# An Observation of the Eclipse of the Moon, by Arthur Dobs, Esq; At Castle-Dobbs Near Carrickfergus in Ireland, Feb. the 2d, 1728-9; Communicated by Oliver St. John, Esq; F.R.S.

**Author(s):** Oliver St. John, Arthur Dobs  
**Year:** 1729  
**Journal:** Philosophical Transactions (1683-1775)  
**Volume:** 36  
**Pages:** 3 pages  
**Identifier:** jstor-103513  
**JSTOR URL:** <https://www.jstor.org/stable/103513>  

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III. An Observation of the Eclipse of the Moon, by Arthur Dobs', Esq; at Castle-Dobbs near Carrickfergus in Ireland, Feb. the 2d, 1728-9; communicated by Oliver St. John, Esq; F.R.S.

Castle-Dobbs, Feb. the 8th, 1728-9.

Dear SIR,

Having had a fine Observation of the Eclipse of the Moon which happened last Sunday Evening, I have sent you it to communicate to the Royal Society, to ascertain our Longitude here, and in other Places where it was observed.

The Observation was made by a nine Foot Glass. Having adjusted a monthly Pendulum Clock by a Meridian Line on the 30th of Jan. and further corrected by the Meridian, Feb. the 6th 1728-9.

Hours apparent Time.

| h | m | s |
|---|---|---|
| 6 | 27 | 0 - - Penumbra observed. |
| 29 | 30 | 0 - - Moon's Limb immerged. |
| 33 | 0 | 0 - - Eastern Limit of Palus Mareotis immerged. |
| 35 | 50 | 0 - - Mons Climan. immerged. |
| 42 | 40 | 0 - - Mons Porphyrites immerged. |
| 50 | 0 | 0 - - Insula Melis immerged. |
| 52 | 40 | 0 - - Mons Ætna immerged. |
| 54 | 20 | 0 - - Inf. Sardinia immerged. |
| 56 | 20 | 0 - - Inf. Rhodes immerged. |
| 58 | 0 | 0 - - Inf. Corsica immerged. |

h7 - o'
Hours apparent Time.

| h   | "   |
|-----|-----|
| p.m.|     |
| 7   | 30  | Mons Sinai's, Eastern Limit immersed. |
| 2   | 0   | Mons Sinai totally immersed. |
| 6   | 50  | Inf. Besbicus, Eastern Limit immersed. |
| 11  | 50  | Mons Herminius immersed. |
| 13  | 50  | Promontory Archeroulia im. |
| 22  | 0   | Mare Caspium, Eastern Limit immersed. |
| 24  | 20  | Palus Maeotis, Eastern Limit immersed. |
| 27  | 30  | Palus Maeotis, totally immersed. |
| 30  | 15  | Moon totally immersed. |
| 9   | 8   | Moon's Eastern Limb emerged near Mons Acabe. |
| 13  | 0   | Palus Maeotis emerged. |
| 15  | 0   | Mons Climan. emerged. |
| 23  | 30  | Mons Porphyrites emerged. |
| 29  | 10  | Mons Sinai emerged. |
| 33  | 30  | Mons Ætna emerged. |
| 49  | 0   | Inf. Besbicus emerged. |
| 10  | 1   | Mare Caspium, Eastern Limit emerged. |
| 5   | 0   | Palus Maeotis emerged. |
| 10  | 0   | A Penumbra observed, the Moon's Limb emerging. |
| 11  | 0   | The Limb evidently emerged. |

From the Beginning to the End of the Eclipse 3\(^h\) 44'\(^m\) Totally Eclipsed —— 1\(^h\) 38'\(^m\) 15'\(^s\)

IV. De