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gives an account of one at Rome. At a more refined period of the science, in 1576, Dante placed in the south wall of the church of St. Petronia, at Bologna, a brass plate, inclined to the wall 45°, which was the latitude of the place; the height of which, from the ground, was 66 feet. The sun's image was transmitted through a hole in this brass plate, to the marble pavement of the church, on which was traced the meridian line, which extended 169 feet; on this line were marked the equinoxes and solstices.

In 1645, in the same church, the celebrated Cassini, drew another meridian line; he placed his plate of perforated metal, in the roof of the church. In commemoration of this performance, a medal was struck, on one side was the profile of Cassini, on the reverse, the church of St. Petronia, through the roof of which, a ray of light is proceeding from the sun, which, falling on the pavement, determines the time of the sun's passage of the meridian. The accompanying is a copy of this medal.

SOLAR PHENOMENA. The sun enters Scorpio at 55 min. after 9 of the morning of the 23d of this month.

LUNAR PHENOMENA.

Phases of the Moon.
First Quarter, 1st day at 37 min. after 7 evening.
Full Moon, 9th ...... 36 ........ 7
Last Quarter, 16th ...... 33 ....
New Moon, 23rd ...... 48 ........ 6

First Quarter, 31st ...... 6 ........ 4 afternoon. Conjunctions of the Moon with the Planets and Stars. October 4th, with Uranus ....... at 9 evening.

7th, .... Jupiter .......... 6

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October 13th, with Mars .......... at noon.

16th, ..., 5 in Gemini ....., 2 morning.
20th, .... Saturn .......... midnight.
23rd, .... Mercury ........ 4 afternoon.
25th, .... Venus ........... 3

PHENOMENA PLANETARUM. Mercury at his greatest north latitude on the 5th of this month. In conjunction with g in Virgo, on the 15th, difference of latitude 16'. In superior conjunction with the sun, at 2 in the afternoon of the 23rd. In conjunction with 1 in Virgo, on the 26th, difference of latitude 14. Descending node on the 28th.

Venus in conjunction with in Virgo, on the 8th, difference of latitude 10'. Descending node on the 16th.

Phases of Venus. The following are the proportions of the bright and dark phases of this planet :October 1st.-Illuminated disc = 11.4378

Dark part .... = 1.5622 Mars will be stationary on the 14th. In conjunction with 2 k in Taurus, at 11 in the morning of the 28th.

The Asteroids.

Hrs. Min. Vesta, 3rd day. Right Ascension, 13 0 S. Declin. 1° 9' 11th .....

.. 13 31 ....... 27th

. 13 47 is · 5 51 Juno, 3rd

. 12 56 .......... 141 11th 19th

13 18 .......... 3 29 27th Pallas, 3rd 11th

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27th

Pallas, 19th day. Right Ascension. 23 25 S. Declin. 11° 17' 27th

23 23 .......... 12 31 Ceres, 3rd

3 1 N. Declin. 5 13 11th

2 56 .. 19th

2 50 .......... 4 28 2 43

.......... 4 9 31st ....... ............ 2 39 .......... 4 1 Ceres in opposition on the 31st, in a line with, and equally distant from v and Menkar, in Cetus; a line drawn from 1 and y in the same constellation, will pass through the asteroid. Ceres is of a ruddy colour, surrounded with nebulosity, which gives it the appearance of a comet; it shines as a star of the eighth magnitude. Eclipses of the Satellites of Jupiter.

EMERSIONS.
First Satellite, 1st day at 45 min. 48 sec. after 9 night.

8th .... 41 .... 10 .......,
10th .... 10 .... 0

... 6
16th .... 36 .... 40 ... 1 morning.
17th .... 5.... 32 ... 8 night.
24th ....

31st .....
Second Satellite, 16th .... 29 .... 57

23rd .... 5.... 29
30th ....

midnight. Third Satellite, 12th .... 54 .... 34 ........ 9 night.

20th .... 55 .... 53 ........ 1 morning. Fourth Satellite, 2nd .... 57 .... 45 ........ 10 night.

IMMERSIONS.
Third Satellite, 19th day at 54 min. 2 sec. after 10 night.
Fourth Satellite, 2nd .... 1.... 25 .........

Saturn in conjunction with ß in Virgo, at 3 in the morning of the 30th.

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