SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE. 



232 



M E M O I E 



SECULAR VARIATIONS OF THE ELEMENTS 



DEBITS OF THE EIGHT PRINCIPAL PLANETS, 



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



WITH TABLES OP THE SAME; 



TOGETHER WITH THB 



OBLIQUITY OP THE ECLIPTIC, AND THE PRECESSION OP THE EQUINOXES 

 IN BOTH LONGITUDE AND RIGHT ASCENSION. 



BY 



JOHN N. STOCKWELL, M.A. 



[ACCEPTED FOB PUBLICATION, DECEMBER, 1870.] 



