28 



MR. RUMKER'S OBSERVATIONS 



/ // 

 4 21.50 



From another corresponding Observation made at Abo, 9th Nov. 1826 

 (Star X Piscium), I find 



A corresponding Observation made by M. Dumouchel at the Collegio 



Romano, 8th May 1827 (Star Spica), gives me 4 1G.30 



As the uncertainty of the Moon's horary motion diminishes greatly the ac- 

 curacy with which from corresponding' observations of the Transits of the 

 Moon and Stars, the difference of Longitude can be found, when this is great ; 

 and as moreover under these circumstances corresponding observations are 

 rare, I have, in order to derive some benefit from all my observations, em- 

 ployed the method explained at the end of the Table, 



Observed Right Ascensions of the Moon, and Longitude of the Observatory. 



^^ 



The Stars upon which the Moon's right ascensions repose may be referred 



to, page 24, 25, and 26. 



