J«d LONGITUDE of ABERDEEN. 15^ 



Determination of the Longitude of the Obfervatory at 

 Aberdeen, by Obfervations of the Lunar Echpfe of i oth 

 September 1783, made at Aberdeen and at Chiflehurfl in 

 Kent, I g" in Time Eafl of the Royal Obfervatory at 

 Greenwich. 



oi 

 O 



2 



O 



L- 



NuBcs of Spoti. 



Ariftsrrchas, 

 Kepler, 

 Copernicus, 

 Manilius covered, 

 Tycho covered, 

 Mendaas covered, 

 Dionyfius covered, 

 Plinius covered. 

 Mare Crifium E, end, 



W.end, 



Total darknefs, 



Sum, 

 Mean, 



254-9 

 8 13.17 



Ariftarchus, 

 Kepler, 

 Copernicus, 

 Plato E. end, 

 Tycho E. end, 



^W. end, 



Menelaus, 



Dionyfius, 



Fllnius, 



Mare Crifiunrt E. 



Sum, - - 95-5 



Mean per egrefe, - 9 8,68 



Mean/)fringrefe, -" . - 8 23.17 



17 31-85 

 DifF. mer. Aber. and ChHlehurft in time nearly, 8 45.92 

 Longitude of Chiflehurft in tima.E. 19. 



8 26.92 

 .12 



Longitude of Aberdeen nearly, 

 Change of equation of time in 8' a6".9 



Longitude of Aberdeen, - 



8 26.8 W. 



Deter- 



