THE 



THEORY OF THE LONG INEQUALITY 



OP 



URANUS AND NEPTUNE, 



DEPENDING ON THE NEAR COMMENSURABILITY OF 

 THEIR MEAN MOTIONS: 



AN ESSAY, 



WHICH OBTAINED THE ADAMS PRIZE FOR THE YEAR I860, IN THE 

 UNIVERSITY OP CAMBRIDGE. 



By R. PEIRSON, M.A. 



FELLOW OF ST JOHN'S COLLEGE. 



lmmcnses pendules de l'6ternit£, qui battent les siecles comme les notres battent les secondes. 



CAMBRIDGE: 



PRINTED AT THE PITT PRESS, 



BY JOHN W. PARKER, PRINTER TO THE UNIVERSITY. 



M.DCCC.LII. 



