Memoranda for future Observers. r(oy 



anchored at nine in the morning of 19th November, 18.57, on the 

 Eastern side of St. Paul, with the purpose of prosecuting astro- 

 nomical, magnetic, meteorological, and geodesical observations 

 and measurements, and at same time examine thoroughly the 

 natural history of the island. Extremely unfavourable weather 

 in great measure delayed the expedition ; and, after having 

 successfully carried out a series of observations and researches, 

 the results of which will in due time be published, the officers 

 and naturalists in charge of the various departments, on the 

 6th December of the same year, quitted St. Paul, each bearing 

 with him the most pleasing reminiscences of that interesting 

 island, and of its three poor, but eminently kind inhabitants. 



** For the guidance of future observers the following memo- 

 randa may prove useful : — 



*' I. That the spot at which observations were taken was on 

 a small eminence, north of the huts of the colonists, and which 

 piay be recognized by a small pyramid of stones, on which the 

 Austrian Expedition marked the observed latitude 38° 42' 55'' 

 S., and the longitude 77° 31' 18" E. of Greenwich.* Further 

 that : — 



* The time, wliich we took from the Cape Observatory by four excellent chrono- 

 meters, gave, on our voyage between the Cape and St. Paul, a period of forty- six days, 

 a diiference of 3 h. 56 niin. 11 sec, which the island was E. of the Cape, so that 

 adding the Longitude of the latter East of Greenwich (by nautical almanack), 1 h. 

 13 min. 55 s., we have the Longitude of St. Paul 5h. 10 min. Cs. East of Greenwich 

 (77° 31' 30" E.) Between Madras and St. Paul, during a long passage of sixty- 

 seven days, and with six chronometers somewhat less accurately set than the pre- 

 ceding, St. Paul was found by observation to be h. 10 min. 51.8 sec. West of 

 Madras (2° 42' 55" W.) By the longitude of the Observatory of Madras, 5 h. 

 20 min. 57 sec. East of Greenwich (80° 14' 15" E.), as fiu-nishcd by the Dkector of 



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