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ECLIPSES OF FEBRUARY 26TH AND AUGUST 7TH.

II. Saturday, February 26th, the Moon eclipsed, invisible throughout the

United States.

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At the above times the Moon will be in the Zenith of the following places, from which it will be very easy to determine where the Eclipse will be visible. At Beginning in Long. 130° 46' East. Latitude

9° 36' North. Gr. Obs. 109 27

9 22 End

88 8 The latter part of the Eclipse will be visible in Europe.

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III. Sunday, August 7th, the Sun totally eclipsed, invisible throughout the

United States and the Continent of America.

h. m.

Beg. of the general Eclipse on the Earth at 2 39 A. M. T. at Wash’ton.

in Lat. 13° 45' S. Long. 201° 20' W.

h. m.

1

Beg. of total darkness on the Earth at 3 48. A. Mean T. at Washington.

in Lat. 29° 9' S. Long. 213° 10' W.

h. m.

Sun totally and centrally ec. on the meridian at 5 22 A. M. T. at Wash. in Lat. 26° 36' S. Long. 156° 2' W.

h. m. End of total darkness on the Earth at 6 27 A. Mean T. at Washington.

in Lat. 50° 7' S. Long. 103° g' W.

h. m.

End of the general Eclipse on the Earth at 7 36 A. M. T. at Wash'ton.

in Lat. 35° 13' S. Long. 111° 39' W. This Eclipse will be visible in the greater part of New Holland and in the Sonth Pacific Ocean, excepting a portion very near the coast of South America. The greatest north latitude attained by the path of the northern boundary of the Eclipse will be 12° 39', on the meridian of 173° 6' W.

At the Astronomical Observatory in Paramatta, in New Holland, in Latitude 33° 48' 49.8'' S., Longitude 151° 1'34'' E., the sun will rise eclipsed. The greatest obscuration (103 digits) will take place at

1971

Mean Time at Paramatta. The end of the Eclipse at

h. in.

20 163}

IV. Tuesday, August 23d, the Moon partially eclipsed; visible in part to

the portion of the United States east of the Mississippi, and wholly visible to the portion, west thereof.

City of Boston, Long. 71° 4' g'' W. Beginning of the Eclipse

3h. 59m. M. Greatest Obscuration

5 15

Mean Time at Moon sets eclipsed

5

Boston. End of the Eclipse

6 31
Digits eclipsed 5° 48' on the South, Limb of the Moon.

17

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City of New York, Long. 74° 1' W. Beginning of the Eclipse

3h. 47m. M. Greatest Obscuration

5 3

Mean Time at Moon sets eclipsed

5 20

New York. End of the Eclipse

6 19
Digits eclipsed 5° 48' on the South Limb of the Moon.

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City of Washington, Long. 76° 55' 30'' W. Beginning of the Eclipse

3h. 36m. M. Greatest Obscuration

4 52

Mean Time at Moon sets eclipsed

5 25

Washington. End of the Eclipse

6 8
Digits eclipsed 5° 48' on the Moon's South Limb.

.

City of Charleston, Long. 79° 48' W. Beginning of the Eclipse .

3h. 24m. M. Greatest Obscuration

4 40

Mean Time at Moon sets eclipsed

5 39

Charleston. End of the Eclipse

5 56
Digits eclipsed 5° 48' on the Moon's South Limb.

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City of New Orleans, Long. 90° 9' W. Beginning of the Eclipse

2h. 43m. M.

Mean Time at Greatest Obscuration

3 59

New Orleans. End of the Eclipse

15 Digits eclipsed 5° 48' on the Moon's South Limb. At the Beginning of the Eclipse the

7° 41' S. Long. 130° 42' W. Moon will be vertical in Latitude Greatest Obscuration

8 57

149 6 End of the Eclipse

10 13

167 30

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OCCULTATIONS IN 1831, Visible in Boston, and in Other Parts of the United States; the Phases of which are expressed in Mean Tine for the Meridian of Boston.

[Those marked with an asterisk will be visible in Europe.]

OCCULTATION OF A STAR BY A PLANET. March 17th. Occultation of the Star A18 by the Planet Mars. 1. The apparent Lat. and Long. of the star being deduced from the Tables of the Astronomical Society of London. Iinmersion

6h. 32m. 20s. A. 1.56'' North of the Emersion

6 35 4

1.53 Centre of I. 2. The place of the star being deduced from the Tables in the Appendix to Dr. Pearson's Practical Astronomy. Immersion

6h. 33m. 578. A. 0.31" South of the Emersion

6 37 18

0.34

Centre. S. D. of 32.59''; apparent motion of s per minute in Long. 1.532", in Lat. + 0.010''.

This will probably be an occultation throughout a very large part of the United States; but it is very doubtful whether it can be observed in any place much to the westward of Boston, on account of the proximity of the Sun to the horizon. It takes place, however, at a season of the year when the twilight is about the shortest, and at a time when the star has great altitude.

OCCULTATIONS OF STARS BY THE MOON IN 1831.

}

January 5th. Occultation of 1 g me. Immersion

2h. 28m. ls. M. 13' 45'' North of the Centre Emersion

2 57 6 14 11 of the Moon. D's Apparent S. D. at Im. 15' 5.6'' ; at Em. 15' 6.3''.

* January 21st. Occultation of K Ceti. Immersion

5h. 53m. 37.8s. A. 11' 9" South of the Emersion

6 45 56.1 13 22 Centre. D's Ap. S. D. at Im. 16' 22.5%; at Em. 16' 22.8''. February 5th.

Occultation of y. Immersion

5h. 20m. 39.48. M. 11' 1"} South of the Emersion

6 26 52.6 7 43 3 Centre. D's Ap. S. D. at Im. 14' 52.8”; at Em. 14' 53.7".

February 13th. Occultation of the Planet Venus. Contact nearest limbs of D & ? 1 42 56.7 A. ii 16.3 Immersion of f's Centre

1 43 17.8 11 15.7 Total Immersion of

1 43 39.0 11 16.2 South of the Contact nearest limbs

2 42 7.1 12 29.4 Centre. Emersion of f's Centre

2 42 27.6 12 29.8 Total Emersion of

2 42 48.1 12 30.2
D's S. D. at Im. 16' 0.7"; at Em. 16' 0.2"'. 's S. D. 4.99''.

h. m.

8.

February 16th. Occultation of » H. Immersion

8h. 55m. 32.78. A. 8 48" South of the Emersion

9 45 20.7 6 49 Centre. D's S. D. at Im. 16' 10.8'' ; at Em. 16' 8.3''.

February 19th and 20th. Occultation of Aldebaran. Immersion

19th, 11h. 43m. 22.4s. A. 14' 27" North of the Emersion

20th, 0 5 45.6 M. 15 21 S Centre. D's S. D. at Im. 16' 11.6'' ; at Em. 16' 10.4"'.

February 28th. Occultation of 1 g m. Star rises eclipsed

8h. 2m. Os. A. Emersion

8 30 48.7 1' 5" South of the Centre. D's S. D. at Em. 15' 7.0"

.

Immersion
Emersion

March 18th. Occultation of 78.

10h. 31m. 31.68. A. 2 5" South of the Centre. 11

12.5 0 29 North. D's S. D. at Im. 16' 16.3''; at Em. 16' 13.5'.

24

Immersion
Emersion

* April 15th. Occultation of Aldebaran.

10h. 41m. 44.1s. M. 13' 34" North of the

11 24 21.5 10 35 Centre. D's S. D. at Im. 16' 36.8'' ; at Em. 16.38.7".

June 17th and 18th. Occultation of 1 y. m. Immersion

17th, lih. 51m. 16.78. A. Star sets eclipsed

18th, 0 48

M.
D's S. D. at Im. 15' 7.0%.

June 29th Occultation of the Planet Jupiter and his Satellites.
Contact nearest limbs 1h. 41m. 14.58. M. 9' 44.2")
Immersion of H's Centre 1 42 29.2 9 43.6
Total Immersion

43 44.9 9 42.9 South of the
Contact nearest limbs 2 47 18.9 9 36.9 Centre.
Emersion of H's Centre 2 48 35.8 9 37.3
Total Emersion

2 49 51.8 9 37.8
D's S. D. at Im. 15' 20.2"; at Em. 15' 21.4" H's S. D. 21.60”.

Configuration of the Satellites at the Immersion, the Planet being

placed in the Centre.

O !

3 4

2

.

Immersion
Star sets eclipsed

July 19th. Occultation of you

Oh. 34m. 27.89. M. 2 36" South of the Centre.

0 48
D's S. D. at Im. 14' 46.6".

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Immersion
Emersion

Immersion
Emersion

August 28th.

Occultation of 2 Ceti.
Oh. 5m. 12.23. M. 4' 12" South of the

1 8 27.8 6 58 ) Centre.
D's S. D. at Im. 16' 10.0"; at Em. 16' 12.7".
August 29th. Occultation of f 8.

4h. 18m. 48.3s. M. 9' 54" South of the

5 15 38.1 12 433 Centre. D's S. D. at Im. 16' 20.4"; at Em. 16' 20.5". *August 29th and 30th. Occultation of y 8.

29th, 11h. 56m. 17.0s. A. 10' 15" North of the

30th, 0 44 0.8 M. 7 7) Centre. D's S. D, at Im. 16' 11.7"; at Em. 16' 14.2".

Immersion
Emersion

Immersion
Emersion

* August 30th. Occultation of Aldebaran.

8h. 28m. 6.78. M. O' 58" South of the

9 38 47.8 044 S Centre. D's S. D. at Im. 16' 20.9''; at Em. 16' 18.4".

}

October 2d. Occultation of Regulus. Immersion

6h. 6m. 11.3s. M. 15' 4" North of the Emersion

6 34 33.7 14 11) Centre. D's S. D. at Im. 15' 52.6''; at Em. 15' 53.4".

October 14th. Occultation of r Ve. Immersion

8h. 9m. 55s. A. 7' 6" ) North of the Emersion

9 24 24

5 40 Centre. D's S. D. at Im. 15' 7.6''; at Em. 15' 6.6".

* October 21st and 22d. Occultation of 1 Immersion

21st, 11h. 21m. 32.4s. A. 1' 15'' South of the Emersion

22d, 0 35 4.3 M. 5 21 ) Centre. D's S. D. at Im. 16' 39.9"; at Em. 16' 40.9".

* October 23d. Occultation of Aldebaran, Star rises

7h. 18m. Os. A. Immersion

7 28 53.6 ny' 19" North of the Emersion

8 16 19.9 4 9 ) Centre. D's S. D. at Im. 16' 29.4"; at Em. 16' 31.8".

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December 9th. Occultation of the Planet Jupiter and of all his Satel.

lites.

h. m.

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Contact nearest limbs of D & 4 6 33 13.3 A. 4 36.6
Immersion of it's Centre

6 34 0.5 4 35.4 Total Immersion

6 34 47.7 4. 34.1 North of the Contact nearest limbs

n 47 45.4 2 36.4 Centre. Emersion of H's Centre

n 48 27.9 2 35.4 Total Emersion

7 49 10.5 2 34.4
D's S. D. at Im. 15' 2.9"; at Em. 15' 1.1. It's S. D. 17.08".

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