# Part of a Letter of Mr. Halley, Dated Chester, Octob. 25. 1697. Giving an Account of His Observations There of the Eclipse of the Moon on the 19th of the Last Month

**Author(s):** Mr. Halley  
**Year:** 1695  
**Journal:** Philosophical Transactions (1683-1775)  
**Volume:** 19  
**Pages:** 2 pages  
**Identifier:** jstor-102413  
**JSTOR URL:** <https://www.jstor.org/stable/102413>  

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IV. Part of a Letter of Mr. Halley, Dated Chester, Octob. 25. 1697. giving an Account of his Observations there of the Eclipse of the Moon on the 19th of the last Month.

I Observed the late Eclipse of the Moon, Octob. 19. with all the Satisfaction I could desire, the Air was all the while very still and clear; so that I think the Observation may be very much depended on, and will with sufficient Exactness, give the Longitude of this Place.

| Emerisions | h |
|------------|---|
| The Beginning | 6. 8 ½ |
| Porphyrites merged | 6. 16 |
| North Part of Mareotis | 6. 21 ½ |
| Lacus Niger Major and South End of Mareotis | 6. 26 |
| Besbicus | 6. 46 ½ |
| Apollonia | 6. 49 ½ |
| Byzantium | 6. 53 |
| Hermimius | 6. 59 |
| N. Part of Mæotis | 7. 2 ½ |
| Adons Corax | 7. 3 ½ |
| Mons Herculis | 7. 10 |
| S. Part of Mæotis | 7. 12 ½ |

Middle of M. Etna.
Horminius: 8. 17. 30
Mons Herculis: 8. 18. 30
Besbicus: 8. 21. 00
Apollonia: 8. 26. 15
Byzantium: 8. 29. 0
Lacus Niger Major: 8. 32. ½
S. Part of Mæotis: 8. 35.
N. Part of Mæotis: 8. 43.
The End: 8. 49. ½

About the Middle there remained 9'.26''.of the Luminous Part, and consequently the Digit. Eclipsed, 8½.

Additio