.7
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18 32.0
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15.......
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23 39.7
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5 38.6
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11 33.4
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17 36.7
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February 1.....
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22 32.6
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4 31.5
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10 26.3
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16 29.6
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15......
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21 37.3
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3 36.2
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9 31.1
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15 34.3
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March 1.....
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20 42.1
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2 41.0
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8 35.8
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14 39.1
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15.......
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19 47.1
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1 46.0
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7 40.7
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13 44.0
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April 1....
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18 40.1
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0 38.9
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6 33.7
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12 37.0
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15.......
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17 45.1
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23 40.0
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5 38.7
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11 41.9
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May 1 ....
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16 42.2
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22 37.1
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4 35.9
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10 39.0
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15....
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15 47.3
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21 42.2
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3 41.0
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9 44.1
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June 1.....
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14 40.6
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20 35.6
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2 34.3
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8 37.5
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15.....
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13 45.7
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19 40.7
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1 39.4
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7 42.6
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July 1....
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12 43.1
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18 38.1
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0 36.8
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6 40.0
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15.......
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11 48.2
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17 43.2
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23 38.0
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5 45.1
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August 1.....
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10 41.7
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16 36.7
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22 31.4
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4 38.6
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15 ....
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9 46.8
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15 41.8
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21 36.5
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3 43.7
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September 1.....
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8 40.2
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14 35.2
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20 29.9
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2 37.1
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15.......
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7 45.3
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13 40.3
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19 35.0
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1 42.2
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October 1.....
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6 42.4
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12 37.4
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18 32.1
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0 39.3
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15.......
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5 47.4
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11 42.4
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17 37.1
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23 40.5
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November 1.....
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4 40.6
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10 35.6
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16 30.3
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22 33.7
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15......
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3 45.4
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9 40.4
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15 35.2
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21 38.5
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December 1.....
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2 42.4
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8 37.4
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14 32.2
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20 35.5
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15.......
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1 47.1
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7 42.1
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13 37.0
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19 40.2
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1 The astronomical day begins 12 hours after the civil day, i. f. commences
at noon on the civil day of same date. The hours are counted from noon,
from O to 24.
2 The table was obtained from the one given in Bulletin 14 of the Coast,
and Geodetic Survey or in App. 1, C. and G. S. Report for 1891 by applying
the following corrections: + 2.7 m. to refer to the year 1897, this correction
being furnished me by the Coast and Geodetic Survey; + 0.16m. to make
table apply to 75° west; +0.13 m. and —0.13 m. to times of west and
east elongations respectively, to refer table to latitude 39°. Although the
table, as stated on top, has been especially adapted for latitude 39° and
longitude 75° west, it may be used over the entire state without committing
a greater error on this account than 0.1 minute.—L. A. B.
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