ADYEUTISEMENT. 



The following Memoir, on the " General Integrals of Planetary Motion," was 

 submitted to Prof. H. A. Newton, of Yale College, and Mr. G. W. Hill, of Nyack, 

 N". Y., and has received their approval for publication in the "Smithsonian Con- 

 tributions to Knowledge." 



JOSEPH HENRY, 



Secretary Smithsonian Institution. 

 Washington, D. C, 



December, 18t4. 



(iii) 



