SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE. 



232 



MEMOIR 



SECULAR VARIATIONS OF THE ELEMENTS 



ORBITS OF THE EIGHT PRINCIPAL PLANETS, 



MERCURY, VENDS, THE EARTH, MARS, JUPITER, SATURN, URANUS, AND NEPTUNE; 



WITH TABLES OF THE SAME; 



TOGETHER wiTn TnE 



OBLIQUITY OF THE ECLIPTIC, AND THE PRECESSION OF THE EQUINOXES 

 IN BOTH LONQITUDE AND RIGHT ASCENSION. 



BY 



JOHN N. STOCKWELL, M.A. 



[ACCEPTED FOR PUBLICATION, DECEMBER, 1870.] 



