32 



ASTRONOMICAL OBSERVATIONS. 



N°. VI. 



A hetterfrom Mr. Andri w Ellicott, to Robert 

 Patterson ; in Two Parts. 



Part firjl contains a number of Ajlronomical Obfcrvat'tons. 



Fart fccond contains the Theory and Method of calculating the 

 Aberration of the Stars, the Nutation of the Earth's Axis, and the 

 Semiannual Equation. 



PART FIRST. 



Philadelphia, April 2 J, 1 795. 

 Dear Sir, 



Read AprilT HEREWITH prefcnt you with a confiderable num- 

 3. 1795- 4 ber of Ailronomical Obfervations, which you will 

 obferve were generally made on fome very important occafions. 

 — The following immerfions, and emerfions, of the fatellites of 

 Jupiter, were obierved at Wilmington on the Delaware, by 

 MeiTrs. Rittenhoufe, Page, Andrews, and Lukens ; and at the 

 weftern obfervatory by Meffrs. Ewing, Madifon, Hutchins, and 

 myfelf, for the purpofe of determining the weflern extenfion of 

 the ftate of Pennfylvania. 



Immerferis ohferved at tlje IViJleni ol- Immerfons ohfervcd at IVilmingion in 

 firvatory />; 1 7 84. 1784. 



Day of tht 

 Month. 



July I. 



July 



July 8. 



=3 Mean Time 



i4"i7'33' 

 14 1746 

 14 1748 



13 1858 

 13 19 12 

 13 1902 



16 1 1 10 

 16 1 1 27 



Obfervers. ~ o, 

 H>8 



Page, E 



Rittenhoufe, G 

 Lukeu.. F 



PHg., E 



Rittenhoufe, G 

 Lukens. F 



P.i};e, E 



Rittenhoufe. G 



• A a 4 feet acromatic, B 5 J feetrcfleiSorui * G a 4 feet refle<3or, E a 2 feet refledor. 



C a » feet refledor, and D a 3 feet acromatic, llF 3g feet acroraatic, and H a a feet refledor. 



Aug. 3. 



